Raws li cov kws tshaj lij, peb tau xav txog txhua txoj hauv kev uas lub kaw lus tuaj yeem ua tsis tiav, thiab thaum nws ua tsis tiav, peb npaj kho nws. Zam kev ua yuam kev yog qhov tseem ceeb dua hauv kev tsim PCB. Hloov lub rooj tsav xwm hauv Circuit Court uas puas lawm hauv lub tshav pob tuaj yeem kim, thiab cov neeg siv khoom tsis txaus siab feem ntau yog kim dua. Qhov no yog ib qho laj thawj tseem ceeb uas yuav tsum nco ntsoov peb lub laj thawj tseem ceeb rau PCB kev puas tsuaj hauv cov txheej txheem tsim: kev tsim khoom tsis xws luag, ib puag ncig thiab tsim tsis txaus. Txawm hais tias qee yam ntawm cov xwm txheej no yuav tsis muaj kev tswj hwm, ntau yam tuaj yeem txo qis thaum lub sijhawm tsim. Qhov no yog vim li cas kev npaj rau qhov xwm txheej tsis zoo thaum lub sijhawm tsim qauv tuaj yeem pab koj lub rooj tsavxwm ua haujlwm tau zoo.

01 Manufacturing defect

Ib qho laj thawj rau PCB tsim pawg thawj coj saib puas yog vim kev tsim khoom tsis raug. Cov kev tsis zoo no tuaj yeem nrhiav tau yooj yim, thiab tseem nyuaj dua los kho ib zaug pom. Txawm hais tias qee qhov ntawm lawv tuaj yeem tsim tau, lwm tus yuav tsum tau kho los ntawm cov chaw tsim khoom cog lus (CM).

02 Environmental factor

Lwm qhov ua rau PCB tsim tsis ua haujlwm yog qhov chaw ua haujlwm. Yog li ntawd, nws yog ib qho tseem ceeb heev los tsim lub rooj tsav xwm Circuit Court thiab rooj plaub raws li ib puag ncig uas nws yuav ua haujlwm.

Thaum tshav kub kub: Circuit Court boards ua kom sov thiab feem ntau raug tshav kub thaum ua haujlwm. Xav txog seb tus qauv PCB yuav ncig ncig nws lub qhov rooj, raug tshav ntuj thiab sab nraum zoov kub, lossis nqus cua sov los ntawm lwm qhov chaw nyob ze. Kev hloov ntawm qhov kub thiab txias tuaj yeem tawg cov pob qij txha, cov khoom siv hauv paus thiab txawm tias lub tsev. Yog tias koj lub voj voog raug kub hnyiab, koj yuav tsum tau kawm txog cov khoom hauv lub qhov, uas feem ntau ua kom sov dua li SMT.

Plua plav: Plua plav yog cov bane ntawm cov khoom siv hluav taws xob. Xyuas kom meej tias koj rooj plaub muaj qhov tseeb IP ntsuam xyuas thiab / lossis xaiv cov khoom siv uas tuaj yeem tswj cov plua plav hauv qhov chaw ua haujlwm thiab / lossis siv cov txheej txheem sib xws.

Moisture: Cov av noo ua rau muaj kev hem thawj rau cov khoom siv hluav taws xob. Yog tias tus qauv PCB ua haujlwm nyob rau hauv qhov chaw ntub dej uas qhov kub hloov pauv sai, cov dej noo yuav condense ntawm huab cua mus rau hauv Circuit Court. Yog li ntawd, nws yog ib qho tseem ceeb los xyuas kom meej tias cov txheej txheem dej-pov thawj tau koom ua ke thoob plaws hauv Circuit Board qauv thiab ua ntej kev teeb tsa.

Kev co lub cev: Muaj qhov laj thawj rau cov khoom siv hluav taws xob ruaj khov uas tib neeg muab pov rau hauv pob zeb lossis pob zeb hauv pem teb. Thaum lub sijhawm ua haujlwm, ntau yam khoom siv raug rau lub cev poob siab lossis kev co. Koj yuav tsum xaiv cov txee, cov rooj sib tham hauv Circuit Court thiab cov khoom siv raws li kev ua haujlwm ntawm kev siv tshuab los daws qhov teeb meem no.

03 Tsis yog tus qauv tsim

Qhov kawg ntawm PCB tsim board puas tsuaj thaum lub sijhawm ua haujlwm yog qhov tseem ceeb tshaj plaws: tsim. Yog tias tus engineer lub hom phiaj tsis tshwj xeeb kom ua tau raws li nws cov hom phiaj kev ua tau zoo; suav nrog kev ntseeg siab thiab kev ua neej ntev, qhov no tsuas yog tawm mus. Yog tias koj xav kom koj lub rooj tsav xwm hauv Circuit Court kav ntev, nco ntsoov xaiv cov khoom thiab cov khoom siv, nteg tawm lub rooj tsav xwm hauv Circuit Court, thiab xyuas cov qauv tsim raws li cov kev cai tshwj xeeb ntawm kev tsim.

Kev xaiv cov khoom siv: dhau sijhawm, cov khoom yuav ua tsis tiav lossis tso tseg kev tsim khoom; txawm li cas los xij, nws tsis tuaj yeem lees txais qhov tsis ua haujlwm no tshwm sim ua ntej lub sijhawm xav tau ntawm lub rooj tsavxwm tas sijhawm. Yog li ntawd, koj qhov kev xaiv yuav tsum ua kom tau raws li qhov yuav tsum tau ua ntawm nws ib puag ncig thiab muaj kev tiv thaiv lub neej txaus thaum lub sijhawm tsim khoom lub neej ntawm lub rooj tsav xwm Circuit Court.

Kev xaiv cov khoom siv: Ib yam li kev ua haujlwm ntawm cov khoom yuav ua tsis tau raws sijhawm, yog li kev ua haujlwm ntawm cov khoom siv. Thaum tshav kub kub, thermal cycling, ultraviolet lub teeb, thiab txhua yam kev nyuaj siab yuav ua rau lub Circuit Court degradation thiab tsis ua hauj lwm ntxov ntxov. Yog li ntawd, koj yuav tsum xaiv cov khoom siv hluav taws xob hauv Circuit Court nrog cov ntawv luam tawm zoo raws li hom Circuit Board. Qhov no txhais tau hais tias xav txog cov khoom siv thiab siv cov khoom siv tsis zoo tshaj plaws uas tsim nyog rau koj tus qauv tsim.

PCB tsim layout: Tsis paub meej PCB tsim layout kuj yog lub hauv paus ua rau Circuit Court board tsis ua hauj lwm thaum lub sij hawm ua hauj lwm. Piv txwv li, cov kev sib tw tshwj xeeb tsis suav nrog cov khoom siv hluav taws xob siab; xws li high-voltage arc taug qab tus nqi, yuav ua rau lub rooj tsav xwm Circuit Court thiab kev puas tsuaj, thiab txawm ua rau raug mob rau cov neeg ua haujlwm.

Tsim kev txheeb xyuas: Qhov no tej zaum yuav yog kauj ruam tseem ceeb tshaj plaws hauv kev tsim lub voj voog uas muaj kev ntseeg siab. Ua DFM kuaj nrog koj tus CM tshwj xeeb. Qee cov CMs tuaj yeem tswj tau nruj dua thiab ua haujlwm nrog cov ntaub ntawv tshwj xeeb, thaum lwm tus ua tsis tau. Ua ntej koj pib tsim khoom, xyuas kom meej tias CM tuaj yeem tsim koj lub rooj tsav xwm Circuit Court raws li qhov koj xav tau, uas yuav ua kom paub tseeb tias qhov zoo dua PCB tsim A yuav tsis poob.

Nws tsis yog qhov nthuav kom xav txog qhov xwm txheej phem tshaj plaws rau PCB tsim. Paub tias koj tau tsim lub rooj tsavxwm txhim khu kev qha, nws yuav tsis poob thaum lub rooj tsavxwm raug xa mus rau cov neeg siv khoom. Nco ntsoov peb lub laj thawj tseem ceeb rau PCB tsim kev puas tsuaj kom koj tuaj yeem tau txais lub rooj tsav xwm zoo sib xws thiab txhim khu kev qha. Nco ntsoov npaj rau kev tsim khoom tsis xws luag thiab ib puag ncig los ntawm qhov pib, thiab tsom mus rau kev txiav txim siab tsim qauv rau cov xwm txheej tshwj xeeb.