Luv luv qhia ntawm peb:
BQC ua haujlwm raws li EMS tus muag khoom muaj suab npeMuab kev pabcuam dav dav ntawm cov ntawv luam tawm Circuit board Assembly (PCBA), cov cuab yeej ua haujlwm, lub thawv tsim thiab lwm yam ， Raws li peb lub zog tseem ceeb ， peb muaj qee yam kev paub txog kev yos hav zoov hloov chaw rau IC ， uas tuaj yeem pab peb cov neeg siv txo tus nqi immensely.
Kev Paub Txog Lub Tuam Txhab:
Peb qho laj thawj los piav qhia vim li cas PCB tooj liab poob tawm
1. PCB ua haujlwm txheej txheem txheej txheem
1. Cov ntawv ci tooj liab tau dhau-etched. Cov electrolytic tooj liab foils siv nyob rau hauv kev ua lag luam feem ntau yog ib leeg-ib tog galvanized (feem ntau hu ua ashing ntawv ci) thiab ib leeg-ib tog tooj liab plating (feem ntau hu ua liab ntawv ci). Cov tooj liab pov tseg feem ntau tshaj li 70um galvanized tooj liab ntawv ci, ntawv ci liab thiab cov ntawv ci tshauv hauv qab 18um cia li tsis muaj kev cuam tshuam tooj liab tooj liab.
Thaum cov neeg siv khoom tsim hluav taws xob tsim zoo dua li txoj kab etching, yog tias cov ntawv ci tooj liab tshwj xeeb tau hloov pauv tab sis cov ciam etching tseem tsis hloov, qhov chaw nyob lub sijhawm ntawm cov ntawv ci tooj liab hauv cov kua dej etching yog ntev dhau. Vim tias zinc yog ib txwm muaj hlau, thaum lub tooj liab tooj liab ntawm lub LED tshaj tawm xov xwm PCB tau muab tso rau hauv kev daws teeb meem ntev ntev, nws yuav zam dhau kev ua xeb ntau dhau ntawm lub Circuit Court, ua rau qee qhov hluav taws xob rov qab zinc txheej yuav ua tiav reacted thiab sib cuag nrog cov substrate. Cov khoom siv cais tawm, uas yog, lub tooj liab hlau poob tawm.
Lwm qhov xwm txheej yog tias tsis muaj teeb meem nrog cov txheej txheem PCB etching, tab sis cov tooj liab tooj liab tseem nyob ib puag ncig los ntawm cov tshuaj uas tseem tsis tau txuas ntxiv rau sab hauv PCB tom qab lub etching, thiab cov tooj liab xaim kuj tseem nyob nrog cov residual etching daws ntawm PCB nto. Cov. Pov tus tooj. Cov xwm txheej no feem ntau ua kom pom tseeb raws li kev tsom rau ntawm cov kab nyias, lossis thaum lub sijhawm huab cua ntub, cov tsis xws luag yuav tshwm sim rau tag nrho PCB. Sawb tus tooj liab xaim pom tias cov xim ntawm kev sib cuag nrog lub hauv paus txheej (qhov thiaj li hu ua roughened nto) tau hloov. Cov xim ntawm tooj liab ntawv ci yog qhov txawv ntawm cov ntawv ci tooj liab zoo li qub. Tus thawj tooj liab xim ntawm cov hauv qab txheej yog pom, thiab lub zog ntawm peeling ntawm cov ntawv ci tooj liab ntawm cov kab tuab tseem yog qhov qub.
2. Ib feem ntawm kev sib tsoo tshwm sim hauv PCB txheej txheem ntawm LED tshaj tawm ntawm kev tshuaj ntsuam LED, thiab cov xov tooj liab tau raug cais los ntawm cov khoom siv hauv paus los ntawm kev siv dag zog sab nraud. Txoj haujlwm tsis zoo no yog qhov chaw tsis zoo lossis tsis ua haujlwm, cov tooj liab yuav ua rau pom tseeb, lossis khawb / cuam tshuam rau tib qho kev taw qhia. Yog tias koj tev tawm ntawm cov xaim tooj liab ntawm qhov chaw tsis zoo thiab saib ntawm qhov ntxhib ntawm tooj liab ntawv ci, koj tuaj yeem pom tias cov xim ntawm qhov ntxhib ntawm tooj liab ntawv yog qhov qub, yuav tsis muaj sab yaig, thiab tev tawv ntxiv ntawm tooj liab ntawv ci yog qhov qub.
3. Lub PCB Circuit Court tsim ntawm LED tshaj tawm ntawm kev tshaj tawm LED yog qhov tsis tsim nyog. Yog tias cov ntawv ci tooj liab tuab siv los tsim lub Circuit Court uas dhau nyias, nws kuj tseem yuav ua rau lub Circuit Court dhau los thiab lub tooj liab yuav raug pov tseg.
Thib ob, vim li cas rau cov txheej txheem laminate
Nyob rau hauv ib txwm muaj xwm txheej, cov ntawv ci tooj liab thiab prepreg yuav cia li sib txuas kiag li tsuav yog qhov kub ntawm ntu ntawm laminate yog kub nias rau ntau dua 30 feeb, yog li cov nias feem ntau yuav tsis cuam tshuam rau qhov sib txuas lub zog ntawm cov ntawv ci tooj liab thiab substrate nyob rau hauv laminate. Txawm li cas los xij, nyob rau hauv cov txheej txheem ntawm cov pawg thiab cov pawg laminates, yog tias PP tiv thaiv lossis qhov matte saum npoo ntawm cov ntawv ci tooj liab yog qhov puas ntsoog, nws tseem yuav ua rau lub cev tsis muaj zog txaus ntawm cov ntawv ci tooj liab thiab lub substrate tom qab lamination, uas ua rau muab tso rau (tsuas yog rau cov paib loj loj (Cov lus loj) Cov lus) lossis cov xaim tooj liab sib tsoo poob tawm, tab sis cov tev lub zog ntawm cov ntawv ci tooj liab nyob ze rau cov off-line tsis yog qhov txawv txav.
3. Vim li cas rau laminate raw khoom
1. Nws tau hais txog ntawm LED qhov screen tshaj tawm tias hluav taws xob hluav taws xob tooj liab zoo nkauj yog txhua cov khoom lag luam uas tau galvanized lossis tooj-plated ntawm ntaub plaub. Yog tias qhov siab kawg tus nqi ntawm cov ntawv xov plaub yog qhov txawv txav thaum lub sij hawm ntau lawm, lossis thaum galvanizing / tooj liab plating, plating siv lead ua ceg tsis zoo, ua rau tooj liab. Lub cev tev ntawm daim ntawv ci nws tus kheej tsis txaus. Tom qab cov ntawv ci phem tau nias rau hauv PCB thiab ntsaws rau hauv lub tshuab hluav taws xob, cov tooj liab yuav poob vim qhov cuam tshuam los ntawm sab nraud quab yuam. Qhov no tsis zoo ntawm tooj liab tsis kam yuav tsis ua rau pom kev tsis ncaj ncees tom qab tev tooj liab xaim pom qhov ntxhib ntawm tooj liab ntawv (uas yog, qhov chaw tiv tauj nrog cov txheej hauv qab), tab sis tev lub zog ntawm cov ntawv ci tooj liab tag nrho yuav heev txom nyem.
2. Qhov tsis zoo hloov ntawm cov tooj liab ntawm cov ntawv tshaj tawm ntawm LED tshaj tawm mus rau qhov hnyav: qee cov ntawv laminates nrog cov khoom tshwj xeeb, xws li cov nplooj ntawv HTg, tam sim no siv vim yog cov txheej txheem sib txawv, cov khoom siv ua kom zoo yog feem ntau PN cob, thiab cov roj molecular saw cov qauv yog qhov yooj yim, Cov qib ntawm qhov sib txuas sib txuas yog tsawg thaum kho, thiab nws yog qhov yuav tsum tau siv cov ntawv ci tooj liab nrog lub ncov tshwj xeeb kom phim nws. Thaum tsim cov laminates, kev siv cov ntawv ci tooj liab tsis sib xws rau cov kab ke, uas ua rau lub cev tsis muaj zog txaus ntawm cov ntawv hlau-clad hlau ntawv, thiab cov tooj liab tsis zoo hlau txaws thaum ntxig.
Daim ntawv txuas nrog - https: //blog.csdn.net/weixin_28706423/article/details/112492648
Cim npe nrov: pcba ntawm cov khoom siv xeem, Tuam Tshoj, tuam ntxhab, lub Hoobkas, lag luam customized
