Printed Circuit Boards (PCBs)yog cov qauv siv los txuas thiab txhawb cov khoom siv hluav taws xob. PCB muaj txoj hauv kev los ntawm cov khoom sib txawv tuaj yeem txuas rau tag nrho lub rooj tsavxwm. Cov kab no yog etched los ntawm cov ntawv tooj liab. Txhawm rau kom ntseeg tau tias cov txheej tooj liab tsis ua cov cim lossis cov khoom siv tam sim no, thov laminate rau hauv substrate.
Hom PCB lamination cov kev pab cuam
Cov nram qab no feem ntau siv cov txheej txheem PCB lamination, nyob ntawm seb hom PCB siv:
Multilayer PCB: Lub rooj tsav xwm Circuit Court uas muaj ntau txheej txheej yog hu ua multi-layer PCB. Cov khaubncaws sab nraud povtseg tuaj yeem yog daim hlau nyias nyias lossis cov hlua txuas. Hauv ob qho tib si, lawv tau sib koom ua ke los ntawm lamination. Txhawm rau ua cov lamination, txheej txheej sab hauv ntawm PCB yuav tsum tiv taus qhov kub thiab txias (375o F) thiab siab (275 txog 400 psi). Ua cov kauj ruam no thaum laminating nrog photosensitive qhuav tiv taus. Tom qab ntawd, tso cai rau PCB kom khov ntawm qhov kub thiab txias. Thaum kawg, maj mam tso lub siab thiab maj mam txias cov khoom laminated.
Ob chav sided PCB: Txawm hais tias kev tsim khoom ntawm ob tog PCB txawv ntawm lwm hom PCB, txheej txheem lamination zoo sib xws. Lub photosensitive qhuav tiv thaiv txheej yog siv rau laminating PCB boards. Raws li tau piav qhia hauv ntau txheej PCBs, cov txheej txheem no tau ua tiav ntawm qhov kub thiab txias.
Sequential lamination: Yog tias PCB muaj ob lossis ntau qhov subsets, siv tshuab lamination ua ntu zus. Subsets ntawm ntau txheej PCBs yog tsim nyob rau hauv ib qho kev sib cais. Tom qab ntawd, cov tshuaj dielectric yog muab tso rau ntawm txhua khub ntawm subsets. Ua cov txheej txheem tsim khoom tom qab cov txheej txheem no.
PTFE microwave laminate: PTFE microwave laminate yog ib qho ntawm feem ntau siv laminates rau PCB lamination. Yog vim li cas yog hais tias nws muaj ib tug tsis tu ncua dielectric tsis tu ncua, tsis tshua muaj hluav taws xob poob, thiab nruj thickness kam rau ua. Cov haujlwm no yog cov ntawv luam tawm zoo tshaj plaws uas tuaj yeem siv rau hauv cov ntawv thov uas suav nrog RF. CTFE (trifluoroethylene) thermoplastic zaj duab xis yog cov khoom siv feem ntau siv rau PTFE lamination.