Yuav ua li cas xaiv cov khoom siv PCB thiab cov khoom siv hluav taws xob zoo

Kev xaiv ntawm PCB cov ntaub ntawv thiab cov khoom siv hluav taws xob tau kawm heev, vim tias cov neeg siv khoom yuav tsum xav txog ntau yam, xws li cov ntsuas kev ua tau zoo ntawm cov khoom, kev ua haujlwm, thiab cov khoom zoo thiab qib ntawm cov khoom.

Niaj hnub no, peb yuav qhia txog yuav ua li cas xaiv PCB cov ntaub ntawv thiab cov khoom siv hluav taws xob kom raug.

Kev xaiv cov khoom siv PCB

FR4 epoxy fiberglass so yog siv rau cov khoom siv hluav taws xob, polyimide fiberglass wipes yog siv rau qhov kub thiab txias los yog hloov tau yooj yim Circuit Court boards, thiab polytetrafluoroethylene fiberglass so yog xav tau rau high-frequency circuits. Rau cov khoom siv hluav taws xob uas muaj cov cua kub dissipation siab, cov hlau substrates yuav tsum tau siv.

Yam tseem ceeb uas yuav tsum tau xav txog thaum xaiv cov khoom siv PCB:

(1) Lub substrate nrog lub iav hloov pauv kub siab (Tg) yuav tsum raug xaiv kom tsim nyog, thiab Tg yuav tsum siab dua qhov kub ntawm qhov kev ua haujlwm ntawm lub voj voog.

(2) Tsawg coefficient ntawm thermal expansion (CTE) yuav tsum tau. Vim qhov tsis sib xws ntawm thermal expansion coefficient ntawm X, Y thiab thickness, nws yooj yim ua rau PCB deformation, thiab nws yuav ua rau metallization qhov tawg thiab puas cov khoom nyob rau hauv loj heev.

(3) Kev kub siab ua haujlwm yuav tsum tau ua. Feem ntau, PCB yuav tsum muaj qhov kub tsis kam ntawm 250 ℃ / 50S.

(4) Zoo flatness yuav tsum tau. PCB warpage yuav tsum tau rau SMT yog <0.0075mm/mm.

(5) Nyob rau hauv cov nqe lus ntawm kev ua tau zoo ntawm hluav taws xob, high zaus circuits yuav tsum tau xaiv cov ntaub ntawv nrog siab dielectric tas li thiab tsawg dielectric poob. Rwb thaiv tsev tsis kam, voltage zog, arc tsis kam ua kom tau raws li qhov yuav tsum tau ua ntawm cov khoom.

Kev xaiv cov khoom siv hluav taws xob

Ntxiv rau qhov ua tau raws li qhov yuav tsum tau ua ntawm hluav taws xob kev ua tau zoo, kev xaiv ntawm cov khoom yuav tsum ua kom tau raws li qhov yuav tsum tau ua ntawm kev sib dhos ntawm cov khoom siv. Tab sis kuj raws li cov kab ntau lawm cov khoom siv thiab cov txheej txheem cov khoom siv los xaiv cov khoom ntim cov khoom, cov khoom loj, cov khoom ntim khoom.

Piv txwv li, thaum lub rooj sib txoos loj yuav tsum xaiv cov khoom me me me: yog tias lub tshuab mounting tsis muaj qhov dav-loj braid feeder, SMD ntaus ntawv ntawm braid ntim tsis tuaj yeem xaiv;