Thaum tsim qauv PCB cov ntaub qhwv hauv PCB pawg thawj coj tsim, nws yog qhov tsim nyog los tsim nruj raws li qhov xav tau thiab cov qauv. Vim tias PCB ncoo tsim yog qhov tseem ceeb heev hauv kev ua SMT, cov ntaub qhwv tsim yuav cuam tshuam ncaj qha rau kev sib txuas, ruaj khov thiab hloov pauv kub ntawm cov khoom, cuam tshuam nrog kev ua tau zoo ntawm SMT, yog li DESIGN tus qauv ntawm PCB ncoo yog dab tsi?

Tsim tus qauv ntawm cov duab thiab qhov loj ntawm PCB ncoo:

1. Hu PCB txheej txheem ntim tsev qiv ntawv.

2, qhov tsawg kawg nkaus ib sab ncoo tsis pub tsawg tshaj 0.25mm, qhov siab tshaj plaws ntawm tag nrho cov ncoo tsis ntau tshaj 3 zaug ntawm lub qhov taub ntawm cov khoom siv.

3. Sim ua kom ntseeg tau tias qhov kev ncua deb nruab nrab ntawm ob lub pawm no ntau dua 0.4mm.

4. Pads nrog txoj kab uas hla ntau dua 1.2mm lossis 3.0mm yuav tsum tsim los ua pob zeb diamond lossis plum

5. Nyob rau hauv cov ntaub ntawv ntawm txoj kab tuab, daim ntawv oval thiab oblong txuas tau pom zoo. Txoj kab uas hla lossis qhov dav yam tsawg kawg nkaus ntawm ib lub vaj huam sib luag yog 1.6 hli; Ob chav vaj huam sib luag tsis muaj zog kab ntawv tam sim no tsuas xav tau lub qhov taub ntxiv rau 0.5mm, cov ntaub qhwv loj loj yooj yim ua rau tsis txuas ntxiv txuas ntxiv mus.

Ob, PCB ncoo los ntawm tus qauv qhov loj:

Sab hauv ntawm lub ncoo feem ntau tsis pub tsawg tshaj 0.6mm, vim tias nws tsis yooj yim rau txheej txheem thaum lub qhov qis dua 0.6mm. Feem ntau, txoj kab uas hla ntawm tus hlau hlau ntxiv rau 0.2 hli yog siv los ua lub qhov taub sab hauv ntawm lub ncoo. Yog hais tias cov hlau hlau txoj kab uas hla ntawm qhov tsis kam yog 0.5 hli, sab hauv lub taub ntawm lub ncoo yog 0.7 hli, thiab txoj kab uas hla ntawm lub ncoo nyob ntawm lub qhov taub sab hauv.

Cov ntsiab lus tseem ceeb ntawm kev ntseeg tau tsim ntawm PCB ncoo

1. Sib npaug, txhawm rau kom ntseeg tau tias qhov sib npaug ntawm qhov sib npaug ntawm cov kua nplaum yaj, ob qho kawg ntawm lub ncoo yuav tsum yog sib npaug.

2. Ncoo ncoo, ncoo ncoo loj dhau lossis me dhau yuav ua rau vuam tsis zoo, yog li xyuas kom cov khoom sib dhos xaus lossis cov pins tau zoo sib nrug ntawm lub ncoo.

3. Qhov seem ntawm qhov ncoo. Qhov seem me me ntawm cov khoom tiv thaiv kawg lossis tus pin tom qab ncej puab nrog lub ncoo yuav tsum xyuas kom meej tias cov laug sib koom ua ke tuaj yeem tsim cov meniscus nto.

4. Qhov dav ntawm lub ncoo yuav tsum yog qhov qub ib yam li qhov dav ntawm qhov tivthaiv kawg lossis tus pin.

Kev tsim PCB ncoo kom raug, yog tias muaj qhov me me ntawm qhov khawb thaum ua haujlwm SMT, tuaj yeem kho thaum lub sij hawm rov ua haujlwm rov qab vim yog qhov nro saum npoo ntawm cov hlau yaj. Yog tias PCB daim ntawv tsim tawm tsis raug, txawm tias qhov chaw teeb tsa raug qhov tseeb, nws yog qhov yooj yim kom pom qhov sib txawv ntawm txoj haujlwm sib txawv, ncua kev txuas choj thiab lwm yam tsis xws luag tom qab rov ua vuam. Yog li ntawd, PCB tsim cov ntawv yuav tsum tau them nyiaj mloog thaum tsim PCB.