Printed circuit boards (PCBs) yog cov neeg tsis paub txog kev siv tshuab niaj hnub, muab kev ua haujlwm rau cov khoom siv hluav taws xob uas peb siv txhua hnub. Thaum lawv cov kev ua haujlwm sab hauv yog lub ntsiab lus kub, ib qho tshwj xeeb yog feem ntau tsis saib xyuas - lawv cov xim. Koj puas tau xav paub vim li cas PCBs feem ntau yog xim ntsuab? Nyob rau hauv no blog, peb mam li delve rau hauv keeb kwm, technical, thiab cov tswv yim yam uas tau coj mus rau lub koob meej ntawm ntsuab PCBs.
Keeb kwm keeb kwm:
Yuav kom nkag siab tias yog vim li cas ntsuab tau los ua xim xaiv rau PCBs, peb yuav tsum rov qab mus rau lub xyoo pua nees nkaum. Thaum ntxov PCBs tau tsim los siv lub substrate hu ua Bakelite, cov khoom siv insulating nrog cov xim xim av. Txawm li cas los xij, raws li thev naus laus zis tau txhim kho, kev lag luam tau hloov mus rau qhov kev xaiv zoo dua thiab pom kev txaus siab.
Mus ntsuab:
Hauv xyoo 1960, kev lag luam hluav taws xob tau pib siv epoxy resin ua cov khoom siv substrate vim nws cov hluav taws xob zoo heev thiab cov khoom siv kho tshuab. Cov resins no kuj muaj qhov zoo dua ntxiv - muaj peev xwm ua xim. Ntsuab yog xim ntawm kev xaiv tsuas yog vim nws pheej yig thiab yooj yim rau cov neeg tsim khoom. Muab qhov zoo nkauj tiav kov rau PCB los ntawm kev npog cov kab tooj liab nrog ntsuab solder mask number case.
Cov tswv yim xav txog:
Ntxiv nrog rau cov xwm txheej keeb kwm, kev xav txog kev ua tau zoo kuj tau cuam tshuam qhov muaj koob npe ntawm PCBs ntsuab. Cia peb tshawb txog ob qho laj thawj tseem ceeb:
1. Contrast thiab ntse:
Electronics engineers thiab designers xaiv ntsuab vim nws contrasts nrog liab, ib txwm xim ntawm solder mask inks. Qhov sib txawv ntawm kev sib xyaw xim liab thiab ntsuab ua rau nws yooj yim dua los txheeb xyuas cov kev ua yuam kev hauv kev tsim khoom thiab kev sib dhos. Qhov kev pom tseeb ntau ntxiv yuav txo tau qhov ua yuam kev thiab txhim kho tag nrho cov khoom zoo ntawm PCB.
2. Qhov muag nkees:
Lwm qhov laj thawj tom qab xaiv ntsuab tau ua nrog tib neeg yam xws li engineering. Ua hauj lwm nrog cov khoom siv hluav taws xob thiab PCBs yuav tsum tau saib ntau lub sij hawm ntawm kev sib txuas ntawm cov khoom siv hluav taws xob thiab cov khoom me me. Ntsuab yog qhov nyiam vim tias nws yog xim uas txo qhov muag pom thiab mob, tso cai rau cov kws tshaj lij ua haujlwm rau lub sijhawm ntev yam tsis muaj qhov tsis xis nyob lossis tsis muaj qhov tseeb. Cov nyhuv soothing ntawm ntsuab ntawm lub qhov muag ua rau nws zoo tagnrho rau kev siv mus ntev.
Cov kev xaiv niaj hnub:
Thaum ntsuab PCBs tau tswj hwm kev lag luam rau ntau xyoo lawm, kev tsim kho tshiab niaj hnub tau nthuav dav cov palette ntawm PCBs. Niaj hnub no, koj tuaj yeem pom PCBs hauv ntau yam xim, los ntawm xiav thiab liab mus rau dub thiab txawm tias translucent. Cov kev xaiv no hais txog cov ntawv thov tshwj xeeb, kev nyiam ua kom zoo nkauj, lossis cov cim npe tshwj xeeb. Txawm li cas los xij, txawm tias muaj ntau yam kev xaiv muaj, ntsuab tseem yog cov xim uas siv ntau tshaj plaws vim nws cov nqi-zoo, kev paub thiab kev ntseeg tau.
Qhov nrov ntawm PCBs ntsuab tuaj yeem raug ntaus nqi los ntawm kev sib xyaw ua ke ntawm keeb kwm, thev naus laus zis thiab cov tswv yim. Los ntawm nws cov hauv paus hniav thaum ntxov ntawm kev them taus thiab kev nplua nuj ntawm ntsuab epoxy, rau nws qhov pom tseeb thiab txo qhov muag, cov xim tau dhau los ua qhov sib txawv ntawm kev lag luam hluav taws xob. Thaum lub lag luam tam sim no muaj ntau yam xim xaiv, nws muaj kev ruaj ntseg hais tias ntsuab PCBs yuav tseem ua tus thawj coj rau yav tom ntej.
Post lub sij hawm: Aug-23-2023