Multilayer PCB feem ntau yog tsim los ntawm cov ntawv ci tooj liab, cov ntawv kho ib nrab, cov core board.Muaj ob hom xovxwm-haum qauv, uas yog tooj liab ntawv nyiaj thiab core board press-fit qauv thiab core board thiab core board press-fit qauv.Nyiam cov ntawv ci tooj liab thiab cov txheej txheem lamination, cov ntawv tshwj xeeb (xws li Rogess44350, thiab lwm yam) board multilayer thiab cov txheej txheem sib xyaw ua ke tuaj yeem siv cov txheej txheem lamination.Nco ntsoov tias cov txheej txheem nias (PCB Kev Tsim Kho) thiab daim duab kos ntawm cov txheej txheem txheej txheej (Stack-up-layers) yog ob lub ntsiab lus sib txawv.Tus qub yog hais txog PCB nias ua ke thaum cov txheej txheem stacked, tseem hu ua cov txheej txheem stacked, tom kawg yog hais txog PCB tsim stacking txiav txim, tseem hu ua stacking order.
1. Nias ua ke cov qauv tsim cov cai
Txhawm rau txo qhov tshwm sim ntawm PCB warpage, PCB nias ua ke cov qauv yuav tsum ua kom tau raws li qhov yuav tsum tau muaj symmetry, uas yog, lub thickness ntawm cov ntawv ci tooj liab, xov xwm txheej thiab thickness, hom duab faib (kab txheej, dav hlau txheej), nias ua ke symmetrical txheeb ze mus rau qhov chaw ntsug ntawm PCB.
2. Tus neeg xyuas pib tooj liab thickness
(1) tus neeg xyuas pib tooj liab tuab tau sau tseg rau ntawm daim duab kos rau qhov tiav tooj liab thickness, uas yog, txheej tooj liab thickness rau lub thickness ntawm hauv qab tooj liab ntawv ci ntxiv rau lub thickness ntawm lub plating txheej, lub puab tooj liab thickness rau lub thickness ntawm lub puab. hauv qab tooj liab ntawv ci.Sab nrauv tooj liab thickness ntawm daim duab kos yog "tooj liab ntawv ci thickness + plating, thiab sab hauv tooj liab thickness yog cim raws li "tooj liab ntawv ci thickness".
(2) 2OZ thiab saum toj no tuab hauv qab daim ntawv thov kev txiav txim siab.
Yuav tsum tau siv symmetrically thoob plaws hauv lub laminated qauv.
Raws li qhov ua tau kom tsis txhob muab tso rau hauv L2 thiab Ln-2 txheej, uas yog, Sab saum toj, hauv qab ntawm ob txheej txheej sab nrauv, kom tsis txhob muaj PCB nto tsis sib xws, wrinkling.
3. Nias cov qauv xav tau
Cov txheej txheem nias yog cov txheej txheem tseem ceeb ntawm PCB ntau lawm, ntau lub sij hawm lub qhov nias thiab qhov kev sib dhos disc yuav ua rau tsis zoo, qhov loj dua PCB deformation, tshwj xeeb tshaj yog thaum asymmetric nias ua ke.Lamination yuav tsum tau rau lamination, xws li tooj liab thickness thiab media thickness yuav tsum sib phim.
Lub sij hawm xa tuaj: Nov-18-2022