Tsim kab dav thiab qhov sib txawv cov qauv rau kev siv PCB boards

Cov kab dav dav thiab qhov sib txawv ntawm cov txheej txheem PCB boards yuav tsum nruj me ntsis ua raws li IPC -2221 kev lag luam tus qauv tsim qauv specifications, thaum teeb tsa cov qauv ntsuas raws li lub Hoobkas cov txheej txheem kev muaj peev xwm, suav nrog kev tsim cov khoom tsim tawm thiab tsim kev ua tau zoo. Cov txheej txheem kev nyab xeeb dav dav rau cov neeg pej xeem thiab cov teeb liab muaj teeb meem hauv kev lag luam yog tias txoj kab dav thiab qhov sib nrug yuav tsum tsis pub tsawg dua 0.15mm (6mil). Qhov kev ntsuas no tsim nyog rau kev tsim khoom ntawm feem ntau ntawm ob - txheej thiab plaub txheej txheej txheej txheej txheej txheem, nrog rau kev tswj tau ntev thiab tsis tshua muaj kev cuam tshuam xws li xaim tawg thiab kev sib txuas ntawm tin. Qhov tsawg kawg nkaus tso cai kab dav thiab qhov sib nrug rau cov txheej txheem cov txheej txheem sib xyaw ua ke yog 0.10mm (4mil), uas tsuas yog tsim nyog rau siab - qhov sib txuas xov tooj ceev; High precision sheet hlau cia siab rau cov txheej txheem siab kom ua tiav qhov siab tshaj plaws kab dav thiab qhov sib txawv ntawm 0.05mm (2mil), tab sis yuav tsum muaj cov txheej txheem tsim khoom tshwj xeeb thiab kev tswj xyuas nruj. Hauv kev tsim R & D txhua hnub, nws raug nquahu kom siv cov kev txwv tsis pub siv rau cov kev cai tshwj xeeb kom tsis txhob muaj qhov nce ntawm cov khoom tsim tawm los ntawm qhov loj me.

Cov kab dav tsim ntawm cov kab nqa tam sim no muaj cov qauv kev ua haujlwm zoo sib xws, thiab cov tub ntxhais yog kho raws li cov ntawv ci tooj liab tuab, ua haujlwm tam sim no, thiab qhov kub thiab txias yuav tsum tau ua. Nyob rau hauv ib txwm kub kub, lub ntsiab 1OZ tooj liab ntawv ci daim ntawv nyob rau hauv kev lag luam yog haum rau tsawg tam sim no teeb liab circuits nrog ib tug kab dav ntawm tshaj 0.2mm rau 100mA, thiab ib tug kab dav tsis tsawg tshaj li 0.4mm rau 500mA tam sim no circuits. Tus qauv kab dav rau cov pa 1A fais fab mov kab yog teem rau ntawm 0.6mm los yog ntau tshaj, thiab rau 2A siab tam sim no kab, nws yuav tsum tau widened rau 1.0mm los yog ntau tshaj. Rau 5A thiab siab dua cov hluav taws xob hluav taws xob, nws raug nquahu kom siv loj - thaj tsam tooj liab nteg lossis ntau qhov kev sib txuas txuas. Cov ntawv tuab tooj liab tuaj yeem raug txo kom tsim nyog hauv kab dav qhov loj me, thiab cov npoo kev nyab xeeb txaus yuav tsum tau tshwj tseg thaum tsim kom tsis txhob muaj qhov kub thiab txias thiab Circuit Court aging thiab melting teeb meem tshwm sim los ntawm lub sij hawm ntev - lub sij hawm ua hauj lwm tag nrho ntawm lub voj voog. Nyob rau tib lub sijhawm, qhov kev ncua deb ntawm cov kab hluav taws xob yuav tsum yog me ntsis loj dua li cov kab teeb liab zoo tib yam los tiv thaiv electromagnetic coupling cuam tshuam nyob rau hauv kev ua haujlwm siab tam sim no thiab xyuas kom ruaj khov ntawm lub zog hluav taws xob.

Kev tsim kab sib nrug hauv qhov siab - qhov hluav taws xob rwb thaiv tsev yog qhov tseem ceeb ntawm cov cai tswj kev nyab xeeb, thiab nws yog ib qho tsim nyog yuav tsum nruj me ntsis qhov txawv ntawm cov txheej txheem sab hauv thiab txheej txheej sib nrug raws li qib voltage. Tsawg voltage teeb liab circuits, cov pa 5V, 12V, 24V tswj circuits, thiab ib txoj kab kev nyab xeeb ntawm 0.15mm ntawm cov kab tuaj yeem ua tau raws li qhov yuav tsum tau muaj rwb thaiv tsev; Nyob rau hauv ib txwm muaj hluav taws xob ntawm AC 220V, qhov tsawg kawg ntawm kab sib nrug ntawm cov txheej txheej sab hauv yuav tsum tsis pub tsawg dua 0.2 hli, thiab cov kab sib nrug ntawm cov txheej txheej sab nraud yuav tsum tau nce mus rau 1.25mm lossis ntau dua. Hauv qhov siab- qhov siab qhov siab tsis muaj qhov sib txawv, qhov sib nrug yuav tsum tau nthuav dav ntxiv. Rau siab voltage tej yam kev mob ntawm 380V thiab saum toj no, nws yog ib qhov tsim nyog yuav tsum tau nce lub creepage nrug thiab hluav taws xob clearance raws li cov qauv, thiab nruj me ntsis tswj cov ciam teb kab nrug ntawm high thiab tsawg voltage zones nyob rau hauv ib tug graded yam. Tsis tas li ntawd, qhov sib nrug ntawm lub voj voog, cov ntaub qhwv ntsej muag, thiab cov vias yuav tsum ua raws li cov qauv kev sib koom ua ke kom tshem tawm cov kev phom sij zais cia ntawm arcing, to, thiab luv luv Circuit Court los ntawm qhov chaw me me, thiab ua kom haum rau kev nyab xeeb siv cov qauv ntawm ntau yam PCBs xws li kev lag luam tswj, khoom siv hluav taws xob, thiab kev tswj hluav taws xob zoo.