Yuav ua li cas tsim PCB kev nyab xeeb sib nrug

Muaj ntau qhov chaw uas yuav tsum tau txiav txim siab txog kev nyab xeeb hauv PCB tsim. Ntawm no, lawv tau muab faib ua ob ntu: ib qho yog hluav taws xob cuam tshuam txog kev nyab xeeb, thiab lwm qhov yog qhov tsis muaj hluav taws xob cuam tshuam txog kev nyab xeeb.

1. Hluav taws xob cuam tshuam txog kev nyab xeeb deb

1. Qhov sib nrug ntawm cov xov hlau

Raws li qhov muaj peev xwm ua tiav ntawm cov tuam txhab PCB tseem muaj kev txhawj xeeb, qhov kev ncua deb ntawm cov xov hlau yuav tsum tsis pub tsawg dua 4mil. Kab sib nrug kuj yog qhov kev ncua deb ntawm kab mus rau kab thiab kab mus rau ncoo. Los ntawm kev xav ntau lawm, qhov loj dua qhov zoo dua yog tias muaj kev tso cai, thiab 10mil ntau dua.

2. Pad aperture thiab ncoo dav

Nyob rau hauv cov nqe lus ntawm kev ua tau zoo ntawm mainstream PCB manufacturers, lub ncoo aperture yuav tsum tsis txhob tsawg tshaj li {{{0}}}.2 hli yog hais tias txhua yam drilling yog siv, thiab yuav tsum tsis txhob tsawg tshaj li 4mil yog laser drilling siv. Lub aperture kam rau ua nws txawv me ntsis nyob ntawm seb cov khoom siv ntawm lub rooj tsavxwm. Feem ntau nws tuaj yeem tswj tau hauv 0.05mm, thiab qhov dav ntawm lub ncoo yuav tsum tsis pub tsawg dua 0.2mm.

3. Qhov sib nrug ntawm cov ntaub qhwv

Nyob rau hauv cov nqe lus ntawm kev ua tau zoo ntawm mainstream PCB manufacturers, qhov kev ncua deb ntawm pads yuav tsum tsis txhob tsawg tshaj li 0.2 hli.

4. Qhov kev ncua deb ntawm daim ntawv tooj liab thiab ntug ntawm lub rooj tsavxwm

Qhov kev ncua deb ntawm daim ntawv them tooj liab thiab ntug ntawm lub rooj tsavxwm PCB yuav tsum tsis pub tsawg dua 0.3mm. Raws li tau pom hauv daim duab saum toj no, teeb tsa txoj cai sib nrug ntawm nplooj ntawv Tsim-Cov Cai-Board daim duab qhia.

Yog hais tias ib cheeb tsam loj ntawm tooj liab raug tso, feem ntau yog qhov shrinkage deb ntawm ntug ntawm lub rooj tsavxwm, uas feem ntau yog teem rau 20mil. Hauv PCB tsim thiab tsim kev lag luam, feem ntau, engineers feem ntau nteg qhov loj ntawm tooj liab rau cov neeg kho tshuab kev txiav txim siab nyob rau hauv lub tiav Circuit Court board, los yog kom tsis txhob curling los yog hluav taws xob luv Circuit Court vim tooj liab raug rau ntawm ntug ntawm lub rooj tsavxwm. Lub thaiv yog retracted 20mil txheeb ze rau ntawm ntug ntawm lub rooj tsavxwm es tsis txhob kis tus tooj liab mus rau ntawm ntug ntawm lub rooj tsavxwm. Muaj ntau txoj hauv kev los daws qhov kev poob qis ntawm tooj liab, xws li kos cov txheej txheem khaws cia rau ntawm ntug ntawm lub rooj tsavxwm, thiab tom qab ntawd teeb tsa qhov kev ncua deb ntawm cov tooj liab tso thiab khaws cia. Ntawm no peb qhia txog ib txoj hauv kev yooj yim, uas yog los teeb tsa kev nyab xeeb sib txawv rau cov khoom siv tooj liab. Piv txwv li, qhov kev nyab xeeb nyob deb ntawm tag nrho pawg thawj coj saib yog teem rau 10mil, thiab qhov chaw tooj liab tso rau 20mil. Qhov no tuaj yeem ua tiav cov txiaj ntsig ntawm shrinking ntug ntawm lub rooj tsavxwm los ntawm 20mil. Nyob rau tib lub sijhawm, Tshem tawm cov tooj liab tuag uas yuav tshwm sim hauv lub cuab yeej.

2. Tsis muaj hluav taws xob cuam tshuam txog kev nyab xeeb

(1) Tus cwj pwm dav, qhov siab thiab qhov sib txawv

Tsis muaj kev hloov pauv rau cov ntawv zaj duab xis thaum ua, tshwj tsis yog tias cov cim kab dav nrog D-CODE tsawg dua 0.22mm (8.66mil) yog thickened rau 0.22mm, uas yog, cov tus cim kab dav L=0.22mm (8.66mil), thiab tag nrho cov cim Qhov dav=W1.0mm, qhov siab ntawm tag nrho cov cim H=1.2mm , thiab qhov sib nrug ntawm cov cim D=0.2mm. Thaum cov ntawv nyeem me dua li cov qauv saum toj no, nws yuav plam thaum luam tawm.

(2) Via-rau-via spacing (qhov ntug mus rau qhov ntug)

Qhov kev ncua deb ntawm ntawm (VIA) mus rau ntawm (lub qhov ntug mus rau lub qhov ntug) yog ntau tshaj 8mil.

3. Kev ncua deb ntawm silk screen rau solder ncoo

Kev tshuaj ntsuam luam ntawv tsis raug tso cai los npog cov ntaub qhwv. Vim hais tias yog cov tshuaj ntsuam silk npog cov ntaub qhwv ntsej muag, cov tin yuav tsis raug siv rau thaj tsam silk screen thaum lub sij hawm thov tin, uas yuav cuam tshuam rau lub mounting ntawm cov khoom. Feem ntau, board manufacturers xav tau qhov sib nrug ntawm 8mil. Yog hais tias lub PCB board cheeb tsam yog heev txwv, ib tug 4mil sib nrug yog NW nyuam qhuav txais. Yog tias lub vijtsam txhob lo lo ntxhuav npog lub ncoo thaum lub sijhawm tsim, lub rooj tsavxwm tsim yuav tshem tawm cov ntawv lo lo ntxhuav sab laug ntawm lub ncoo thaum tsim khoom los xyuas kom meej tias lub ncoo yog tinned.

Tau kawg, qhov xwm txheej tshwj xeeb yuav tsum tau txheeb xyuas kom meej thaum lub sijhawm tsim. Qee lub sij hawm cov tshuaj ntsuam txhob lo lo ntxhuav txhob txwm muab tso ze rau ntawm cov ntaub qhwv, vim tias thaum ob lub ncoo nyob ze heev, lub ntsej muag lo lo ntxhuav hauv nruab nrab tuaj yeem tiv thaiv kev sib txuas ntawm qhov sib txuas ntawm luv luv thaum lub sij hawm soldering. Qhov xwm txheej no yog lwm qhov teeb meem.

4. 3D qhov siab thiab kab rov tav qhov sib txawv ntawm cov qauv siv tshuab

Thaum mounting Cheebtsam ntawm PCB, nws yog ib qho tsim nyog yuav tau txiav txim siab seb lawv puas yuav cuam tshuam nrog lwm cov khoom siv hauv cov kab rov tav thiab qhov siab. Yog li ntawd, thaum tsim, nws yog tsim nyog los xav txog tag nrho cov compatibility ntawm lub Cheebtsam, nruab nrab ntawm lub tiav lawm PCB thiab cov khoom plhaub, thiab lub spatial qauv, thiab tseg ib tug nyab xeeb nyob deb ntawm txhua lub hom phiaj los xyuas kom meej tias tsis muaj spatial teeb meem.