Raws li cov txheej txheem, pcb stencil tuaj yeem muab faib ua pawg hauv qab no:

1. Solder paste stencil: Raws li lub npe qhia, nws yog siv los txhuam cov tshuaj txhuam hniav. Carve qhov nyob rau hauv ib daim hlau uas sib haum rau cov ntaub qhwv ntawm pcb board. Tom qab ntawd siv cov nplaum nplaum rau cov ntaub qhwv rau PCB board los ntawm stencil. Thaum luam ntawv solder paste, siv cov tshuaj pleev xim rau saum lub stencil, thaum lub rooj tsav xwm hauv Circuit Court muab tso rau hauv lub stencil, thiab tom qab ntawd siv lub scraper los txhuam cov nplaum nplaum sib npaug ntawm lub qhov stencil (lub solder paste yuav tsum tau nyem los ntawm lub tshuab luam ntawv. steel mesh ntws mus rau hauv mesh thiab npog lub rooj tsav xwm Circuit Court). Muab tshuaj txhuam rau SMD cov khoom, thiab reflow soldering tuaj yeem ua tau zoo ib yam, thiab cov khoom siv plug-in yog manually soldered.

2. Liab yas stencil: Qhov qhib yog qhib nruab nrab ntawm ob lub ncoo ntawm cov khoom raws li qhov loj thiab hom ntawm qhov. Siv dispensing (dispensing yog siv compressed cua los taw tes cov kua nplaum liab rau lub substrate los ntawm ib tug tshwj xeeb dispensing taub hau) taw tes cov kua nplaum liab rau lub PCB board los ntawm cov hlau mesh. Tom qab ntawd kos cov khoom, thiab tom qab cov khoom txuas txuas nrog PCB, ntsaws rau hauv cov khoom siv ntsaws thiab hla cov nthwv dej ua ke.

3. Dual-process stencil: Thaum PCB yuav tsum tau txhuam nrog solder paste thiab kua nplaum liab, ces yuav tsum tau siv dual-process stencil. Cov txheej txheem dual-txheej txheem stencil yog tsim los ntawm ob lub stencils, ib qho zoo tib yam laser stencil thiab ib kauj ruam stencil. Yuav ua li cas txiav txim siab seb puas yuav siv cov stencil los yog cov kua nplaum liab rau cov muab tshuaj txhuam? Ua ntej nkag siab seb puas yuav txhuam cov tshuaj txhuam los yog kua nplaum liab ua ntej. Yog tias siv cov tshuaj txhuam hniav ua ntej, ces cov stencil muab tshuaj txhuam yog ua rau hauv ib qho zoo tib yam laser stencil, thiab cov kua nplaum liab stencil yog ua rau hauv cov kauj ruam stencil. Yog hais tias cov kua nplaum liab yog siv ua ntej, ces cov kua nplaum liab stencil yog ua rau hauv ib lub laser stencil zoo tib yam, thiab cov stencil muab tshuaj txhuam yog ua rau hauv cov stencil.