Dab Tsi Cov Teeb Meem Kev Nyab Xeeb Kev Nyab Xeeb Ntsib Hauv PCB Tsim

Peb yuav pom ntau yam teeb meem kev nyab xeeb hauv kev tsim qauv hauv PCB, xws li kev paub meej ntawm vias thiab pads, qhov sib nrug ntawm ib co kab yog txhua qhov chaw uas peb yuav tsum xav txog. Yog li niaj hnub no peb faib cov qhov yuav tsum tau sib txawv no ua ob hom, qhov ib yog hluav taws xob kev tiv thaiv kev nyab xeeb, lwm qhov yog qhov tsis raug hluav taws xob tiv thaiv.

1. Hluav taws xob kev nyab xeeb deb

(1) Sib nrug ntawm cov xov hlau

Raws li cov peev xwm tsim tawm ntawm cov tuam ntxhab PCB, qhov kev ncua deb ntawm cov khoom siv yuav tsum tsis pub tsawg dua 4 MIL. Qhov tsawg kawg kab kis nrug kuj yog kab-rau-kab thiab kab-rau-ncov spacing. Los ntawm qhov pom ntawm peb kev tsim khoom, nws yog qhov zoo dua kom muaj lub dav loj dua hauv cov xwm txheej. Qhov dav dav 10 MIL yog qhov ntau dua.

(2) Ncoo aperture thiab pad dav

Raws li cov chaw tsim tshuaj paus PCB, qhov tsawg kawg ntawm kab uas hla ntawm lub ntsuas phoo yuav tsum yog yam tsawg 0. 2 hli yog tias nws yog kev siv tshuab, thiab nws yuav tsum tsis pub tsawg dua li {{{2}} mil yog tias nws yog laser drilled. Lub aperture kam rau ua yog txawv me ntsis nyob ntawm lub rooj tsavxwm. Feem ntau nws tuaj yeem tswj tsis pub dhau 0. 05 hli. Qhov dav ntawm pawg tswj hwm yuav tsum tsis pub tsawg dua 0. 2 hli.

(3) Qhov kis ntawm pads

Raws li kev ua tiav ntawm cov peev txheej ntawm PCB cov chaw tsim khoom, qhov kev ncua deb ntawm cov pawm yuav tsum tsis pub tsawg dua 0. 2 MM.

(4) Qhov kev ncua deb ntawm daim tawv nqaij tooj liab thiab ntawm ntug ntawm pawg thawj coj

Qhov kev ncua deb ntawm daim tawv tooj liab thiab cov ntug ntawm PCB pawg thawj coj yog qhov zoo dua tsis pub tsawg tshaj 0. 3 hli. Yog tias tooj liab tso rau ntawm qhov chaw loj, nws yog feem ntau tsim nyog yuav tsum muaj shrinkage nrug los ntawm ntug ntawm lub rooj tsavxwm, uas feem ntau tau teeb tsa kom 20 mil. Nyob rau hauv ib txwm muaj xwm txheej, rau kev siv tshuab ntawm kev txiav txim siab ntawm lub rooj sib txig sib xyaw ua tiav, lossis kom zam kev muaj peev xwm txiav lossis hluav taws xob luv luv tshwm sim los ntawm cov tooj liab tshwm sim rau ntawm ntug ntawm lub rooj tsavxwm, cov kws tsim hluav taws xob feem ntau ua kom thaj chaw loj tooj liab los ntawm {{2} } mil txheeb ze rau ntawm ntug. Daim tawv tooj liab tsis yog ib txwm kis mus rau ntawm ntug ntawm pawg thawj coj. Muaj ntau txoj hauv kev los cuam tshuam nrog tooj liab shrinkage. Piv txwv, kos cov txheej kom ruaj khov ntawm ntug kav, thiab tom qab ntawd teeb tsa qhov kev ncua deb ntawm tooj liab thiab kev khaws tseg.

2. Qhov tsis yog hluav taws xob kom deb

(1) Dav, qhov siab thiab dav ntawm cov cim

Peb feem ntau siv cov nqi sib npaug rau cov cim luam tawm ntawm lub vijtsam. Vim tias thaum cov ntawv nyeem tsawg dhau, nws yuav raug plooj tom qab kev ua haujlwm thiab luam ntawv.

(2) Qhov deb ntawm silk screen rau ncoo

Tshuaj ntsuam tshuab luam ntawv tsis tso cai rau ntawm cov ntaub qhwv. Yog tias qhov tshuaj ntsuam xov lo lo ntxhuav nrog cov ntaub qhwv, lub voos yuav tsis muab tinned thaum soldering, uas yuav cuam tshuam qhov kev tso kawm ntawm cov khoom sib txuas. Cov tuam txhab tsim khoom lag luam dav dav xav tau 8 mil yov tsum tshwj tseg. Yog tias nws yog vim tias thaj tsam ntawm qee qhov kev ua PCB sab yog ze heev, peb tuaj yeem nyuam qhuav txais 4 MIL. Tom qab ntawd, yog tias qhov tshuaj ntsuam qhov silk lo lus npog nrog lub ncoo thaum tsim, tus thawj tswj hwm lub vaj huam sib luag yuav txiav tawm cov nplaim lo lo ntxhuav feem sab laug ntawm daim ntaub thaum lub sijhawm tsim khoom kom ntseeg tau tin ntawm lub ncoo. Yog li peb yuav tsum tau them sai sai rau nws.

(3) 3 D qhov siab thiab kab rov tav rau ntawm cov qauv kho tshuab

Thaum muab cov cuab yeej txuas rau ntawm PCB, nws yog qhov yuav tsum tau txiav txim siab seb puas yuav muaj teeb meem nrog lwm cov qauv kho tshuab hauv kab rov tav thiab qhov siab ntawm qhov chaw. Yog li no, thaum tsim qauv, nws yog qhov yuav tsum tau ua tib zoo xav txog kev yoog raws qhov qauv ntawm qhov sib txawv, thiab ntawm cov tiav ntawm PCB thiab lub plhaub khoom, thiab tseg qhov chaw nyob nyab xeeb rau txhua lub hom phiaj.