Daim Ntawv Thov Vijtsev Printing hauv PCB Ntau Lawm 2

- Feb 14, 2018 -

Daim Ntawv Thov Vijtsev Printing hauv PCB Ntau Lawm 2


Application of Screen Printing in PCB Production 2.jpg

1. PCB resist film printing Lub rooj tsim khoom tsim hluav taws xob tsim tawm hauv lub tsim ntawm ib cov yeeb yaj kiab, uas yog cov duab luam tawm tsam; nws yog ua los ntawm kev luam ntawv. Rau cov neeg ua haujlwm xws li circuits thiab cov pawm ntawm lub tooj liab clad laminate, ob txoj kev ua haujlwm yog nquag siv: ib qho yog qhov screen printing method thiab lwm tus yog photolithography. Lithography cov nqi yog siab, nrog rau kev nce ntawm kev tshuaj xyuas kev luam ntawv, tshuaj ntsuam kev luam ntawv yog siv ntau dua. Vijtsam luam tawm hom uas yog pre-printed ntawm CCL resist film, thiab tom qab ntawd ces tsis sib luag ntawm qhov kev tiv thaiv tsis yog etched tseg, thiab tom qab ntawd ces tshem tawm cov duab fav tawm, kom tau txais tus qauv tsim cov qauv. Hauv npo luam tawm siv tau hauv polyester lossis stainless hlau xaim, ob lub vijtsam luam tawm yog kev siab tshaj. Phaj tuaj yeem siv ncaj qha cov phom los yog phaj siab ncaj. Kev siv cov phaj ncaj nraim, lub thickness ntawm cov yeeb yaj kiab cov duab xim rau tus tswv, qhov kev luam ntawm daim npog thoob lauj kaub (25 ~ 30) μm zoo dua. Anti-corrosion inks yog feem ntau alkali-soluble inks, luam tawm ntawm CCL tom qab corrosion tsis ua hauj lwm ntawm ferric chloride thiab lwm acidic kua. Vijtsam printing scraper tau los ntawm polyurethane roj hmab, lub thickness of 8mm, cov ntug dej ntawm 70, scraper puab xaiv lub kaum sab xis, scraper thiab lub voj voog ntawm kaum (50 ~ 60) °, luam tawm yuav tsum tau tswj kom tswj tau Etching film thickness tom qab ziab . Qhov, nce kev txhim kho haujlwm. Vijtsam luam tawm tom qab so kom qhuav nrog lub ncuav ci sab hauv sab hauv 2 min, tab sis nrog kev ziab khaub ncaws, ntsuas kub (25 ~ 30) , hais txog 4 teev lossis ntev dua. Tom qab ziab ntawm lub rooj sib txig ntawm Circuit Court tuaj yeem nkag mus rau cov txheej txheem acidic, tom qab etching nrog 1% ~ 2% sodium hydroxide dilute alkali spray rau daim nyias nyias. Txij ntawm no mus lub luag hauj lwm ntawm PCB tiv thaiv yeeb yaj kiab tiav.

2. Cov nplaum luam tawm nto ntawm qhov chaw, qhov siv rau cov txheej txheem ntawm cov laug thiab qhov nruab ntawm qhov sib txuam loj, cov ntaub ntawv siv tshuaj nplaum yog feem ntau cov xim liab-Uv UV nplaum. Cov nplaum nyob rau hauv UV irradiation, sab hauv dawb radicals yuav nqus UV ua rau tag nrho cov nplaum kabmob los yog polymerization reaction. Nyob rau hauv ib lub sij hawm luv luv ntawm lub sij hawm ua tiav ib qho kev sib koom ua lag luam.

3 muab tshuaj txhuam (muab tshuaj txhuam) tso rau hauv plhaus nkawm feem ntau ua ntej tso rau hauv lub substrate ntawm ntau lub Cheebtsam, thiab tom qab ntawd ces lub lauj kaub tais diav. Lub hom phiaj ntawm cov tshuab luam yeeb yaj luam yog muab xa rau cov khoom sib txuas rau pawg thaij tawm hauv cheeb tsam. Ntau pawg, siv hom no ua kom nws txoj kev kawm zoo heev. Lub kaus mom feem ntau muaj li ntawm cov khoom siv hauv koos poom, solvents, fluxes thiab lwm yam khoom. Nws siab viscosity, loj txhuam coefficient. Feem ntau siv cov nplaum nplaum yog lub nruab nrab ntawm qhov chaw ntawm 183 . Sludge luam ntawv thiab luam yeeb luam tsis yog tib yam, luam ntawv tshwj xeeb mloog mus rau scraper ceev, nws yog ib qhov tsim nyog los qeeb thiab niaj hnub. Tib txoj kev los xyuas kom meej ntawm qhov zoo ntawm lub lauj kaub tais diav. Ntxiv rau kev them nyiaj tshwj xeeb kom tsis txhob muaj oxidation ntawm lub voj voos kab laug sab, lub voj voog kab laug sab yog oxidized, uas pom tias qhov vuam zoo. Muaj qee zaum, siv lub cav tau zoo, tab sis cov khoom tsis zoo, qhov hluav taws xob yuav tsum oxidized, thiab cov vuam yuav pluag. Yog li ntawd, nws yog ib qhov tsim nyog los tiv thaiv qhov tshuaj tiv thaiv oxidation vim dej noo thiab lwm yam.

4. Kos tus cim rau number case printing Daim duab 28 txheej PCB lub rooj sib tw duab cim kab hauv lub rooj tsav xwm tom qab tiav ntawm lub cim tiav. Npaum zuaj cim nta spectrophotometry muaj thiab thermoset ob pawg, thiab txhua tus muab faib ua ib feem thiab ob qho ob qho. Cov ntawv cog lus yuav tsum tau muaj nyob hauv ob sab (qhov ntawd yog, qhov fais fab hauv plooj thiab qhov vuam qhov vuam) yuav tsum yog npo luam tawm cim cim. Ntau hom cwj mem kob zaj duab xis thickness yuav sib txawv, lub thickness film ntawm qhov zoo ntawm cov ntawv cog lus Circuit Board tau muaj kev cuam tshuam ntau. Caw zaj duab xis tuab thiab ntau txoj kev ua ke, yog li ua kom nkag tau ntau hom kev ua teb, raws li qhov kev lag luam los tswj cov thickness ntawm zaj duab xis. Vijtsam luam tawm ntxiv nrog rau cov chaw sau saum toj no, tabsis tseem nyob rau hauv lub tshuab npog zaj duab xis, cov ntawv luam tawm thiab lwm thaj chaw ntawm kev siv ntau. Txawm hais tias screen luam tau ua ib qho chaw irreplaceable nyob rau hauv PCB manufacturing kev lag luam hnub no, nws muaj peev xwm kov tau txawm tshaj plaws tshaj plaws thiab sophisticated Circuit Court board ntau lawm. Txawm li cas los xij, qhov kev lag luam ntawm lub rooj tsav xwm hauv tsev tsim khoom kuj nce ntxiv, yog li no cov tshuab luam ntawv tshuab luam tawm ua ntej yuav tsum muaj kev tshaj lij.


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