Hauv cov txheej txheem tsim khoom ntawm pcb, tsim cov ntaub ntawv yog tus choj ntawm cov tswv yim tsim thiab kev tsim khoom tiag tiag, thiab lawv qhov ua tiav thiab qhov tseeb ncaj qha txiav txim siab qhov kev ua haujlwm, kev ua haujlwm ntau lawm, thiab cov nqi tsim khoom ntawm cov khoom. Cov ntaub ntawv tsim qauv tsim qauv tsis yog tsuas yog ua kom ntseeg tau tias kev ua haujlwm hluav taws xob ntawm lub rooj tsav xwm hluav taws xob ua tau raws li cov qauv, tab sis kuj tseem pab cov tuam txhab ua kom tiav tag nrho cov saw hlau ntawm kev ua haujlwm los ntawm cov khoom siv raw mus rau kev ua tiav. Hauv qab no, peb yuav npaj cov qauv tsim cov ntaub ntawv xav tau rau kev tsim khoom pcb, tshuaj xyuas qhov chaw ua haujlwm, cov ntsiab lus kev ua haujlwm, thiab kev sib koom ua ke ntawm txhua cov ntaub ntawv, thiab muab cov kev taw qhia meej rau cov engineers thiab cov neeg ua haujlwm tsim khoom.
pcb schematic daim duab
Lub pcb schematic tuaj yeem suav tau tias yog lub hauv paus ntawm pcb tsim, uas qhia meej txog kev sib txuas ntawm hluav taws xob sib txuas ntawm lub voj voog nyob rau hauv daim ntawv ntawm cov cim thiab kab. Daim duab schematic qhia cov npe ntawm tag nrho cov khoom nyob rau hauv kom meej, xws li resistors pib nrog "R" thiab capacitors pib nrog "C", qhia meej cov naj npawb ntawm pins thiab lub ntsiab lus ntawm txhua tus pin. Nws kuj tseem qhia txog cov hluav taws xob tseem ceeb xws li tam sim no thiab qhov hluav taws xob, nrog rau cov khoom siv hluav taws xob ntawm txhua qhov khoom. Cov ntaub ntawv no yog lub hauv paus tseem ceeb rau cov engineers kom nkag siab txog kev ua haujlwm hauv Circuit Court, daws teeb meem thiab txhim kho cov qauv tsim, thiab tseem yog qhov tseem ceeb lav rau kev ua kom muaj qhov tseeb ntawm cov txheej txheem pcb.
Gerber cov ntaub ntawv
Gerber cov ntaub ntawv yog cov ntaub ntawv tseem ceeb tsim los ntawm pcb tsim software rau kev tsim khoom tiag tiag. Nws muaj cov ntaub ntawv nplua nuj thiab tseem ceeb xws li kev faib tawm ntawm cov ntawv ci tooj liab nyob rau sab nraud, qhov teeb tsa ntawm cov ntawv ci tooj liab nyob rau hauv lub voj voog sab hauv, qhov chaw tin txau, thiab kev sib txuas ntawm cov qhov. Gerber cov ntaub ntawv zoo li cov duab kos duab meej, coj txhua kauj ruam ntawm cov txheej txheem pcb. Cov qauv Gerber cov ntaub ntawv feem ntau muab faib ua RS-274, RS-274X, thiab GerberX2. Nyob rau hauv RS-274 hom ntawv, Gerber cov ntaub ntawv thiab cov ntaub ntawv aperture yog ywj siab ntawm ib leeg, thaum lub RS-274X hom integrates aperture cov ntaub ntawv nyob rau hauv cov ntaub ntawv Gerber yam tsis tas yuav tsum tau rau ib tug cais aperture ntaub ntawv. Raws li cov qauv tshiab, GerberX2 tuaj yeem tsis tsuas yog embed cov ntaub ntawv stacking ntawm cov laug cam, tab sis kuj ntxig CAD cov yam ntxwv, txhim kho tag nrho cov txiaj ntsig ntawm kev tsim, engineering, thiab ntau lawm. Hauv kev tsim khoom tiag tiag, los ntawm kev xa cov ntaub ntawv Gerber rau hauv CAM software, cov ntaub ntawv meej txhawb nqa tuaj yeem muab rau txhua tus txheej txheem pcb, xws li etching, drilling, solder mask, thiab lwm yam.
Drilling ntaub ntawv
Drilling cov ntaub ntawv feem ntau yog siv los piav txog txoj haujlwm, qhov loj me, thiab lwm yam ntaub ntawv ntawm ntau qhov ntawm pcbs. Hauv kev tsim cov txheej txheem pcb, qhov drilling yog ib qho tseem ceeb rau kev txhim kho cov ntsaws - nyob rau hauv cov khoom siv pins, ua tiav kev sib txuas hluav taws xob sib txuas, thiab lwm yam. Cov ntaub ntawv drilling feem ntau yog Excellon hom, uas yog sau kom raug txoj hauj lwm sib koom ua ke, aperture loj, thiab lwm yam ntawm txhua lub qhov. pcb cov chaw tsim khoom siv CNC drilling tshuab rau tho qhov uas ua tau raws li qhov yuav tsum tau muaj ntawm cov chaw tsim khoom raws li cov ntaub ntawv drilling, kom ntseeg tau qhov tseeb ntawm cov khoom siv txuas ntxiv thiab kev sib txuas hluav taws xob. Piv txwv li, rau ib tug pcb uas yuav tsum tau rau lub installation ntawm ib tug loj tus naj npawb ntawm plug - nyob rau hauv resistors thiab capacitors, cov ntaub ntawv drilling yuav raug coj lub tshuab drilling kom laum lub installation qhov nrog cov diameters tsim nyog ntawm cov haujlwm sib xws.
Daim ntawv qhia txog txheej txheem
Cov txheej txheem tshwj xeeb cov ntaub ntawv yog cov lus piav qhia ntxaws txog cov txheej txheem tshwj xeeb uas yuav tsum tau ua hauv cov txheej txheem tsim khoom pcb. Piv txwv li, rau pcbs nrog impedance tswj qhov yuav tsum tau, nws yog ib qhov tsim nyog los qhia cov yam ntxwv impedance qhov tseem ceeb ntawm txhua lub teeb liab txheej, tso cai impedance sib txawv ntau yam, thiab cov kev ntsuas coj mus cuag impedance tswj, xws li tej kab dav, kab nrug, dielectric txheej thickness, thiab lwm yam., nyob rau hauv cov txheej txheem piav qhia. Yog tias siv cov txheej txheem tshwj xeeb saum npoo av, xws li electroless nickel plating thiab immersion hauv kub, organic solder mask, thiab lwm yam, cov txheej txheem tsis thiab cov qauv zoo yuav tsum tau piav qhia hauv daim ntawv. Tsis tas li ntawd, cov ntsiab lus tshwj xeeb xws li cov txheej txheem lamination yuav tsum tau ua thiab cov txheej txheem tsim hluav taws xob sab hauv hauv ntau- txheej txheej pawg thawj coj yuav tsum raug xa mus rau cov chaw tsim khoom hauv cov txheej txheem cov ntaub ntawv tshwj xeeb kom ntseeg tau tias cov txheej txheem ntau lawm ua tau raws li kev xav tau tsim.