Yooj yim muab, PCB liab qab yog hais txog lub rooj tsav xwm luam tawm uas tsis muaj qhov los ntawm qhov lossis cov khoom siv hluav taws xob. Lawv feem ntau hu ua PCBs liab qab thiab qee zaum kuj hu ua PCBs. Lub rooj tsavxwm PCB dawb paug tsuas muaj cov qauv yooj yim, cov qauv, txheej hlau thiab PCB substrate.

Dab tsi yog kev siv lub rooj tsavxwm PCB?
PCB liab qab yog lub cev pob txha ntawm lub rooj tsav xwm ib txwm muaj. Nws taw qhia tam sim no thiab tam sim no los ntawm txoj hauv kev uas tsim nyog thiab siv rau hauv cov khoom siv hluav taws xob feem ntau.

Qhov yooj yim ntawm PCB dawb paug muab cov engineers thiab cov tsim qauv muaj kev ywj pheej txaus los ntxiv cov khoom raws li xav tau. Lub rooj tsavxwm dawb no muab kev yoog raws thiab ua kom muaj ntau lawm.

Lub rooj tsavxwm PCB no xav tau kev tsim qauv ntau dua li lwm txoj hauv kev xaim, tab sis feem ntau nws tuaj yeem siv tau tom qab sib dhos thiab tsim khoom. Qhov no ua rau PCB boards qhov kev xaiv pheej yig tshaj plaws thiab zoo tshaj plaws.

Lub rooj tsavxwm liab qab tsuas yog siv tau tom qab ntxiv cov khoom. Lub hom phiaj kawg ntawm lub PCB liab qab yog los ua ib lub rooj tsav xwm ua tiav. Yog tias sib phim nrog cov khoom tsim nyog, nws yuav muaj ntau yam siv.

Txawm li cas los xij, qhov no tsis yog siv cov PCB liab qab xwb. Blank PCB yog lub sijhawm zoo tshaj plaws los ua cov kev kuaj liab qab hauv cov txheej txheem kev tsim khoom hauv Circuit Court. Nws yog ib qho tseem ceeb los tiv thaiv ntau yam teeb meem uas yuav tshwm sim yav tom ntej.
Vim li cas ho tsis kuaj lub rooj tsavxwm?
Muaj ntau qhov laj thawj rau kev sim cov laug cam. Raws li lub rooj tsav xwm hauv Circuit Court, PCB board tsis ua haujlwm tom qab kev teeb tsa yuav ua rau muaj ntau yam teeb meem.

Txawm hais tias tsis muaj ntau, PCB liab qab yuav muaj qhov tsis xws luag ua ntej ntxiv cov khoom. Cov teeb meem ntau tshaj yog over-etching, under-etching thiab qhov. Txawm tias me me tsis xws luag tuaj yeem ua rau kev tsim khoom tsis ua haujlwm.

Vim tias qhov nce ntawm kev sib xyaw ua ke, qhov kev thov rau multiilayer pcb cov laug cam tseem nce, ua rau pawg thawj coj ua liab qab ntau dua. Tom qab sib sau ua ke ntau txheej PCB, ib zaug ua tsis tiav, nws yuav luag tsis tuaj yeem kho nws.

Yog hais tias lub PCB liab qab yog lub cev pob txha ntawm lub rooj tsav xwm Circuit Court, cov khoom yog cov kabmob thiab cov leeg. Cheebtsam yuav kim heev thiab feem ntau tseem ceeb, yog li nyob rau hauv lub sij hawm ntev, muaj ib tug muaj zog thav duab yuav tiv thaiv high-end Cheebtsam los ntawm nkim.

Hom kev kuaj liab qab
Yuav ua li cas paub yog tias PCB puas lawm?
Qhov no yuav tsum tau sim nyob rau hauv ob txoj kev sib txawv: hluav taws xob thiab tsis kam.
Lub rooj tsavxwm liab qab kuj tseem txiav txim siab qhov kev sib cais thiab txuas ntxiv ntawm kev sib txuas hluav taws xob. Kev ntsuas kev sib cais ntsuas qhov kev sib txuas ntawm ob qhov kev sib txuas sib cais, thaum qhov kev kuaj xyuas txuas ntxiv kom ntseeg tau tias tsis muaj cov ntsiab lus qhib uas yuav cuam tshuam rau qhov tam sim no.
Txawm hais tias kev ntsuas hluav taws xob muaj ntau, kev ntsuas kev tiv thaiv tsis yog qhov tsis tshua muaj. Qee lub tuam txhab yuav siv qhov sib xyaw ua ke ntawm ob, tsis yog qhov muag tsis pom kev siv ib qho kev sim.
Kev ntsuam xyuas tsis kam xa tam sim no los ntawm tus neeg xyuas pib los ntsuas qhov kev tawm tsam. Kev sib txuas ntev dua los yog nyias yuav ua rau muaj kev tiv thaiv ntau dua li kev sib txuas luv luv los yog tuab dua.
Batch xeem
Rau cov khoom lag luam nrog qee qhov kev ntsuas, cov tuam txhab luam tawm Circuit Board feem ntau yuav siv cov khoom siv ruaj khov rau kev sim, hu ua "test racks." Qhov kev sim no siv lub caij nplooj ntoos hlav-loaded pins los ntsuas txhua qhov sib txuas ntawm PCB.
Qhov kev ntsuam xyuas ruaj khov yog qhov ua tau zoo heev thiab tuaj yeem ua tiav hauv ob peb feeb xwb. Lub ntsiab tsis zoo yog tus nqi siab thiab tsis muaj kev hloov pauv. Txawv PCB tsim yuav tsum tau sib txawv fixtures thiab pins (tsim rau loj ntau lawm).
Prototype xeem
Kev sojntsuam ya ya feem ntau yog siv. Ob tug neeg hlau caj npab nrog rods siv ib tug software kev pab cuam los ntsuam xyuas lub board kev twb kev txuas.
Piv nrog rau kev ntsuas qhov ruaj khov, nws siv sijhawm ntev dua, tab sis nws pheej yig thiab hloov tau. Kev sim cov qauv sib txawv yog yooj yim li uploading ib cov ntaub ntawv tshiab.

Cov txiaj ntsig ntawm kev kuaj liab qab
Bare board kuaj muaj ntau qhov zoo, tsis muaj qhov tsis zoo. Cov kauj ruam no hauv kev tsim khoom tuaj yeem zam tau ntau yam teeb meem. Ib qho me me ntawm kev nqis peev thaum ntxov tuaj yeem txuag tau ntau yam kev saib xyuas thiab hloov cov nqi.

Bare board kuaj pab nrhiav teeb meem thaum ntxov hauv kev tsim khoom. Nrhiav qhov teeb meem thaum ntxov txhais tau tias nrhiav lub hauv paus ntawm qhov teeb meem thiab muaj peev xwm daws tau qhov teeb meem ntawm nws lub hauv paus.

Yog tias qhov teeb meem raug pom nyob rau hauv cov txheej txheem tom ntej, nws yuav nyuaj rau nrhiav qhov teeb meem hauv paus. Thaum lub rooj tsavxwm PCB raug them los ntawm cov khoom, nws tsis tuaj yeem txiav txim siab seb qhov teeb meem tshwm sim li cas. Kev sim thaum ntxov pab daws qhov teeb meem hauv paus.

Kev sim kuj ua kom yooj yim rau tag nrho cov txheej txheem. Yog tias muaj teeb meem nrhiav pom thiab daws tau thaum lub sij hawm tsim qauv qauv, cov txheej txheem tsim khoom tom ntej tuaj yeem ua mus yam tsis muaj kev cuam tshuam.

Txuag lub sijhawm ua haujlwm los ntawm kev kuaj lub rooj tsavxwm

Tom qab paub tias lub rooj tsavxwm liab qab yog dab tsi, thiab nkag siab txog qhov tseem ceeb ntawm kev kuaj lub rooj tsavxwm. Koj yuav pom tias txawm tias qhov txheej txheem pib ntawm qhov project yuav qeeb heev vim kev sim, lub sijhawm txuag los ntawm kev kuaj xyuas lub rooj tsavxwm rau qhov project yog ntau dua li lub sijhawm nws siv. Paub seb puas muaj qhov yuam kev hauv PCB tuaj yeem ua rau kev daws teeb meem yooj yim dua.

Lub sij hawm thaum ntxov yog lub sij hawm zoo tshaj plaws rau kev ntsuam xyuas lub rooj tsavxwm. Yog tias lub rooj sib tham sib dhos ua tsis tiav thiab koj xav kho nws ntawm qhov chaw, tus nqi poob yuav ntau pua zaus ntau dua.

Thaum lub substrate muaj teeb meem, muaj peev xwm ntawm nws cov cracking yuav nce sharply. Yog hais tias cov khoom kim heev tau raug soldered rau PCB, qhov poob yuav raug nce ntxiv. Yog li ntawd, nws yog qhov phem tshaj los nrhiav qhov txhaum tom qab lub rooj sib tham hauv Circuit Court tau sib sau ua ke. Cov teeb meem pom nyob rau lub sijhawm no feem ntau ua rau cov khoom siv tag nrho.

Nrog rau kev txhim kho kev ua tau zoo thiab qhov raug muab los ntawm qhov kev sim, nws tsim nyog los ua qhov kev ntsuam xyuas liab qab hauv cov theem pib ntawm kev tsim khoom. Tom qab tag nrho, yog tias lub rooj tsav xwm zaum kawg tsis ua tiav, ntau txhiab yam khoom yuav raug pov tseg.