{"id":1843,"date":"2024-06-22T12:41:52","date_gmt":"2024-06-22T12:41:52","guid":{"rendered":"https:\/\/tryvary.com\/?p=1843"},"modified":"2024-06-22T12:41:52","modified_gmt":"2024-06-22T12:41:52","slug":"copper-clad-laminate-dielectric-constant-values","status":"publish","type":"post","link":"https:\/\/tryvary.com\/vi\/gia-tri-hang-so-dien-moi-ma-dong\/","title":{"rendered":"Gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i m\u1ea1 \u0111\u1ed3ng \u0111\u01b0\u1ee3c ti\u1ebft l\u1ed9"},"content":{"rendered":"<p>T\u1ea5m ph\u1ee7 \u0111\u1ed3ng, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong b\u1ea3ng m\u1ea1ch in (PCB), c\u00f3 nhi\u1ec1u \u0111\u1eb7c \u0111i\u1ec3m kh\u00e1c nhau <strong>gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> t\u00f9y thu\u1ed9c v\u00e0o th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u, t\u1ea7n s\u1ed1 v\u00e0 \u0111\u1ed9 d\u00e0y, \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn <strong>t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong>&#44; <strong>tr\u1edf kh\u00e1ng ph\u00f9 h\u1ee3p<\/strong>v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 c\u1ee7a PCB. Gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i n\u1eb1m trong kho\u1ea3ng t\u1eeb 3,3 \u0111\u1ebfn 4,8, ch\u1ecbu \u1ea3nh h\u01b0\u1edfng b\u1edfi <strong>th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u laminate<\/strong> v\u00e0 h\u00e0nh vi ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1. Ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf PCB. V\u00ec s\u1ef1 thay \u0111\u1ed5i t\u1ea7n s\u1ed1 v\u00e0 \u0111\u1ed9 d\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i n\u00ean vi\u1ec7c hi\u1ec3u c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 <strong>thi\u1ebft k\u1ebf PCB t\u1ea7n s\u1ed1 cao<\/strong>. Kh\u00e1m ph\u00e1 s\u00e2u h\u01a1n cho th\u1ea5y t\u1ea7m quan tr\u1ecdng c\u1ee7a c\u00e1c \u0111\u1eb7c t\u00ednh nhi\u1ec7t, \u0111i\u1ec7n v\u00e0 h\u00fat \u1ea9m trong c\u00e1c l\u1edbp m\u1ea1 \u0111\u1ed3ng.<\/p>\n<h2>B\u00e0i h\u1ecdc ch\u00ednh<\/h2>\n<ul>\n<li>T\u1ea5m FR4 c\u00f3 gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i dao \u0111\u1ed9ng t\u1eeb 3,3 \u0111\u1ebfn 4,8, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh ch\u1ea5t \u0111i\u1ec7n v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a PCB.<\/li>\n<li>C\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i thay \u0111\u1ed5i theo c\u00e1c t\u1ea7n s\u1ed1 kh\u00e1c nhau trong c\u00e1c l\u1edbp m\u1ea1 \u0111\u1ed3ng, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u trong c\u00e1c thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao.<\/li>\n<li>S\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0y trong c\u00e1c l\u1edbp ph\u1ee7 \u0111\u1ed3ng t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i, s\u1ef1 truy\u1ec1n t\u00edn hi\u1ec7u v\u00e0 \u0111\u1eb7c t\u00ednh tr\u1edf kh\u00e1ng.<\/li>\n<li>Ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf PCB, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7n s\u1ed1 cao.<\/li>\n<li>C\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau cung c\u1ea5p ph\u1ea1m vi h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee5 th\u1ec3 cho c\u00e1c gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p, khi\u1ebfn vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u tr\u1edf n\u00ean quan tr\u1ecdng \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t t\u1ea7n s\u1ed1 cao.<\/li>\n<\/ul>\n<h2>T\u00f9y ch\u1ecdn v\u1eadt li\u1ec7u ph\u1ee7 \u0111\u1ed3ng<\/h2>\n<div class=\"embed-youtube\" style=\"position: relative; width: 100%; height: 0; padding-bottom: 56.25%; margin-bottom:20px;\"><iframe style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%;\" src=\"https:\/\/www.youtube.com\/embed\/h0JaGQP9QAE\" title=\"Tr\u00ecnh ph\u00e1t video YouTube\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/div>\n<p>C\u00e1c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u1ee7 \u0111\u1ed3ng bao g\u1ed3m nhi\u1ec1u lo\u1ea1i <strong>c\u00f4ng th\u1ee9c ch\u1ea5t n\u1ec1n<\/strong>, m\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c nhu c\u1ea7u c\u1ee5 th\u1ec3 trong thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t b\u1ea3ng m\u1ea1ch in (PCB). Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u c\u00e1n m\u1ecfng ph\u00f9 h\u1ee3p l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u00e1c t\u00ednh ch\u1ea5t \u0111i\u1ec7n, t\u00ednh ch\u1ea5t nhi\u1ec7t v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 c\u1ee7a PCB.<\/p>\n<p>Trong mi\u1ec1n c\u1ee7a <strong>\u1ee9ng d\u1ee5ng t\u1ea7n s\u1ed1 cao<\/strong>, v\u1eadt li\u1ec7u nhi\u1ec1u l\u1edbp c\u00f3 h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i th\u1ea5p \u0111\u01b0\u1ee3c \u01b0u ti\u00ean \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 suy gi\u1ea3m t\u00edn hi\u1ec7u. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c l\u1ef1a ch\u1ecdn laminate chi ph\u00ed th\u1ea5p c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft k\u1ebf PCB kh\u00f4ng quan tr\u1ecdng.<\/p>\n<p>T\u1ea5m FR4, m\u1ed9t l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn trong ng\u00e0nh c\u00f4ng nghi\u1ec7p PCB, mang l\u1ea1i s\u1ef1 c\u00e2n b\u1eb1ng \u0111\u00e1ng tin c\u1eady gi\u1eefa c\u00e1c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n, \u0111\u1eb7c t\u00ednh nhi\u1ec7t v\u00e0 chi ph\u00ed. H\u1ecd th\u1ec3 hi\u1ec7n m\u1ed9t <strong>h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> t\u1eeb 3,3 \u0111\u1ebfn 4,8, \u0111\u1ea3m b\u1ea3o \u0111\u1eb7c t\u00ednh c\u00e1ch nhi\u1ec7t \u0111\u00e1ng tin c\u1eady v\u00e0 <strong>c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng s\u1ef1 c\u1ed1<\/strong> kho\u1ea3ng 20 kV\/mm. V\u1edbi s\u1ef1 kh\u00e1c nhau <strong>nhi\u1ec7t \u0111\u1ed9 chuy\u1ec3n th\u1ee7y tinh<\/strong> v\u00e0 m\u1ed9t <strong>\u0110\u00e1nh gi\u00e1 t\u00ednh d\u1ec5 ch\u00e1y UL94-V0<\/strong>&#44; <strong>T\u1ea5m FR4<\/strong> \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u PCB \u0111a d\u1ea1ng.<\/p>\n<h2>Ph\u1ea1m vi gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/dielectric_constant_definition_and_ranges.jpg\" alt=\"\u0111\u1ecbnh ngh\u0129a v\u00e0 ph\u1ea1m vi h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>C\u00e1c <strong>h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> ph\u1ea1m vi gi\u00e1 tr\u1ecb c\u1ee7a t\u1ea5m ph\u1ee7 \u0111\u1ed3ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nhau <strong>t\u00ednh ch\u1ea5t v\u1eadt ch\u1ea5t<\/strong>, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a t\u1ea5m g\u1ed7 \u1edf c\u00e1c d\u1ea3i t\u1ea7n s\u1ed1 kh\u00e1c nhau.<\/p>\n<p>Cu\u1ed9c th\u1ea3o lu\u1eadn ti\u1ebfp theo s\u1ebd kh\u00e1m ph\u00e1 c\u00e1c \u0111\u1eb7c t\u00ednh v\u1eadt ch\u1ea5t, <strong>s\u1ef1 ph\u1ee5 thu\u1ed9c t\u1ea7n s\u1ed1<\/strong>v\u00e0 s\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i, cu\u1ed1i c\u00f9ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 c\u1ee7a t\u1ea5m g\u1ed7.<\/p>\n<h3>Hi\u1ec7u \u1ee9ng thu\u1ed9c t\u00ednh v\u1eadt ch\u1ea5t<\/h3>\n<p>Trong ph\u1ea1m vi c\u1ee7a <strong>t\u1ea5m ph\u1ee7 \u0111\u1ed3ng<\/strong>, c\u00e1c <strong>gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> ph\u1ea1m vi b\u1ecb \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn b\u1edfi c\u00e1c t\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u kh\u00e1c nhau. Th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u c\u1ee7a t\u1ea5m laminate, bao g\u1ed3m lo\u1ea1i v\u00e0 l\u01b0\u1ee3ng nh\u1ef1a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i.<\/p>\n<p>V\u00ed d\u1ee5, <strong>T\u1ea5m FR4<\/strong> Gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng t\u1eeb 3,3 \u0111\u1ebfn 4,8, t\u00f9y thu\u1ed9c v\u00e0o c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 ki\u1ec3u d\u1ec7t v\u00e0 h\u00e0m l\u01b0\u1ee3ng nh\u1ef1a. Ng\u01b0\u1ee3c l\u1ea1i, <strong>v\u1eadt li\u1ec7u hi\u1ec7u su\u1ea5t cao<\/strong> nh\u01b0 PTFE c\u00f3 th\u1ec3 cung c\u1ea5p gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i th\u1ea5p h\u01a1n so v\u1edbi c\u00e1c t\u1ea5m FR4 ti\u00eau chu\u1ea9n.<\/p>\n<p>H\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee7a t\u1ea5m \u0111\u1ed3ng ph\u1ee7 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong <strong>t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong> TRONG <strong>thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao<\/strong>, v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng <strong>tr\u1edf kh\u00e1ng ph\u00f9 h\u1ee3p<\/strong> v\u00e0 hi\u1ec7u su\u1ea5t m\u1ea1ch t\u1ed5ng th\u1ec3. S\u1ef1 thay \u0111\u1ed5i gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u00f3 th\u1ec3 c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a m\u1ea1ch t\u1ed1c \u0111\u1ed9 cao, nh\u1ea5n m\u1ea1nh t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c \u0111o v\u00e0 ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf PCB.<\/p>\n<h3>D\u1ea3i ph\u1ee5 thu\u1ed9c t\u1ea7n s\u1ed1<\/h3>\n<p>Tr\u00ean m\u1ed9t ph\u1ea1m vi t\u1ea7n s\u1ed1 r\u1ed9ng, <strong>gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> c\u1ee7a <strong>t\u1ea5m ph\u1ee7 \u0111\u1ed3ng<\/strong> th\u1ec3 hi\u1ec7n m\u1ed9t s\u1ef1 thay \u0111\u1ed5i \u0111\u00e1ng ch\u00fa \u00fd, nh\u1ea5n m\u1ea1nh t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c hi\u1ec3u <strong>h\u00e0nh vi ph\u1ee5 thu\u1ed9c t\u1ea7n s\u1ed1<\/strong> TRONG <strong>thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao<\/strong>.<\/p>\n<p>Ph\u1ea1m vi ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 n\u00e0y c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng ch\u00fa \u00fd \u0111\u1ebfn <strong>c\u00e2n nh\u1eafc t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong>, v\u00ec s\u1ef1 thay \u0111\u1ed5i gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a m\u1ea1ch \u0111i\u1ec7n t\u1eed. Ki\u1ebfn th\u1ee9c ch\u00ednh x\u00e1c v\u1ec1 ph\u1ea1m vi gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i l\u00e0 c\u1ea7n thi\u1ebft cho vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u trong c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, trong \u0111\u00f3 vi\u1ec7c l\u1ef1a ch\u1ecdn sai c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn <strong>hi\u1ec7u su\u1ea5t b\u1ecb t\u1ed5n h\u1ea1i<\/strong>.<\/p>\n<p>C\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee7a c\u00e1c l\u1edbp ph\u1ee7 \u0111\u1ed3ng kh\u00e1c nhau c\u00f3 th\u1ec3 thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 trong m\u1ed9t d\u1ea3i t\u1ea7n s\u1ed1 c\u1ee5 th\u1ec3, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u h\u00e0nh vi ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 c\u1ee7a ch\u00fang. S\u1ef1 hi\u1ec3u bi\u1ebft n\u00e0y r\u1ea5t quan tr\u1ecdng trong c\u00e1c thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao, trong \u0111\u00f3 vi\u1ec7c c\u00e2n nh\u1eafc t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u l\u00e0 \u0111i\u1ec1u t\u1ed1i quan tr\u1ecdng.<\/p>\n<h3>T\u00e1c \u0111\u1ed9ng thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0y<\/h3>\n<p>S\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0y c\u1ee7a l\u1edbp ph\u1ee7 \u0111\u1ed3ng \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i, t\u1eeb \u0111\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 truy\u1ec1n t\u00edn hi\u1ec7u v\u00e0 \u0111\u1eb7c t\u00ednh tr\u1edf kh\u00e1ng trong c\u00e1c thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao. C\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i cho c\u00e1c l\u1edbp ph\u1ee7 \u0111\u1ed3ng c\u00f3 th\u1ec3 thay \u0111\u1ed5i d\u1ef1a tr\u00ean \u0111\u1ed9 d\u00e0y, v\u1edbi ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh tr\u1ea3i d\u00e0i t\u1eeb 3,3 \u0111\u1ebfn 4,8. C\u00e1c l\u1edbp ph\u1ee7 \u0111\u1ed3ng d\u00e0y h\u01a1n c\u00f3 xu h\u01b0\u1edbng th\u1ec3 hi\u1ec7n h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i cao h\u01a1n trong ph\u1ea1m vi quy \u0111\u1ecbnh do kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt li\u1ec7u t\u0103ng l\u00ean.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: center\">\u0110\u1ed9 d\u00e0y (mm)<\/th>\n<th style=\"text-align: center\">D\u1ea3i h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/th>\n<th style=\"text-align: center\">Kh\u1ed1i l\u01b0\u1ee3ng v\u1eadt li\u1ec7u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: center\">0.5<\/td>\n<td style=\"text-align: center\">3.3-3.8<\/td>\n<td style=\"text-align: center\">Th\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">1.0<\/td>\n<td style=\"text-align: center\">3.5-4.2<\/td>\n<td style=\"text-align: center\">Trung b\u00ecnh<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">1.5<\/td>\n<td style=\"text-align: center\">3.8-4.5<\/td>\n<td style=\"text-align: center\">Cao<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">2.0<\/td>\n<td style=\"text-align: center\">4.0-4.8<\/td>\n<td style=\"text-align: center\">R\u1ea5t cao<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 thay \u0111\u1ed5i h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i trong c\u00e1c l\u1edbp ph\u1ee7 \u0111\u1ed3ng l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft cho c\u00e1c thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao \u0111\u00f2i h\u1ecfi t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 ki\u1ec3m so\u00e1t tr\u1edf kh\u00e1ng ch\u00ednh x\u00e1c. Gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i trong t\u1ea5m ph\u1ee7 \u0111\u1ed3ng \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh hi\u1ec7u su\u1ea5t \u0111i\u1ec7n v\u00e0 ch\u1ee9c n\u0103ng t\u1ed5ng th\u1ec3 c\u1ee7a b\u1ea3ng m\u1ea1ch in. B\u1eb1ng c\u00e1ch nh\u1eadn bi\u1ebft t\u00e1c \u0111\u1ed9ng c\u1ee7a s\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9 d\u00e0y \u0111\u1ed1i v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 n\u00e2ng cao thi\u1ebft k\u1ebf PCB c\u1ee7a m\u00ecnh \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t \u0111i\u1ec7n cao nh\u1ea5t.<\/p>\n<h2>T\u00ednh ch\u1ea5t nhi\u1ec7t v\u00e0 \u0111i\u1ec7n<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/material_characteristics_in_depth.jpg\" alt=\"\u0111\u1eb7c t\u00ednh v\u1eadt li\u1ec7u theo chi\u1ec1u s\u00e2u\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>Trong l\u0129nh v\u1ef1c t\u00ednh ch\u1ea5t nhi\u1ec7t v\u00e0 \u0111i\u1ec7n, <strong>t\u1ea5m ph\u1ee7 \u0111\u1ed3ng<\/strong> th\u1ec3 hi\u1ec7n m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ri\u00eang bi\u1ec7t r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t c\u1ee7a ch\u00fang trong c\u00e1c \u1ee9ng d\u1ee5ng b\u1ea3ng m\u1ea1ch in (PCB). C\u00e1c <strong>d\u1eabn nhi\u1ec7t<\/strong> c\u1ee7a c\u00e1c t\u1ea5m m\u1ecfng n\u00e0y, b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 h\u00e0m l\u01b0\u1ee3ng nh\u1ef1a v\u00e0 th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u, \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ea3n nhi\u1ec7t.<\/p>\n<p>Li\u00ean quan \u0111\u1ebfn \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n m\u00f4i, c\u00e1c l\u1edbp ph\u1ee7 \u0111\u1ed3ng c\u00f3 h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i (Dk) n\u1eb1m trong kho\u1ea3ng t\u1eeb 3,3 \u0111\u1ebfn 4,8, khi\u1ebfn ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng PCB kh\u00e1c nhau. <strong>T\u1ea5m FR4<\/strong>, m\u1ed9t lo\u1ea1i t\u1ea5m ph\u1ee7 \u0111\u1ed3ng ph\u1ed5 bi\u1ebfn, c\u00f3 \u0111\u1ed9 d\u00e0y ti\u00eau chu\u1ea9n l\u00e0 1,57 mm v\u00e0 <strong>\u0111\u00e1nh gi\u00e1 t\u00ednh d\u1ec5 ch\u00e1y c\u1ee7a UL94-V0<\/strong>. Nh\u1eefng l\u1edbp n\u00e0y c\u0169ng c\u00f3 nhi\u1ec7t \u0111\u1ed9 th\u1ee7y tinh (Tg) kho\u1ea3ng 130\u00b0C \u0111\u1ed1i v\u1edbi c\u00e1c bi\u1ebfn th\u1ec3 c\u00f3 Tg th\u1ea5p v\u00e0 kho\u1ea3ng 170\u00b0C \u0111\u1ed1i v\u1edbi c\u00e1c bi\u1ebfn th\u1ec3 c\u00f3 Tg cao.<\/p>\n<p>C\u00e1c <strong>c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng s\u1ef1 c\u1ed1<\/strong> kho\u1ea3ng 20 kV\/mm l\u00e0m n\u1ed5i b\u1eadt <strong>kh\u1ea3 n\u0103ng c\u00e1ch \u0111i\u1ec7n<\/strong>. Hi\u1ec3u c\u00e1c t\u00ednh ch\u1ea5t nhi\u1ec7t v\u00e0 \u0111i\u1ec7n n\u00e0y l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 thi\u1ebft k\u1ebf PCB \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u qu\u1ea3. B\u1eb1ng c\u00e1ch xem x\u00e9t nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 t\u1ed1i \u01b0u h\u00f3a <strong>thi\u1ebft k\u1ebf PCB<\/strong> v\u00e0 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t cao nh\u1ea5t.<\/p>\n<h2>T\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc v\u00e0 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/chemical_properties_absorption_study.jpg\" alt=\"Nghi\u00ean c\u1ee9u h\u1ea5p th\u1ee5 t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>Khi \u0111\u00e1nh gi\u00e1 t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a t\u1ea5m ph\u1ee7 \u0111\u1ed3ng, c\u1ea7n ph\u1ea3i t\u00ednh \u0111\u1ebfn t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u1ea5u tr\u00fac h\u00f3a h\u1ecdc l\u00ean <strong>gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong>.<\/p>\n<p>Ty\u0309 l\u00ea\u0323 cu\u0309a <strong>h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/strong> v\u00e0 \u0111\u1eb7c t\u00ednh h\u00fat \u1ea9m c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u n\u00e0y c\u0169ng \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh t\u00ednh ph\u00f9 h\u1ee3p c\u1ee7a ch\u00fang \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng PCB c\u1ee5 th\u1ec3.<\/p>\n<h3>T\u00e1c \u0111\u1ed9ng c\u1ea5u tr\u00fac h\u00f3a h\u1ecdc<\/h3>\n<p>C\u00e1c <strong>h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> c\u1ee7a <strong>\u0111\u1ed3ng \u0111\u00e1 phi\u1ebfn<\/strong> v\u1eadt li\u1ec7u b\u1ecb \u1ea3nh h\u01b0\u1edfng r\u1ea5t nhi\u1ec1u b\u1edfi <strong>c\u1ea5u t\u1ea1o h\u00f3a h\u1ecdc<\/strong>, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh th\u00f4ng qua vi\u1ec7c l\u1ef1a ch\u1ecdn chi\u1ebfn l\u01b0\u1ee3c <strong>c\u00e1c lo\u1ea1i nh\u1ef1a<\/strong> V\u00e0 <strong>ch\u1ea5t ph\u1ee5 gia<\/strong>. C\u1ea5u tr\u00fac h\u00f3a h\u1ecdc n\u00e0y c\u00f3 t\u00e1c \u0111\u1ed9ng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i, cu\u1ed1i c\u00f9ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn <strong>t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong> trong c\u00e1c \u1ee9ng d\u1ee5ng PCB. S\u1ef1 thay \u0111\u1ed5i th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee7a t\u1ea5m, d\u1eabn \u0111\u1ebfn vi\u1ec7c truy\u1ec1n t\u00edn hi\u1ec7u kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n<p>C\u00e1c lo\u1ea1i nh\u1ef1a v\u00e0 ch\u1ea5t ph\u1ee5 gia kh\u00e1c nhau \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee7a t\u1ea5m ph\u1ee7 \u0111\u1ed3ng. B\u1eb1ng c\u00e1ch hi\u1ec3u c\u00e1c t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a t\u1ea5m c\u00e1n m\u1ecfng, nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t <strong>h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/strong>, c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i. Gi\u00e1m s\u00e1t m\u1ee9c \u0111\u1ed9 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i \u1ed5n \u0111\u1ecbnh trong v\u1eadt li\u1ec7u d\u00e1t m\u1ecfng ph\u1ee7 \u0111\u1ed3ng.<\/p>\n<p>\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng PCB, n\u01a1i t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u ph\u1ee5 thu\u1ed9c v\u00e0o h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i \u1ed5n \u0111\u1ecbnh. B\u1eb1ng c\u00e1ch t\u1ed1i \u01b0u h\u00f3a c\u1ea5u tr\u00fac h\u00f3a h\u1ecdc c\u1ee7a t\u1ea5m \u0111\u1ed3ng m\u1ea1, nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o <strong>truy\u1ec1n t\u00edn hi\u1ec7u \u0111\u00e1ng tin c\u1eady<\/strong> v\u00e0 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng PCB c\u1ee7a h\u1ecd.<\/p>\n<h3>T\u1ef7 l\u1ec7 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/h3>\n<p>T\u1ed1c \u0111\u1ed9 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m, m\u1ed9t y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a v\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i, \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn \u0111\u1ed9 tin c\u1eady v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a c\u00e1c l\u1edbp ph\u1ee7 \u0111\u1ed3ng trong c\u00e1c \u1ee9ng d\u1ee5ng PCB. Kh\u1ea3 n\u0103ng h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m c\u1ee7a v\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee7a n\u00f3, d\u1eabn \u0111\u1ebfn suy gi\u1ea3m t\u00edn hi\u1ec7u v\u00e0 bi\u1ebfn \u0111\u1ed9ng v\u1ec1 \u0111\u1ed9 tin c\u1eady hi\u1ec7u su\u1ea5t. T\u1ef7 l\u1ec7 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m th\u1ea5p r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 duy tr\u00ec c\u00e1c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n m\u00f4i \u1ed5n \u0111\u1ecbnh, \u0111\u1ea3m b\u1ea3o ch\u1ee9c n\u0103ng l\u00e2u d\u00e0i trong c\u00e1c \u1ee9ng d\u1ee5ng PCB.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: center\">Lo\u1ea1i v\u1eadt li\u1ec7u<\/th>\n<th style=\"text-align: center\">T\u1ef7 l\u1ec7 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m (%)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: center\">FR4<\/td>\n<td style=\"text-align: center\">0.15 &#8211; 0.30<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">FR5<\/td>\n<td style=\"text-align: center\">0.10 &#8211; 0.20<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">Polyimide<\/td>\n<td style=\"text-align: center\">0.05 &#8211; 0.15<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Vi\u1ec7c \u0111\u00e1nh gi\u00e1 \u0111\u00fang t\u1ef7 l\u1ec7 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m l\u00e0 r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i ph\u00f9 h\u1ee3p cho c\u00e1c y\u00eau c\u1ea7u thi\u1ebft k\u1ebf PCB c\u1ee5 th\u1ec3. B\u1eb1ng c\u00e1ch hi\u1ec3u \u0111\u01b0\u1ee3c \u0111\u1eb7c t\u00ednh h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m c\u1ee7a v\u1eadt li\u1ec7u c\u00e1n m\u1ecfng ph\u1ee7 \u0111\u1ed3ng, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u0111\u00e1ng tin c\u1eady c\u1ee7a PCB theo th\u1eddi gian. B\u1ea3ng tr\u00ean minh h\u1ecda t\u1ed1c \u0111\u1ed9 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m kh\u00e1c nhau c\u1ee7a c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u kh\u00e1c nhau, n\u00eau b\u1eadt t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u trong vi\u1ec7c duy tr\u00ec t\u00ednh ch\u1ea5t \u0111i\u1ec7n m\u00f4i \u1ed5n \u0111\u1ecbnh.<\/p>\n<h3>T\u00ednh ch\u1ea5t h\u00fat \u1ea9m<\/h3>\n<p>v\u1ed1n c\u00f3 c\u1ee7a <strong>t\u1ea5m ph\u1ee7 \u0111\u1ed3ng<\/strong> l\u00e0 m\u1ed9t xu h\u01b0\u1edbng <strong>h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/strong>, m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn h\u1ecd <strong>t\u00ednh ch\u1ea5t \u0111i\u1ec7n m\u00f4i<\/strong> v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 trong c\u00e1c \u1ee9ng d\u1ee5ng PCB. C\u00e1i n\u00e0y <strong>t\u00ednh ch\u1ea5t h\u00fat \u1ea9m<\/strong> l\u00e0 m\u1ed9t kh\u00eda c\u1ea1nh quan tr\u1ecdng c\u1ee7a ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u1ea5m laminate, v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn <strong>t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong> v\u00e0 \u0111\u1ed9 tin c\u1eady.<\/p>\n<p>S\u1ef1 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i, d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng kh\u00f4ng th\u1ec3 \u0111o\u00e1n tr\u01b0\u1edbc \u0111\u01b0\u1ee3c. <strong>\u0110\u1eb7c \u0111i\u1ec3m \u0111i\u1ec7n t\u1eeb<\/strong> v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u b\u1ecb t\u1ed5n h\u1ea1i. Do \u0111\u00f3, c\u00e1c t\u1ea5m \u0111\u1ed3ng m\u1ea1 c\u00f3 \u0111\u1ed9 d\u00e0y th\u1ea5p <strong>t\u1ef7 l\u1ec7 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m<\/strong> \u0111\u01b0\u1ee3c \u01b0u ti\u00ean cho <strong>\u1ee9ng d\u1ee5ng hi\u1ec7u su\u1ea5t cao<\/strong>, trong \u0111\u00f3 \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh l\u00e0 t\u1ed1i quan tr\u1ecdng.<\/p>\n<p>Hi\u1ec3u \u0111\u01b0\u1ee3c \u0111\u1eb7c t\u00ednh h\u00fat \u1ea9m c\u1ee7a t\u1ea5m c\u00e1n m\u1ecfng l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 duy tr\u00ec <strong>m\u00e0n th\u1ec3 hi\u1ec7n \u0111\u00e1ng tin, s\u1ef1 th\u1ec3 hi\u1ec7n \u0111\u00e1ng tin<\/strong> t\u0103ng ca. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t ch\u1ec9 \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a t\u1ea5m ph\u1ee7 \u0111\u1ed3ng. B\u1eb1ng c\u00e1ch ki\u1ec3m so\u00e1t s\u1ef1 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m, nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh, c\u1ea7n thi\u1ebft cho c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7u su\u1ea5t cao.<\/p>\n<p>Trong nh\u1eefng m\u00f4i tr\u01b0\u1eddng \u0111\u00f2i h\u1ecfi kh\u1eaft khe n\u00e0y, ngay c\u1ea3 nh\u1eefng thay \u0111\u1ed5i nh\u1ecf trong h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u0169ng c\u00f3 th\u1ec3 g\u00e2y ra h\u1eadu qu\u1ea3 \u0111\u00e1ng k\u1ec3. Do \u0111\u00f3, s\u1ef1 hi\u1ec3u bi\u1ebft th\u1ea5u \u0111\u00e1o v\u1ec1 \u0111\u1eb7c t\u00ednh h\u00fat \u1ea9m l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t c\u1ee7a t\u1ea5m laminate v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady c\u1ee7a PCB trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu \u00e1p l\u1ef1c cao.<\/p>\n<h2>H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u t\u1ea7n s\u1ed1 cao<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/material_selection_for_high_frequency.jpg\" alt=\"l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u cho t\u1ea7n s\u1ed1 cao\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>V\u00ec <strong>hi\u1ec7u su\u1ea5t t\u1ea7n s\u1ed1 cao l\u00fd t\u01b0\u1edfng<\/strong>, l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p <strong>gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> l\u00e0 c\u1ea7n thi\u1ebft v\u00ec ch\u00fang t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp <strong>t\u00ednh to\u00e0n v\u1eb9n v\u00e0 m\u1ea5t t\u00edn hi\u1ec7u<\/strong>.<\/p>\n<p>M\u1ed8T <strong>h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u t\u1ea7n s\u1ed1 cao<\/strong> r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i c\u00f3 gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i th\u1ea5p, r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 truy\u1ec1n t\u00edn hi\u1ec7u t\u1ed1t nh\u1ea5t.<\/p>\n<p>C\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u v\u00e0 hi\u1ec7u su\u1ea5t t\u1ea7n s\u1ed1 cao, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang \u0111\u1ed1i v\u1edbi <strong>PCB t\u1ed1c \u0111\u1ed9 cao<\/strong>.<\/p>\n<p>L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u t\u1ed1t nh\u1ea5t \u0111\u1ea3m b\u1ea3o <strong>m\u1ea5t t\u00edn hi\u1ec7u t\u1ed1i thi\u1ec3u<\/strong> v\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ea7n s\u1ed1 cao hi\u1ec7u qu\u1ea3.<\/p>\n<p>C\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau cung c\u1ea5p ph\u1ea1m vi h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee5 th\u1ec3, cho ph\u00e9p \u0111i\u1ec1u ch\u1ec9nh <strong>gi\u1ea3i ph\u00e1p t\u1ea7n s\u1ed1 cao<\/strong>.<\/p>\n<p>B\u1eb1ng c\u00e1ch hi\u1ec3u c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 t\u1ea1o ra PCB t\u1ed1c \u0111\u1ed9 cao cho nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau, \u0111\u1ea3m b\u1ea3o truy\u1ec1n t\u00edn hi\u1ec7u \u0111\u00e1ng tin c\u1eady v\u00e0 hi\u1ec7u qu\u1ea3.<\/p>\n<p>H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u chi ti\u1ebft h\u1ed7 tr\u1ee3 x\u1eed l\u00fd s\u1ef1 ph\u1ee9c t\u1ea1p c\u1ee7a v\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i, cho ph\u00e9p c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh s\u00e1ng su\u1ed1t \u0111\u1ec3 c\u00f3 hi\u1ec7u su\u1ea5t t\u1ea7n s\u1ed1 cao v\u01b0\u1ee3t tr\u1ed9i.<\/p>\n<h2>\u00dd ngh\u0129a v\u00e0 c\u00e2n nh\u1eafc trong thi\u1ebft k\u1ebf PCB<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/electronics_design_and_layout.jpg\" alt=\"thi\u1ebft k\u1ebf v\u00e0 b\u1ed1 tr\u00ed \u0111i\u1ec7n t\u1eed\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>Khi thi\u1ebft k\u1ebf PCB t\u1ed1c \u0111\u1ed9 cao, c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee7a c\u00e1c l\u1edbp m\u1ea1 \u0111\u1ed3ng ph\u1ea3i \u0111\u01b0\u1ee3c xem x\u00e9t c\u1ea9n th\u1eadn \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 suy gi\u1ea3m t\u00edn hi\u1ec7u v\u00e0 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t cao nh\u1ea5t. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7n s\u1ed1 cao, n\u01a1i t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u v\u00e0 ki\u1ec3m so\u00e1t tr\u1edf kh\u00e1ng l\u00e0 t\u1ed1i quan tr\u1ecdng.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: center\">V\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i<\/th>\n<th style=\"text-align: center\">H\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i (Dk)<\/th>\n<th style=\"text-align: center\">Ki\u1ec3m so\u00e1t tr\u1edf kh\u00e1ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: center\">FR4<\/td>\n<td style=\"text-align: center\">3.3-4.8<\/td>\n<td style=\"text-align: center\">V\u1eeba ph\u1ea3i<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">V\u1eadt li\u1ec7u Dk th\u1ea5p<\/td>\n<td style=\"text-align: center\">2.5-3.0<\/td>\n<td style=\"text-align: center\">Cao<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">V\u1eadt li\u1ec7u t\u1ea7n s\u1ed1 cao<\/td>\n<td style=\"text-align: center\">2.0-2.5<\/td>\n<td style=\"text-align: center\">Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t PCB cao nh\u1ea5t, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf ph\u1ea3i tu\u00e2n th\u1ee7 Nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf PCB c\u00f3 t\u00ednh \u0111\u1ebfn s\u1ef1 thay \u0111\u1ed5i h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i trong c\u00e1c l\u1edbp. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i c\u00f3 gi\u00e1 tr\u1ecb Dk th\u1ea5p \u0111\u1ec3 gi\u1ea3m thi\u1ec3u t\u1ed5n th\u1ea5t ch\u00e8n v\u00e0 \u0111\u1ea3m b\u1ea3o tr\u1edf kh\u00e1ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t. B\u1eb1ng c\u00e1ch \u0111\u00f3, c\u00e1c h\u1ea1n ch\u1ebf v\u1ec1 thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a t\u00edn hi\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c duy tr\u00ec.<\/p>\n<p>Trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7n s\u1ed1 cao, vi\u1ec7c ki\u1ec3m so\u00e1t tr\u1edf kh\u00e1ng l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 suy gi\u1ea3m t\u00edn hi\u1ec7u. Vi\u1ec7c \u0111o v\u00e0 ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t c\u1ee7a PCB. B\u1eb1ng c\u00e1ch xem x\u00e9t c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee7a t\u1ea5m ph\u1ee7 \u0111\u1ed3ng, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf c\u00f3 th\u1ec3 t\u1ea1o ra PCB hi\u1ec7u su\u1ea5t cao \u0111\u00e1p \u1ee9ng nhu c\u1ea7u thi\u1ebft k\u1ebf t\u1ed1c \u0111\u1ed9 cao.<\/p>\n<h2>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>Gi\u00e1 tr\u1ecb c\u1ee7a h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee7a \u0111\u1ed3ng l\u00e0 g\u00ec?<\/h3>\n<p>\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 m\u1ea1ch \u0111i\u1ec7n t\u1eed 90% d\u1ef1a v\u00e0o \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n \u0111\u1eb7c bi\u1ec7t c\u1ee7a \u0111\u1ed3ng. V\u1ec1 <strong>h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> c\u1ee7a \u0111\u1ed3ng, n\u00f3 x\u1ea5p x\u1ec9 1, th\u1ea5p h\u01a1n r\u00f5 r\u1ec7t so v\u1edbi v\u1eadt li\u1ec7u c\u00e1ch \u0111i\u1ec7n.<\/p>\n<p>Gi\u00e1 tr\u1ecb th\u1ea5p n\u00e0y cho th\u1ea5y kh\u1ea3 n\u0103ng l\u01b0u tr\u1eef h\u1ea1n ch\u1ebf c\u1ee7a \u0111\u1ed3ng <strong>n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n<\/strong>, l\u00e0m cho n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t ch\u1ea5t d\u1eabn tuy\u1ec7t v\u1eddi cho hi\u1ec7u qu\u1ea3 <strong>truy\u1ec1n t\u00edn hi\u1ec7u<\/strong>. \u0110\u1eb7c t\u00ednh n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ea1ch \u0111i\u1ec7n t\u1eed t\u1ed1c \u0111\u1ed9 cao v\u00ec n\u00f3 gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t v\u00e0 m\u00e9o t\u00edn hi\u1ec7u.<\/p>\n<h3>H\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee7a \u0111\u1ed3ng Pcb l\u00e0 g\u00ec?<\/h3>\n<p>C\u00e1c <strong>h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> c\u1ee7a PCB \u0111\u1ed3ng, m\u1ed9t th\u00f4ng s\u1ed1 quan tr\u1ecdng trong thi\u1ebft k\u1ebf b\u1ea3ng m\u1ea1ch in, th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng t\u1eeb 3,3 \u0111\u1ebfn 4,8.<\/p>\n<p>S\u1ef1 thay \u0111\u1ed5i n\u00e0y l\u00e0 do c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 ki\u1ec3u d\u1ec7t, h\u00e0m l\u01b0\u1ee3ng nh\u1ef1a v\u00e0 th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u.<\/p>\n<p>Hi\u1ec3u gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i c\u1ee5 th\u1ec3 l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a hi\u1ec7u su\u1ea5t c\u1ee7a PCB, v\u00ec n\u00f3 t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn <strong>t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong> V\u00e0 <strong>nhi\u1ec5u \u0111i\u1ec7n t\u1eeb<\/strong>.<\/p>\n<h3>V\u1eadt li\u1ec7u PCB n\u00e0o c\u00f3 h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i cao?<\/h3>\n<p>Khi l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u PCB, <strong>h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i cao<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c mong mu\u1ed1n cho c\u00e1c \u0111\u1eb7c t\u00ednh truy\u1ec1n t\u00edn hi\u1ec7u v\u00e0 tr\u1edf kh\u00e1ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t.<\/p>\n<p>Trong s\u1ed1 c\u00e1c v\u1eadt li\u1ec7u PCB kh\u00e1c nhau, <strong>t\u1ea5m FR4 c\u00f3 h\u00e0m l\u01b0\u1ee3ng Tg cao<\/strong> th\u01b0\u1eddng bi\u1ec3u hi\u1ec7n h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i cao h\u01a1n, dao \u0111\u1ed9ng t\u1eeb 4,2 \u0111\u1ebfn 4,8.<\/p>\n<p>Ngo\u00e0i ra, m\u1ed9t s\u1ed1 t\u1ea5m ph\u1ee7 \u0111\u1ed3ng nh\u1ea5t \u0111\u1ecbnh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 c\u00f3 h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i cao, khi\u1ebfn ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft k\u1ebf c\u1ee5 th\u1ec3.<\/p>\n<p>\u0110\u1eb7c bi\u1ec7t, c\u00e1c t\u1ea5m laminate c\u1ee7a Rogers \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i cao, th\u01b0\u1eddng v\u01b0\u1ee3t qu\u00e1 4,5.<\/p>\n<h3>T\u00ednh ch\u1ea5t \u0111i\u1ec7n m\u00f4i c\u1ee7a \u0111\u1ed3ng l\u00e0 g\u00ec?<\/h3>\n<p>&#039;M\u1ed9t con chim trong tay c\u00f3 gi\u00e1 tr\u1ecb b\u1eb1ng hai con chim trong b\u1ee5i&#039;, nh\u1ea5n m\u1ea1nh t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c hi\u1ec3u \u0111\u1ed3ng <strong>t\u00ednh ch\u1ea5t \u0111i\u1ec7n m\u00f4i<\/strong>.<\/p>\n<p>C\u00e1c <strong>h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i<\/strong> c\u1ee7a \u0111\u1ed3ng x\u1ea5p x\u1ec9 1, m\u1ed9t gi\u00e1 tr\u1ecb th\u1ea5p r\u00f5 r\u1ec7t so v\u1edbi h\u1ea7u h\u1ebft c\u00e1c v\u1eadt li\u1ec7u \u0111i\u1ec7n m\u00f4i.<\/p>\n<p>H\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i th\u1ea5p n\u00e0y r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c gi\u1ea3m thi\u1ec3u m\u1ea5t t\u00edn hi\u1ec7u v\u00e0 nhi\u1ec5u trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7n s\u1ed1 cao, g\u00f3p ph\u1ea7n c\u1ea3i thi\u1ec7n <strong>t\u00ednh to\u00e0n v\u1eb9n t\u00edn hi\u1ec7u<\/strong> v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed1c \u0111\u1ed9 cao trong c\u00e1c m\u1ea1ch \u0111i\u1ec7n t\u1eed.<\/p>","protected":false},"excerpt":{"rendered":"<p>Nh\u1eefng hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc v\u1ec1 c\u00e1c gi\u00e1 tr\u1ecb h\u1eb1ng s\u1ed1 \u0111i\u1ec7n m\u00f4i kh\u00e1c nhau c\u1ee7a c\u00e1c l\u1edbp m\u1ea1 \u0111\u1ed3ng v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang \u0111\u1ebfn hi\u1ec7u su\u1ea5t PCB \u0111ang ch\u1edd \u0111\u01b0\u1ee3c kh\u00e1m ph\u00e1.<\/p>","protected":false},"author":9,"featured_media":1842,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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Lau","author_link":"https:\/\/tryvary.com\/vi\/author\/wsbpmbzuog4q\/"},"uagb_comment_info":0,"uagb_excerpt":"Insights into the varying dielectric constant values of copper clad laminates and their impact on PCB performance await 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