CovPCB txheej txheem ntugyog ib tug ntev dawb paug board ntug teem rau txoj kev sib kis txoj hauj lwm thiab qhov chaw ntawm imposition Mark cov ntsiab lus thaum lub sij hawm ua SMT. Qhov dav ntawm cov txheej txheem ntug feem ntau yog li 5-8mm.

Hauv cov txheej txheem tsim PCB, vim qee qhov laj thawj, qhov kev ncua deb ntawm ntug ntawm cov khoom siv thiab sab ntev ntawm PCB yog tsawg dua 5 hli. Txhawm rau kom ntseeg tau tias qhov ua tau zoo thiab qhov zoo ntawm cov txheej txheem sib dhos PCB, tus tsim qauv yuav tsum ntxiv cov txheej txheem ntug mus rau sab ntev ntawm PCB.

PCB txheej txheem ntug kev txiav txim siab:

1. SMD los yog tshuab-ntxig Cheebtsam tsis tuaj yeem npaj rau hauv cov khoom siv tes ua, thiab cov khoom siv ntawm SMD lossis cov khoom siv tshuab tsis tuaj yeem nkag mus rau hauv cov khoom siv tes ua thiab nws qhov chaw sab saud.

2. Qhov chaw ntawm cov khoom siv tes ntxig tsis tuaj yeem poob rau hauv qhov chaw tsis pub dhau 3 hli qhov siab saum cov txheej txheem sab saud thiab qis qis, thiab tsis tuaj yeem poob rau hauv qhov chaw tsis pub dhau 2 hli qhov siab tshaj ntawm cov txheej txheem sab laug thiab sab xis.

3. Lub conductive tooj liab ntawv ci nyob rau hauv cov txheej txheem ntug yuav tsum tau dav li sai tau. Cov kab tsawg dua 0.4 hli yuav tsum tau siv cov rwb thaiv tsev thiab kev tiv thaiv kev puas tsuaj, thiab cov kab ntawm ntug feem ntau tsis tsawg dua 0.8 hli.

4. Cov txheej txheem ntug thiab PCB tuaj yeem txuas nrog lub qhov khoob lossis V-shaped grooves. Feem ntau, V-shaped grooves yog siv.

5. Yuav tsum tsis muaj cov ntaub qhwv thiab los ntawm cov qhov ntawm ntug ntawm cov txheej txheem.

6. Ib lub rooj tsav xwm ib leeg nrog thaj tsam ntau dua 80 mm² xav kom PCB nws tus kheej muaj ib khub ntawm cov txheej txheem sib luag, thiab tsis muaj cov khoom siv lub cev nkag mus rau sab sauv thiab qis ntawm cov txheej txheem ntug.

7. Qhov dav ntawm cov txheej txheem ntug tuaj yeem tsim nyog nce raws li qhov xwm txheej tiag tiag.