Printed Circuit Boards (PCBs) yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob niaj hnub no. Lawv ua lub hauv paus ntawm cov khoom siv hluav taws xob, muab lub platform rau kev sib txuas ntawm cov khoom siv hluav taws xob.Tooj liab yog ib qho khoom siv hluav taws xob zoo heev thiab siv dav hauv kev tsim PCB.
Hauv kev tsim cov txheej txheem ntawm PCB, tooj liab hnyav ua lub luag haujlwm tseem ceeb.Qhov hnyav tooj liab yog hais txog qhov tuab lossis ntau npaum li cas ntawm tooj liab siv rau saum npoo ntawm lub rooj tsavxwm. Qhov hnyav ntawm tooj liab siv hauv PCB kev tsim khoom ncaj qha cuam tshuam rau hluav taws xob thiab khoom siv hluav taws xob ntawm lub rooj tsavxwm. Hauv qhov blog no, peb yuav tshawb xyuas qhov sib txawv ntawm qhov hnyav tooj liab siv hauv kev tsim khoom PCB thiab lawv qhov tseem ceeb.
Nkag siab txog tooj liab hnyav hauv PCB Manufacturing
Qhov hnyav ntawm tooj liab feem ntau ntsuas hauv ounces ib square feet (oz / ft²). Feem ntau siv tooj liab hnyav hauv PCB raug tsim los ntawm 0.5 oz / square feet (17 µm) txog 3 oz / square feet (105 µm). Cov luj no txiav txim siab tooj liab tuab ntawm PCB txheej txheej, txheej sab hauv, thiab plated tooj liab qhov.
Kev xaiv ntawm qhov hnyav ntawm tooj liab nyob ntawm seb yam xws li kev ua haujlwm hluav taws xob xav tau, lub zog siv tshuab thiab tus nqi. Wb cia
Ua tib zoo saib qhov sib txawv ntawm qhov hnyav tooj liab thiab lawv cov ntawv thov hauv PCB kev tsim khoom.
1.0.5 oz/ft2 (17 µm) Copper Nyhav:
Qhov no yog qhov hnyav tshaj plaws tooj liab siv hauv kev tsim PCB. Nws feem ntau yog siv rau hauv daim ntawv thov PCB yooj yim thiab hnav. Cov boards no feem ntau siv rau hauv cov khoom siv hluav taws xob uas tus nqi thiab qhov hnyav yog qhov tseem ceeb rau kev txiav txim siab. Txawm li cas los xij, txo qhov tuab ntawm tooj liab cuam tshuam rau lub peev xwm nqa cov dej ntws siab thiab tuaj yeem ua rau muaj zog tiv thaiv.
2.1 oz/square feet (35 µm) tooj liab qhov hnyav:
Qhov no yog qhov hnyav tshaj plaws siv tooj liab hauv kev tsim PCB. Nws cuam tshuam qhov sib npaug ntawm kev ua haujlwm thiab kev siv nyiaj txiag. PCBs nrog 1 oz / sq. ft. tooj liab qhov hnyav tuaj yeem tswj tau qhov nruab nrab tam sim no thiab zoo tagnrho rau ntau yam kev siv, suav nrog kev sib txuas lus, tsheb thiab khoom siv hluav taws xob.
3. 2 oz / square feet (70 µm) tooj liab qhov hnyav:
Raws li qhov kev thov kom muaj peev xwm nqa tau ntau dua, PCBs nrog qhov hnyav ntawm 2 ooj / square feet ua qhov tseem ceeb. Paub txog lawv qhov kev txhim kho thermal conductivity, cov laug cam no feem ntau siv hauv hluav taws xob hluav taws xob, lub tshuab hluav taws xob siab, UPS systems thiab lwm yam kev siv uas yuav tsum muaj peev xwm nqa tau tam sim no.
4.3 oz/ft2 (105 µm) Copper Nyhav:
PCBs nrog qhov hnyav tooj liab ntawm 3 ooj ib square feet yog suav tias yog cov tooj liab hnyav. Cov laug cam no yog siv rau hauv daim ntawv thov uas yuav tsum tau muaj peev xwm nqa tau loj tam sim no lossis ua kom muaj cua sov zoo dua. Qee qhov piv txwv suav nrog cov tshuab hluav taws xob faib hluav taws xob, cov roj teeb siab tam sim no, thiab cov tswj lub cev muaj zog.
Qhov tseem ceeb ntawm tooj liab hnyav hauv PCB Manufacturing
Xaiv qhov hnyav tooj liab uas tsim nyog yog qhov tseem ceeb los xyuas kom meej PCB kev ua tau zoo thiab kev ntseeg tau. Nov yog qee qhov tseem ceeb uas qhia txog qhov tseem ceeb ntawm qhov hnyav tooj liab:
1. Kev ua haujlwm hluav taws xob:
Qhov hnyav tooj liab txiav txim siab PCB lub peev xwm nqa tam sim no yam tsis muaj kev tsim tawm ntau dhau. Tsis txaus tooj liab thickness tuaj yeem ua rau muaj zog tiv thaiv, ua rau muaj hluav taws xob poob thiab board overheating. Ntawm qhov tod tes, qhov hnyav dua tooj liab tso cai rau kev tuav tam sim no zoo dua thiab qis dua.
2. Mechanical zog:
Ntxiv nrog rau kev ua hluav taws xob ua hluav taws xob, tooj liab kuj tseem muab cov cuab yeej cuab tam rau PCB. Qhov hnyav tooj liab zoo ntxiv lub zog thiab ua haujlwm ntev rau lub rooj tsav xwm hauv Circuit Court, tso cai rau nws los tiv thaiv kev khoov, warping, lossis lwm yam kev ntxhov siab ntawm lub cev.
3. Thermal tswj:
Tooj yog ib qho zoo heev conductor ntawm tshav kub. Qhov hnyav tooj liab txaus pab kom muaj txiaj ntsig zoo ntawm cov cua sov uas tsim los ntawm cov khoom siv rau ntawm PCB. Qhov no tiv thaiv thermal stress los yog tivthaiv tsis ua hauj lwm vim overheating, ua kom lub neej ntev thiab kev ntseeg siab ntawm lub rooj tsavxwm.
4. Txoj kab dav dav thiab qhov sib txawv:
Qhov hnyav tooj liab cuam tshuam cov kab dav dav thiab qhov sib txawv ntawm cov txheej txheem hauv PCB layout thiab tsim. Qhov hnyav tooj liab ntau dua yuav tsum muaj qhov dav dav thiab qhov sib txawv kom tso cai rau cov dej ntws tau zoo thiab tsis txhob muaj qhov kub thiab txias ntau dhau.
Hauv kev xaus
Hauv cov ntsiab lus,xaiv qhov hnyav tooj liab yog qhov tseem ceeb rau kev tsim lub PCB ua haujlwm siab thiab txhim khu kev qha.Kev xaiv yog nyob ntawm cov kev cai tshwj xeeb ntawm daim ntawv thov, suav nrog kev ua haujlwm hluav taws xob, kev siv lub zog thiab kev tswj xyuas thermal. Txawm hais tias nws yog cov neeg siv khoom siv hluav taws xob hnyav lossis cov ntawv siv hluav taws xob muaj zog, tooj liab hnyav ua lub luag haujlwm tseem ceeb hauv kev tsim khoom PCB thiab yuav tsum tau ua tib zoo txiav txim siab thaum lub sijhawm tsim.
Post lub sij hawm: Oct-12-2023
Rov qab
