Kev tsom xam ntawm PCB Txheej Deviation

Raws li qhov ceev ntawm Integrated Circuit Court ntim nce, cov kab sib txuas sib txuas tau muaj zog heev, ua rau ntau txheej Circuit Court boards dav siv. Multilayer circuit boards yog tsim los ntawm cov txheej txheem hauv Circuit Court boards, semi-kho nplooj ntawv, thiab txheej txheej tooj liab, uas tau nias ua ke los ntawm cov txheej txheem kub thiab kub siab ntawm cov xovxwm, thiab tom qab ntawd txuas rau txhua txheej ntawm Circuit Court los ntawm- qhov kom ua tiav lawv cov kev ua haujlwm hluav taws xob. Qhov no yuav tsum muaj qhov tseeb siab nyob rau hauv qhov txheeb ze ntawm cov ntsiab lus sib tshooj thiab qhov ntawm cov ntawv ci tooj liab hauv txhua txheej ntawm lub voj voog, txwv tsis pub qhov sib txawv tseem ceeb yuav ua rau cov khoom luv luv lossis qhib Circuit Court scrapping. Yog li ntawd, kev ua tiav qhov kev sib raug zoo ntawm cov khaubncaws sab nraud povtseg yog qhov tseem ceeb rau ntau txheej txheej Circuit Court boards.

General txhais ntawm PCB board txheej deviation:

Layer deviation yog hais txog qhov sib txawv ntawm concentricity ntawm cov khaubncaws sab nraud povtseg ntawm PCB pawg thawj coj saib uas yuav tsum tau ua tib zoo sib xws. Lub peev xwm ntawm cov kev xav tau yog tswj raws li cov qauv tsim ntawm ntau hom PCB pawg thawj coj saib. Qhov me me ntawm qhov kev ncua deb ntawm nws lub qhov thiab tooj liab, qhov kev tswj nruj dua kom ntseeg tau tias nws muaj peev xwm ua tau thiab dhau tam sim no.

Cov txheej txheem uas nquag siv los txheeb xyuas cov txheej txheem sib txawv hauv cov txheej txheem tsim khoom yog:

Txoj kev siv feem ntau nyob rau hauv kev lag luam yog ntxiv ib txheej ntawm concentric voj voog ntawm txhua lub ces kaum ntawm lub rooj tsavxwm ntau lawm, thiab teem caij sib nrug ntawm lub voj voog concentric raws li qhov sib txawv ntawm cov txheej txheem tsim khoom. Thaum lub sij hawm tsim cov txheej txheem, qhov sib txawv ntawm lub voj voog concentric raug tshuaj xyuas los ntawm X-ray tshuaj xyuas tshuab lossis X-ray drilling lub hom phiaj tshuab kom paub meej tias lawv cov txheej txheem sib txawv.

Kev paub txog kev sib raug zoo ntawm cov khaubncaws sab nraud povtseg yog ib qho chaw tseem ceeb tshaj plaws rau ntau txheej txheej Circuit Court board. Txawm li cas los xij, muaj ntau yam cuam tshuam rau kev sib raug zoo ntawm cov khaubncaws sab nraud povtseg, feem ntau suav nrog kev sib txawv ntawm qhov sib txawv ntawm cov txheej hauv Circuit Court core boards, PE punching raug, board shrinkage, nias sib txawv, drilling raug, thiab lwm yam. Cov xwm txheej ntawm cov xovxwm yog nquag mus rau txheej sib txawv thiab scrapping, thiab vim li cas rau qhov sib txawv yog qhov nyuaj kom paub meej vim tias lub phaj twb tau nias lawm.

Cov txheej txheem lamination yog cov txheej txheem ntawm lub cev thiab tshuaj lom neeg cov tshuaj tiv thaiv, thiab kev sib txuam ntawm cov phaj nias yog qhov tseem ceeb. Nws yog ib qho tsim nyog yuav tsum tau ua raws li cov txheej txheem lamination "kub, siab, thiab lub sijhawm". Rau ntau theem siab compression txoj kev, ua ntej, nyob rau hauv thaum ntxov theem ntawm cua sov, cov resin maj mam pib yaj thaum rhuab, thiab lub viscosity txo qis ua ntej mus txog rau tag nrho cov ntws theem. Lub siab qis yuav tsum tau muab los xyuas kom meej tias cov resin uas pib yaj tag nrho hu rau coarsened tooj liab nto, uas feem ntau hu ua kev sib cuag siab. Tom qab ntawd, cov resin pib ntws thiab solidify, nrog rau qhov kub thiab txias ntawm kwv yees li 80 degree ~ 130 degree. Cov resin nyob rau hauv qhov ntsuas kub no yog tag nrho ntws. Nyob rau theem tom ntej, lub siab txaus yuav tsum tau muab los pab cov resin ntws sai sai los ua kom tiav qhov khoob ntawm cov xov hlau thiab tsim kom muaj zog adhesion nrog txhua txheej ntawm tooj liab. Qhov no yog qhov teeb meem ntawm kev xaiv thiab tswj cov cua kub thiab lub sij hawm siab.

Laminar stretching yog qhov kev hloov pauv uas tshwm sim los ntawm qhov kub thiab txias ntawm cov txheej txheem ntawm cov txheej txheem hauv cov hlau. Vim yog yam xws li phaj thickness, seem tooj liab tus nqi, tooj liab thickness, qauv sib cais, PP hom thiab kom muaj nuj nqis, qhov expansion thiab contraction hloov ntawm txhua txheej ntawm core board yog inconsistent.

Thaum lub sij hawm riveting txheej txheem ntawm lub phaj khoov, vim muaj ntau yam xws li siab dhau ntawm lub ntsiab ncej ntawm lub tshuab riveting, qis qhov siab ntawm cov ntsia hlau kho, los yog muaj cov drilled thiab melted adhesive hais nyob rau hauv lub PP orifice, nyias daim hlau ( Feem ntau Tsawg dua lossis sib npaug rau 0.13mm) yog qhov ua rau muaj kev puas tsuaj thaum lub sijhawm riveting. Thaum lub sij hawm cov txheej txheem nias, cov phaj tseem ceeb puas yuav tsis raug rau lub zog tensile ruaj khov ntawm cov rivets, thiab yuav muaj kev sib txawv tseem ceeb nyob rau hauv kev cuam tshuam ntawm cov yam ntxwv xws li PP kua nplaum ntws, uas ua rau cov txheej txheem sib txawv.

Yuav kom daws tau qhov teeb meem ntawm cov txheej txheem sib txawv, cov tuam txhab tsim khoom yuav tsum ua kom pom tseeb, kev tswj xyuas, thiab kev ntsuas kho. Thaum lub sij hawm tsim khoom, kev soj ntsuam nruj nruj yuav tsum tau ua rau txhua qhov kev sib txuas, xws li cov thickness, aperture, thiab drilling zoo ntawm lub qhov hauv txheej. Nyob rau tib lub sijhawm, cov cuab yeej tswj tsis siv neeg niaj hnub no thiab cov cuab yeej kho kom zoo tuaj yeem txo lossis tshem tawm cov teeb meem sib txawv.