Printed circuit boards (PCBs) yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob niaj hnub no, ua lub hauv paus ntawm cov khoom siv thiab kev sib txuas uas tso cai rau cov khoom siv hluav taws xob ua haujlwm tau zoo. PCB manufacturing, tseem hu ua PCB fabrication, yog ib tug complex txheej txheem uas muaj ntau theem ntawm pib tsim mus rau zaum kawg los ua ke. Hauv cov ntawv blog no, peb yuav ua qhov tob tob rau hauv cov txheej txheem tsim khoom PCB, tshawb xyuas txhua kauj ruam thiab nws qhov tseem ceeb.
1. Tsim thiab layout
Thawj kauj ruam hauv kev tsim PCB yog tsim lub rooj tsav xwm txheej txheem. Cov kws tsim qauv siv computer-aided design (CAD) software los tsim cov duab kos qhia txog kev sib txuas thiab qhov chaw ntawm cov khoom. Layout suav nrog kev ua kom zoo ntawm qhov chaw ntawm cov kab, cov ntaub qhwv, thiab vias kom ntseeg tau tias muaj kev cuam tshuam tsawg thiab ua haujlwm tau zoo.
2. Kev xaiv cov khoom siv
Kev xaiv cov khoom siv PCB yog qhov tseem ceeb rau nws qhov kev ua tau zoo thiab kav ntev. Cov ntaub ntawv muaj xws li fiberglass reinforced epoxy laminate, feem ntau hu ua FR-4. Cov txheej tooj liab ntawm lub rooj tsav xwm Circuit Court yog qhov tseem ceeb rau kev ua hluav taws xob. Lub thickness thiab zoo ntawm tooj liab siv nyob ntawm seb cov kev cai tshwj xeeb ntawm Circuit Court.
3. Npaj lub substrate
Thaum cov txheej txheem tsim tau txiav txim siab thiab cov khoom siv tau xaiv, cov txheej txheem tsim khoom pib los ntawm kev txiav cov substrate mus rau qhov loj me. Tom qab ntawd lub substrate yog ntxuav thiab coated nrog ib txheej ntawm tooj liab, ua lub hauv paus rau cov conductive paths.
4. Etching
Tom qab npaj lub substrate, cov kauj ruam tom ntej yog tshem tawm cov tooj liab ntau dhau ntawm lub rooj tsavxwm. Cov txheej txheem no, hu ua etching, yog ua tiav los ntawm kev siv cov khoom siv acid-resistant hu ua daim npog ntsej muag los tiv thaiv cov kab uas xav tau tooj liab. Tom qab ntawd, qhov chaw uas tsis tau npog yog raug rau ib qho kev daws teeb meem, uas dissolves cov pliaj tsis xav tau, tawm hauv txoj kev xav tau xwb.
5. Drilling
Drilling suav nrog kev tsim cov qhov lossis vias hauv lub substrate kom tso cai rau kev tso kawm thiab hluav taws xob sib txuas ntawm cov txheej txheem sib txawv ntawm lub rooj tsavxwm. High-speed drilling tshuab nruab nrog precision laum khoom tuaj yeem tshuab cov qhov me me no. Tom qab cov txheej txheem drilling tiav, lub qhov yog plated nrog cov khoom siv hluav taws xob kom ntseeg tau tias muaj kev sib txuas zoo.
6. Plating thiab solder daim npog qhov ncauj
Cov drilled boards yog plated nrog ib txheej nyias ntawm tooj liab kom ntxiv dag zog rau kev sib txuas thiab muab kev nyab xeeb rau cov khoom siv. Tom qab plating, ib daim npog ntsej muag yog siv los tiv thaiv cov kab tooj liab los ntawm oxidation thiab txheeb xyuas thaj tsam ntawm cov solder. Cov xim ntawm daim npog ntsej muag feem ntau yog ntsuab, tab sis yuav txawv raws li cov chaw tsim khoom nyiam.
7. Cov khoom tso rau hauv
Hauv cov kauj ruam no, cov khoom siv PCB tau ntim nrog cov khoom siv hluav taws xob. Cov khoom siv tau ua tib zoo ntsia rau ntawm cov ntaub qhwv kom ntseeg tau tias qhov kev sib raug zoo thiab kev taw qhia. Cov txheej txheem feem ntau yog automated siv cov tshuab tuaj tos kom paub tseeb thiab ua haujlwm tau zoo.
8. Vuam
Soldering yog cov kauj ruam kawg hauv kev tsim khoom PCB. Nws suav nrog cov khoom cua sov thiab cov ntaub qhwv los tsim kom muaj kev sib txuas hluav taws xob muaj zog thiab txhim khu kev qha. Qhov no tuaj yeem ua tiav siv lub tshuab nthwv dej, qhov twg lub rooj tsavxwm dhau los ntawm nthwv dej ntawm molten solder, lossis los ntawm phau ntawv qhia cov txheej txheem rau cov khoom siv.
Cov txheej txheem tsim khoom PCB yog txheej txheem txheej txheem uas muaj ntau theem ntawm kev hloov tus qauv tsim rau hauv lub rooj tsav xwm ua haujlwm. Los ntawm qhov pib tsim thiab layout mus rau qhov chaw tso thiab soldering, txhua kauj ruam ua rau tag nrho cov functionality thiab kev ntseeg siab ntawm PCB. Los ntawm kev nkag siab txog cov ntsiab lus sib txawv ntawm cov txheej txheem tsim khoom, peb tuaj yeem txaus siab rau cov txheej txheem thev naus laus zis uas tau ua cov khoom siv hluav taws xob niaj hnub me me, sai dua, thiab ua haujlwm zoo dua.
Post lub sij hawm: Sep-18-2023