Dab tsi yog cov txheej txheem lamination ntawm PCB multilayer circuit boards?

PCB circuit boards raug faib raws li tus naj npawb ntawm cov khaubncaws sab nraud povtseg: lawv tuaj yeem muab faib ua ib sab, ob sab thiab ntau txheej boards. Cov txheej txheem ntau txheej feem ntau yog 4- txheej boards lossis 6- txheej boards, thiab cov txheej txheem ntau txheej tuaj yeem ncav cuag kaum ob txheej. Yog li, dab tsi yog txoj kev lamination ntawm PCB multilayer circuit boards?

1. Kraft daim ntawv

Thaum lub rooj tsavxwm ntau txheej yog nias (laminated), kraft ntawv feem ntau yog siv los ua cov cua kub hloov tsis tau; Nws tau muab tso rau ntawm lub phaj kub thiab lub phaj hlau ntawm lub tshuab nias kom yooj yim rau cov cua kub nkhaus ze tshaj plaws rau cov khoom siv ntau, kom ntau daim ntawv Qhov kub sib txawv ntawm txhua txheej ntawm lub substrate los yog ntau txheej board yuav tsum nias yuav tsum tau raws li. ze li sai tau, thiab qhov kev qhia tshwj xeeb yog 90 phaus txog 150 phaus.

2, hnia siab, tsis tshua muaj siab

Thaum cov txheej txheem ntau txheej raug nias ua ke, thaum cov laug cam nyob rau hauv txhua qhov qhib, lawv pib ua kom sov thiab nqa los ntawm cov txheej hauv qab uas muaj zog hydraulic sab saum toj kem rau compress cov ntaub ntawv loj hauv txhua qhov qhib rau kev sib txuas. Nyob rau lub sijhawm no, cov yeeb yaj kiab ua ke pib muag los yog maj mam ntws, yog li lub siab siv rau sab saum toj extrusion yuav tsum tsis txhob loj dhau. Txoj kev no pib siv lub siab qis (15 mus rau 50 PSI) hu ua "hnia siab". Txawm li cas los xij, thaum cov resin hauv txhua zaj duab xis yog softened thiab gelled los ntawm tshav kub thiab tab tom yuav harden, nws yuav tsum tau nce mus rau tag nrho cov siab (300-500 PSI), uas yog hu ua "tsis tshua muaj siab".

3. Copper foil nias txoj kev

Hais txog cov khoom tsim tawm ntau txheej boards. Cov txheej txheej sab nrauv yog ua los ntawm cov ntawv ci tooj liab thiab zaj duab xis ncaj qha laminated nrog cov txheej sab hauv los hloov cov txheej txheem nias ntawm ib sab nyias nyias substrates thaum ntxov.

4. Cap nias txoj kev

Nyob rau hauv cov txheej txheem lamination ntawm cov txheej txheem PCB thaum ntxov, lub sijhawm ntawd, "txheej txheej" ntawm MLB feem ntau siv nyias substrates nrog ib sab tooj liab daim tawv nqaij rau lamination thiab lamination. Nws tsis yog txog thaum kawg ntawm xyoo 1984 uas cov zis ntawm MLB tau nce ntau, thiab cov tooj liab tam sim no tau siv. Tawv-style loj los yog bulk presses.

5. Lub tshuab nqus tsev siab

Nws yog ib lub thawv ntim uas muaj qhov kub thiab txias saturated dej vapor thiab tuaj yeem siv nrog kev kub siab. Cov qauv laminated substrate tuaj yeem muab tso rau hauv nws rau lub sijhawm kom yuam cov dej vapor rau hauv lub phaj, thiab tom qab ntawd cov qauv phaj tuaj yeem raug tshem tawm thiab muab tso rau ntawm qhov kub thiab txias. Lub tin nto tau yaj thiab nws cov khoom "tiv thaiv delamination" raug ntsuas.

6. Loj platen (lamination)

Qhov no yog txoj kev tsim kho tshiab uas tso tawm cov "sib txawv PIN" hauv ntau txheej Lamination ua tus txheej txheem ntawm cov laug cam ntawm tib sab. Txoj kev tshwj xeeb yog tshem tawm cov ntawv sau npe ntawm ntau yam ntaub ntawv xoob (xws li daim ntawv txheej sab hauv, zaj duab xis, txheej txheej ib sab, thiab lwm yam); thiab hloov txheej txheej rau tooj liab ntawv, thiab pre-fab lub "lub hom phiaj" ntawm lub puab txheej phaj. Tom qab nias, lub hom phiaj yog "sweeped" tawm, thiab lub cuab tam lub qhov yog drilled los ntawm qhov chaw, uas yuav tsum tau teem rau ntawm lub drilling tshuab rau drilling.

7. Superposition

Ua ntej lamination ntawm multilayer circuit boards los yog substrates, nws yog ib qho tsim nyog yuav tsum tau ua kom cov ntaub ntawv xoob xoob xws li cov txheej sab hauv, cov yeeb yaj kiab thiab cov ntawv tooj liab nrog cov ntawv hlau, cov ntawv kraft ntawv, thiab lwm yam. Nws tuaj yeem ua tib zoo pub rau hauv cov xovxwm kub nias. Rau qhov ceev thiab zoo ntawm cov khoom loj, "automatic" stacking txoj kev yog feem ntau yuav tsum tau rau lub yim-txheej qauv; feem ntau cov chaw tsim khoom ua ke "stacking" thiab "folding" rau hauv ib qho kev ua tiav. Engineering ntawm automation yog heev complex.

Cov saum toj no yog txoj kev lamination ntawm PCB multilayer circuit board. Qhov xwm txheej tshwj xeeb yuav tsum yog raws li cov neeg siv khoom xav tau cov khoom lag luam thiab kev siv dav ntawm nws tus kheej cov peev txheej los ua cov khoom lag luam zoo.