Ntawv luam tawm hauv Circuit Court board (PCB) tuaj yeem muab faib ua PCB nruj thiab hloov pauv tau yooj yim, yav dhau los tuaj yeem faib ua peb hom: PCB ib leeg, ob tog PCB thiab ntau txheej PCB. According to the quality grade, PCB can be divided into three quality grades: 1, 2 and 3, of which 3 is the highest requirement. Kev sib txawv hauv qib PCB zoo ua rau nyuaj thiab sib txawv hauv kev sim thiab tshuaj xyuas txoj hauv kev.

Txog rau hnub no, txhav ob tog thiab ntau txheej PCBS tau ua haujlwm ntau yam hauv cov khoom siv hluav taws xob, nrog rau PCBS hloov pauv qee zaum siv qee qhov. Yog li no, daim ntawv no yuav tsom mus rau kev tshuaj xyuas zoo ntawm txhav ob tog thiab ntau txheej PCB. Tom qab kev tsim PCB, kev tshuaj xyuas yuav tsum tau ua los txiav txim siab seb qhov ua tau zoo raws li qhov xav tau tsim. It can be said that quality inspection is an important guarantee to ensure the quality of products and the smooth implementation of subsequent procedures.

Soj ntsuam cov qauv

Cov txheej txheem tshuaj xyuas PCB feem ntau suav nrog cov hauv qab no:

A. Cov qauv teev tseg los ntawm txhua lub tebchaws;

B. Cov qauv tub rog rau txhua lub tebchaws;

C. Cov qauv kev lag luam, xws li SJ/T10309;

D. PCB cov lus qhia tshuaj xyuas los ntawm cov khoom siv;

E. Cov txheej txheem xav tau cim ntawm PCB tsim teeb duab.

Rau PCBS uas tau txheeb xyuas tias yog ib qho tseem ceeb rau cov cuab yeej siv, cov yam ntxwv tseem ceeb no thiab cov ntsuas yuav tsum tau tshuaj xyuas ntawm lub taub hau mus rau ntiv taw ntxiv rau kev tshuaj xyuas tas li.

Cov khoom tshuaj xyuas

Txawm hais tias hom PCB zoo li cas, lawv yuav tsum dhau los ntawm cov txheej txheem tshuaj xyuas zoo thiab cov haujlwm. According to the inspection method, the quality inspection items usually include appearance inspection, general electrical performance inspection, general technical performance inspection and metal coating inspection.

• Kev tshuaj xyuas qhov tsos

Kev tshuaj xyuas qhov muag yog qhov yooj yim nrog kev pab ntawm tus kav, vernier caliper, lossis iav tsom iav. Cov khoom txheeb xyuas muaj xws li:

A. Thickness, nto roughness thiab warpage ntawm lub phaj.

B. Kev pom thiab qhov sib dhos qhov ntev, tshwj xeeb tshaj yog qhov sib dhos qhov ntev sib xws nrog cov txuas hluav taws xob thiab cov lus qhia.

C. Kev ntseeg siab thiab meej meej ntawm tus qauv coj ua, thiab seb puas muaj cov choj luv luv, qhib cov kab hluav taws xob, qhov tawg lossis qhov khoob.

D. Kev ua kom zoo, seb puas muaj qhov, khawb lossis pinholes ntawm cov xov hlau lossis cov ntaub qhwv.

E. Qhov chaw ntawm qhov ncoo thiab lwm qhov. Txheeb xyuas seb qhov dhau los ploj lossis ploj mus tsis raug, seb txoj kab uas hla ntawm lub qhov ua tau raws li qhov yuav tsum tau tsim thiab seb puas muaj cov nodules thiab qhov khoob.

F. Zoo thiab ruaj khov ntawm txheej txheej, ntxhib, ci thiab tsis pom qhov tsis xws luag.

G. Txheej zoo. Electroplating flux yog ib yam, ruaj, txoj hauj lwm yog lawm, flux yog ib yam, nws cov xim yog nyob rau hauv kab nrog cov kev xav tau.

H. Cov yam ntxwv zoo, xws li seb lawv puas ruaj khov, meej thiab huv si, tsis muaj khawb, xuas nrig lossis tawg.

• Kev tshuaj xyuas cov khoom siv hluav taws xob tas li

Muaj ob hom kev xeem nyob rau hauv hom kev txheeb xyuas no:

A. Kev sib tw ua haujlwm tau zoo. During this test, a multimeter is usually used to check the connectivity of the conductive pattern, with emphasis on the metallized perforations of double-sided PCBS and the connectivity of multi-layer PCBS. Txog qhov kev sim no, PCB chaw tsim khoom yuav muab kev tshuaj xyuas tas li ntawm txhua qhov PCB ua ntej ua ntej nws tawm ntawm lub tsev rau khoom kom ntseeg tau tias nws cov haujlwm yooj yim tau ua tiav.

B. Rwb thaiv tsev ntsuas kev ntsuas. Qhov kev ntsuas no yog tsim los tshuaj xyuas qhov rwb thaiv tsev tiv thaiv ntawm tib lub dav hlau lossis ntawm cov dav hlau sib txawv kom ntseeg tau tias kev ua haujlwm rwb thaiv tsev ntawm PCB.

• Kev tshuaj xyuas dav dav

Kev tshuaj xyuas dav dav suav nrog kev ua kom zoo thiab txheej tshuaj nplaum. Rau yav dhau los, txheeb xyuas qhov ntub dej ntawm cov laug rau tus qauv coj ua. Txog qhov kawg, kev tshuaj xyuas tuaj yeem ua tiav los ntawm cov lus qhia muaj txiaj ntsig uas tau ua thawj glued rau plating nto los tshuaj xyuas thiab tuaj yeem tshem tawm sai sai tom qab nias. Tom ntej no, lub dav hlau plating yuav tsum tau soj ntsuam kom ntseeg tau tias muaj tev tshwm sim. Ib qho ntxiv, qee qhov kev tshuaj xyuas tuaj yeem raug xaiv raws li qhov xwm txheej tiag tiag, xws li lub zog poob ntawm cov ntawv tooj liab thiab cov hlau los ntawm lub zog tensile.

• Hlau los ntawm kev tshuaj xyuas

Qhov zoo ntawm cov hlau los ntawm qhov yog qhov tseem ceeb heev rau PCB ob tog thiab ntau txheej PCB. Ntau qhov ua tsis tiav ntawm cov khoom siv hluav taws xob thiab txawm tias tag nrho cov cuab yeej siv yog vim qhov zoo ntawm cov qhov hlau. Yog li, nws yog qhov tsim nyog yuav tsum tau them nyiaj ntau dua rau kev tshuaj xyuas ntawm cov hlau los ntawm qhov. A. Lub dav hlau hlau ntawm qhov hla ntawm phab ntsa yuav tsum ua kom tiav, du thiab tsis muaj kab noj hniav lossis cov pob me me los ntawm kev tshuaj xyuas cov hlau uas npog cov hauv qab no.

B. Cov khoom siv hluav taws xob yuav tsum tau tshuaj xyuas raws li qhov luv thiab qhib hluav taws xob ntawm lub ncoo thiab cov hlau los ntawm cov txheej txheej, thiab kev tiv thaiv nruab nrab ntawm lub qhov thiab cov hlau lead.

C. Tom qab kuaj ib puag ncig, qhov hloov pauv ntawm qhov dhau los ntawm qhov yuav tsum tsis pub dhau 5% txog 10%.

D. Lub zog muaj zog hais txog kev sib zog ua kom muaj zog ntawm lub qhov hlau thiab lub ncoo.

E. Kev ntsuas tshuaj ntsuam hlau txheeb xyuas txheej zoo, txheej tuab thiab tsis sib xws, thiab lub zog ua kom sib zog ntawm txheej thiab tooj liab ntawv ci.

Hlau los ntawm kev tshuaj xyuas feem ntau yog ua ke ntawm kev tshuaj xyuas qhov muag thiab kev tshuaj xyuas tshuab. Kev tshuaj xyuas qhov muag cuam tshuam nrog nthuav tawm PCB kom pom kev thiab pom yog qhov ua tau zoo, du los ntawm qhov-phab ntsa qhia txog lub teeb sib npaug. Txawm li cas los xij, phab ntsa uas muaj cov nodules lossis voids yuav tsis ci heev. Rau ntim ntau lawm, yuav tsum siv cov cuab yeej tshuaj xyuas kab (piv txwv li, lub tshuab ntsuas rab ya).

Vim yog cov txheej txheem nyuaj ntawm ntau txheej PCBS, nws nyuaj rau nrhiav qhov ua txhaum sai sai thaum muaj teeb meem pom nyob rau lub sijhawm tom ntej chav teeb tsa kev sib dhos ua ke. Vim li ntawd, kev tshuaj xyuas ntawm nws qhov zoo thiab ntseeg tau yuav tsum nruj heev. Ntxiv nrog rau cov khoom tshuaj xyuas niaj hnub no, lwm yam khoom tshuaj xyuas tseem suav nrog cov hauv qab no: tus neeg xyuas pib tsis kam, metallization los ntawm qhov tsis kam, sab hauv luv Circuit Court thiab qhib Circuit Court, rwb thaiv tsev tsis kam ntawm cov kab, txheej adhesion zog, adhesion, thermal cuam tshuam tsis kam, txhua yam cuam ​​tshuam lub zog cuam tshuam, lub zog tam sim no, thiab lwm yam. Txhua qhov ntsuas yuav tsum tau txais los ntawm kev siv cov cuab yeej tshwj xeeb thiab cov txheej txheem.