Lub ntsiab lus ntawm PCB txheej txheem? Tom ntej no, Kuv yuav piav qhia lub ntsiab lus ntawm txheej txheem PCB. Kab lus no yuav piav qhia PCB txheej txheem kev tsim khoom thiab cov tseev kom muaj rau cov tuam ntxhab. Nyob ntawm cov chaw tsim khoom tsim nyog lossis txwv, lawv tuaj yeem raug faib ua pawg raws li qeb “txheej txheem”. Cov pawg no tau txiav txim siab feem ntau los ntawm tus nqi. Cov txheej txheem qib siab dua, tus nqi ntau dua. Txheej txheem pawg pab tsim qauv tswj tus nqi los ntawm kev txwv kev tsim qauv.

Cov ntu hauv qab no piav qhia qhov sib txawv ntawm cov txheej txheem sib txawv, txhais cov kev txwv kev tsim khoom, thiab mus rau hauv kev nthuav dav txog txhua tus txheej txheem, tshwj xeeb yog cov txheej txheem ib txwm muaj thiab yuav ua li cas tus tsim qauv sau cov ntawv tsim thiab cov lus qhia rau txhua kauj ruam.

Tus tsim qauv tsim cov ntawv tuaj yeem yog cov ntawv sau ua ke sau rau hauv PCB cov ntaub ntawv cov ntaub ntawv (xws li Gerber file lossis qee cov ntaub ntawv cov ntaub ntawv), lossis lawv tuaj yeem muab los ntawm PCB daim duab nws tus kheej, uas sib tham nrog tus tsim qauv xav tau thiab cov ntsiab lus txheej txheem tsim khoom. Kev tawm tswv yim yog ib qho ntawm qhov tsis meej pem thiab tsis meej pem ntawm PCB cov txheej txheem. Ntau tus neeg tsim qauv tsis paub yuav txheeb xyuas cov lus pom no lossis yuav qhia dab tsi. Qhov no tau ua nyuaj dua los ntawm kev tsim khoom sib txawv ntawm cov peev txheej ntawm cov tuam ntxhab thiab tsis muaj cov txheej txheem cuam tshuam. Tus tsim qauv yuav tsum nug ob peb nqe lus nug thiab nkag siab cov txheej txheem tsim khoom ua ntej qhia tus tsim khoom yuav ua li cas thiaj tsim khoom.

Yog li ntawv vim li cas? Cov lus pom tau ua tsis txwv cov tuam txhab tab sis muab kev sib xws thiab qhov pib uas yog qhov tseem ceeb thaum sim kho qee qhov txiaj ntsig. Cov txiaj ntsig tau hais hauv daim ntawv no yog ua raws cov txheej txheem ib txwm muaj.

Yog li ntawv yog dab tsi? Paj ntaub yog kev paub txog kev tsim, tsim khoom, lossis ua qee lub hom phiaj lossis ua haujlwm. Hauv PCB tsim, lub sijhawm txheej txheem tsis yog hais txog cov txheej txheem cov ntaub ntawv nkaus xwb, tab sis kuj tseem muaj peev xwm ntawm cov chaw tsim khoom. Cov ntaub ntawv no yog ua raws qhov ua tau zoo ntawm cov khoom siv tsim khoom thiab txheej txheem tsim tawm tag nrho.

Peb lub ntsiab lus tswj hwm yog etCH, Laum thiab sau npe. Lwm yam khoom tseem cuam tshuam rau tag nrho cov txheej txheem, tab sis peb lub ntsiab lus no yog qhov tseem ceeb tshaj plaws.

Yav dhau los, tsis muaj txoj cai meej rau cov txheej txheem no. Vim ntshai tsav cov neeg siv khoom mus deb lossis nthuav tawm cov ntaub ntawv ntau dhau rau cov neeg sib tw, cov tuam txhab tsis txaus siab txog kev tsim cov txheej txheem zoo li no, thiab tsis muaj lub koom haum lossis pab pawg twg los sau thiab teeb tsa cov ntaub ntawv. Yog li ntawd, nrog kev txhim kho ntawm PCB kev lag luam, maj mam tsim cov txheej txheem txheej txheem tshwj xeeb, faib ua plaub pawg txheej txheem hauv qab no: ib txwm muaj, ua tau zoo tshaj plaws thiab ua tau zoo tshaj plaws. Raws li cov txheej txheem raug kho dua tshiab, cov ntaub ntawv raug hloov kho tas li, yog li cov lus qhia tshwj xeeb ntawm cov txheej txheem hloov pauv. Cov pawg txheej txheem thiab lawv cov ntsiab lus ib txwm muaj raws li hauv qab no:

Yam tsawg kawg thiab feem ntau ntawm qib ——– txheej txheem feem ntau txhais tau tias yog 0.006 in. /0.006 in. (6/6mil) yam tsawg kawg nkaus xaim/sib nrug, 0.012 in. (0.3048cm) yam tsawg kawg drilled qhov, thiab qhov siab tshaj ntawm 8- 10 txheej PCB, muab tias 0.5 ooj tooj liab tooj liab tau siv.

Cov txheej txheem qib siab ——- theem 2 ntawm tus txheej txheem, uas muaj txheej txheem txwv ntawm 5/5mil, yam tsawg kawg ntawm 0.008 in. (0.2032com) drilled qhov, thiab qhov siab tshaj ntawm 15-20 txheej PCB.

Cov txheej txheem ua thawj coj ——– yog qhov tseem ceeb tshaj plaws kev tsim khoom feem ntau siv, nrog cov txheej txheem txwv ntawm kwv yees li 2/2mil, qhov tsawg kawg ua tiav qhov loj ntawm 0.006 nyob rau hauv. (0.1524cm), thiab ntau kawg ntawm PCB txheej ntawm 25-30.

Cov txheej txheem tshaj lij tshaj plaws ——– tsis tau hais meej meej vim tias cov txheej txheem ntawm qib no tau hloov pauv tas li thiab lawv cov ntaub ntawv yuav hloov pauv lub sijhawm thiab xav tau kev hloov pauv tas li. (Nco tseg: feem ntau cov kev qhia tshwj xeeb rau cov txheej txheem hauv kev lag luam yog ua raws cov txheej txheem ib txwm siv 0.5 oz ntawm cov ntawv tooj liab thawj zaug.)