Muaj ntau qhov chaw hauvPCB tsimqhov chaw nyab xeeb yuav tsum tau xav txog. Ntawm no, nws yog ib ntus muab faib ua ob pawg: ib qho yog hluav taws xob cuam tshuam txog kev nyab xeeb kev nyab xeeb, lwm qhov tsis yog hluav taws xob cuam tshuam txog kev nyab xeeb.
Hluav taws xob muaj feem xyuam nrog kev nyab xeeb
1.Kev sib nrug ntawm cov xov hlau
Raws li deb raws li kev muaj peev xwm ntawm mainstreamPCB manufacturersmuaj kev txhawj xeeb, qhov tsawg kawg nkaus qhov sib nrug ntawm cov xov hlau yuav tsum tsis pub tsawg dua 4mil. Qhov tsawg kawg ntawm cov xaim nyob deb kuj yog qhov kev ncua deb ntawm cov xaim mus rau xaim thiab xaim mus rau lub ncoo. Los ntawm qhov kev xav ntawm ntau lawm, qhov loj dua qhov zoo dua yog tias ua tau, thiab 10mil yog ib qho.
2.Pad aperture thiab ncoo dav
Nyob rau hauv cov nqe lus ntawm kev muaj peev xwm ntawm mainstream PCB manufacturers, lub aperture ntawm lub ncoo yuav tsum tsis txhob tsawg tshaj li 0.2 hli yog hais tias nws yog mechanically drilled, thiab 4mil yog hais tias nws yog laser drilled. Lub aperture kam rau ua yog txawv me ntsis raws li lub phaj, feem ntau yuav tswj tau nyob rau hauv 0.05mm, qhov tsawg kawg nkaus dav ntawm lub ncoo yuav tsum tsis txhob tsawg tshaj li 0.2 hli.
3.Spacing ntawm lub ncoo
Raws li qhov muaj peev xwm ua tau ntawm cov tuam txhab PCB tseem muaj kev txhawj xeeb, qhov sib nrug ntawm cov ntaub qhwv yuav tsum tsis pub tsawg dua 0.2 hli.
4.Qhov kev ncua deb ntawm tooj liab thiab phaj ntug
Qhov sib nrug ntawm cov tawv tawv tooj liab thiab ntug ntawm lubPCB pawg thawj coj saibyuav tsum tsis pub tsawg tshaj 0.3mm. Ntawm nplooj ntawv Tsim-Cov Cai-Board daim duab qhia, teeb tsa txoj cai sib nrug rau cov khoom no.
Yog tias thaj tsam loj ntawm tooj liab tau muab tso rau, feem ntau yog qhov kev ncua deb ntawm lub phaj thiab ntug, uas feem ntau yog teem rau 20mil. Hauv PCB tsim thiab tsim kev lag luam, nyob rau hauv ib txwm muaj xwm txheej, vim yog kev txiav txim siab ntawm cov khoom siv hluav taws xob ua tiav, los yog kom tsis txhob muaj cov tawv nqaij tooj liab nthuav tawm ntawm ntug ntawm lub rooj tsavxwm tuaj yeem ua rau ntug dov lossis hluav taws xob luv luv, engineers feem ntau yuav kis tau tus kab mob. thaj tsam loj ntawm tooj liab thaiv txheeb ze rau ntawm ntug ntawm lub rooj tsavxwm shrinkage 20mil, es tsis yog daim tawv nqaij tooj liab tau kis mus rau ntawm ntug ntawm lub rooj tsavxwm.
Qhov tooj liab indention no tuaj yeem siv tau ntau txoj hauv kev, xws li kos cov txheej txheem khaws cia raws ntug ntawm lub phaj, thiab tom qab ntawd teeb tsa qhov kev ncua deb ntawm cov tooj liab thiab qhov khaws cia. Ib txoj hauv kev yooj yim tau qhia ntawm no, uas yog, qhov sib txawv ntawm kev nyab xeeb yog teem rau cov khoom siv tooj liab. Piv txwv li, qhov kev nyab xeeb ntawm tag nrho lub rooj tsavxwm yog teem rau 10mil, thiab cov tooj liab tso rau 20mil, uas tuaj yeem ua tiav cov nyhuv ntawm shrinking 20mil sab hauv ntawm ntug ntawm lub rooj tsavxwm thiab tshem tawm cov tooj liab tuag nyob rau hauv lub cuab yeej.
Tsis yog 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 tuaj yeem ua hauv kev ua cov ntawv zaj duab xis, tab sis qhov dav ntawm cov kab ntawm cov cim hauv qab 0.22mm (8.66mil) hauv D-CODE yuav tsum tau bolded rau 0.22mm, uas yog, qhov dav ntawm cov kab ntawm cov cim L = 0.22mm (8.66mil).
Qhov dav ntawm tag nrho cov cim yog W = 1.0mm, qhov siab ntawm tag nrho cov cim yog H = 1.2mm, thiab qhov sib nrug ntawm cov cim yog D = 0.2mm. Thaum cov ntawv nyeem tsawg dua li cov qauv saum toj no, kev luam ntawv yuav plam.
2.Spacing ntawm Vias
Qhov dhau-qhov (VIA) mus txog qhov sib nrug (ntug rau ntug) yuav tsum zoo dua yog ntau dua 8mil
3.Nyob deb ntawm kev tshuaj ntsuam luam ntawv mus rau hauv ncoo
Kev tshuaj ntsuam luam ntawv tsis raug tso cai los npog lub ncoo. Vim tias yog tias lub vijtsam luam ntawv tau them nrog cov ntaub qhwv lub ntsej muag, lub vijtsam luam ntawv yuav tsis nyob ntawm lub tin thaum lub tin yog nyob rau, uas yuav cuam tshuam rau cov khoom mounting. Lub koom haum pawg thawj coj saib xyuas xav kom 8mil sib nrug yuav tsum tau tshwj tseg thiab. Yog tias lub rooj tsavxwm PCB raug txwv hauv cheeb tsam, 4mil qhov sib txawv tsis tau txais. Yog tias qhov kev tshuaj ntsuam luam ntawv tsis raug cuam tshuam rau ntawm lub ncoo thaum tsim, lub phaj Hoobkas yuav tshem tawm qhov kev tshuaj ntsuam luam ntawv ntawm lub ncoo thaum tsim khoom los xyuas kom meej cov tin ntawm lub ncoo.
Ntawm chav kawm, nws yog ib qho teeb meem-los ntawm-cov ntaub ntawv ntawm lub sijhawm tsim. Qee lub sij hawm lub vijtsam luam tawm yog txhob txwm khaws cia ze rau ntawm lub ncoo, vim tias thaum ob lub ncoo nyob ze rau ib leeg, lub vijtsam luam tawm hauv nruab nrab tuaj yeem tiv thaiv kev sib txuas ntawm lub voj voog luv luv thaum vuam, uas yog lwm rooj plaub.
4.Mechanical 3D qhov siab thiab kab rov tav sib nrug
Thaum txhim kho lub Cheebtsam ntawm lubPCB, nws yog ib qho tsim nyog yuav tau txiav txim siab seb qhov kev taw qhia kab rov tav thiab qhov chaw siab yuav tsis sib haum nrog lwm cov qauv siv tshuab. Yog li ntawd, nyob rau hauv tus tsim, peb yuav tsum xav txog tag nrho cov compatibility ntawm lub Cheebtsam, ntawm PCB tiav cov khoom thiab cov khoom plhaub, thiab spatial qauv, thiab khaws cia muaj kev nyab xeeb spacing rau txhua lub hom phiaj khoom los xyuas kom meej tias tsis muaj teeb meem nyob rau hauv qhov chaw.
