cov PCB tooj liab hlau ntog tawm (uas yog, nws yog feem ntau hais tias cov tooj liab tau muab pov tseg), thiab tag nrho cov PCB hom yuav hais tias nws yog ib qho teeb meem nrog lub laminate thiab xav kom lawv cov nroj tsuag ntau lawm dais phem poob. Raws li kev paub ntau xyoo hauv kev tuav cov neeg siv khoom tsis txaus siab, feem ntau yog vim li cas rau PCB pov tseg yog raws li hauv qab no:

1. PCB Hoobkas txheej txheem txheej txheem:

1). Tshaj etching ntawm tooj liab ntawv ci.

Cov ntawv ci tooj liab electrolytic siv nyob rau hauv kev ua lag luam feem ntau yog ib leeg-sab galvanized (feem ntau hu ua ashing foil) thiab ib sab tooj liab-plated (feem ntau hu ua ntawv ci liab). Cov ntawv ci tooj liab feem ntau yog galvanized tooj liab ntawv ci tshaj 70um, ntawv ci liab thiab 18um. Cov ntawv ci hauv qab no muaj qhov pib tsis muaj batch tooj liab tsis lees paub. Thaum cov qauv tsim hluav taws xob zoo dua li cov kab etching, yog tias cov ntawv ci tooj liab tau hloov pauv yam tsis tau hloov pauv qhov etching, qhov no yuav ua rau cov ntawv ci tooj liab nyob hauv cov tshuaj etching ntev ntev.

Vim tias zinc yog Ameslikas yog cov hlau ua haujlwm, thaum tooj liab hlau ntawm PCB tau tsau rau hauv cov tshuaj etching rau lub sijhawm ntev, nws yuav ua rau muaj kev cuam tshuam ntau dhau ntawm lub Circuit Court, ua rau qee qhov nyias nyias ntawm cov zinc txheej rov qab los ua kom tag nrho thiab sib cais. lub substrate, uas yog, tooj liab hlau ntog tawm.

Lwm qhov xwm txheej yog tias tsis muaj teeb meem nrog PCB etching tsis, tab sis kev ntxuav thiab ziab tsis zoo tom qab etching, ua rau cov hlau tooj liab nyob ib puag ncig los ntawm cov tshuaj etching ntxiv rau ntawm PCB nto. Yog tias nws tsis tau ua tiav rau lub sijhawm ntev, nws tseem yuav ua rau sab etching ntawm cov tooj liab ntau dhau. tooj liab.

Qhov xwm txheej no feem ntau yog tsom rau ntawm cov kab nyias nyias, lossis thaum huab cua ntub, qhov tsis xws luag yuav tshwm sim ntawm tag nrho PCB. Tshem cov tooj liab kom pom tias cov xim ntawm nws qhov chaw sib cuag nrog lub hauv paus txheej (lub npe hu ua roughened nto) tau hloov, uas txawv ntawm qhov qub tooj liab. Cov xim ntawm cov ntawv ci txawv, cov xim tooj liab ntawm cov txheej hauv qab yog pom, thiab lub zog tev tawm ntawm cov ntawv ci tooj liab ntawm cov kab tuab kuj yog qhov qub.

2). Hauv kev tsim cov txheej txheem PCB, kev sib tsoo tshwm sim hauv zos, thiab cov hlau tooj liab tau sib cais los ntawm substrate los ntawm kev siv tshuab sab nraud.

Qhov kev ua haujlwm tsis zoo no muaj teeb meem nrog rau qhov chaw, thiab cov hlau tooj liab yuav pom tseeb twisted, los yog khawb los yog cuam tshuam cov cim nyob rau hauv tib txoj kev. Yog tias koj tev tawm ntawm cov hlau hlau ntawm qhov tsis xws luag thiab saib qhov ntxhib ntawm cov ntawv ci tooj liab, koj tuaj yeem pom tias cov xim ntawm cov tawv tawv ntawm cov ntawv ci tooj liab yog qhov qub, yuav tsis muaj kev yaig, thiab lub zog tev tawm. ntawm cov ntawv ci tooj liab yog qhov qub.

3). PCB Circuit Court tsim yog tsis tsim nyog.

Siv cov ntawv ci tooj liab tuab los tsim ib lub voj voog uas nyias dhau lawm yuav ua rau muaj kev cuam tshuam ntau dhau ntawm Circuit Court thiab pov tseg tooj liab.

2. Yog vim li cas rau laminate manufacturing txheej txheem:

Nyob rau hauv ib txwm muaj xwm txheej, cov ntawv ci tooj liab thiab cov prepreg yuav ua tiav tag nrho ntev li ntev raws li qhov kub siab ntawm lub laminate yog kub nias rau ntau tshaj 30 feeb, yog li cov xovxwm feem ntau yuav tsis cuam tshuam rau lub zog sib txuas ntawm cov ntawv ci tooj liab thiab cov ntawv xovxwm. substrate nyob rau hauv lub laminate. Txawm li cas los xij, nyob rau hauv tus txheej txheem ntawm stacking thiab stacking laminates, yog PP paug los yog tooj liab foil ntxhib nto puas, nws tseem yuav ua rau tsis txaus lub zog sib txuas ntawm cov ntawv ci tooj liab thiab lub substrate tom qab lamination, uas ua rau qhov sib txawv ntawm qhov chaw (tsuas yog rau cov phaj loj) Los yog sporadic tooj liab xov hlau poob, tab sis lub zog tev ntawm cov ntawv ci tooj liab nyob ze ntawm cov xov hlau tawm yuav tsis txawv txav.

3. Yog vim li cas rau laminate raw khoom:

1). Raws li tau hais los saum no, zoo tib yam electrolytic tooj liab foils yog tag nrho cov khoom uas tau galvanized los yog tooj liab-plated. Yog hais tias lub ncov tus nqi ntawm cov ntaub plaub yog txawv txav thaum lub sij hawm tsim khoom, los yog thaum galvanized / tooj liab-plated, lub plating siv lead ua ceg tsis zoo, ua rau cov ntawv ci tooj liab nws tus kheej lub zog tev tsis txaus. Tom qab cov ntaub ntawv tsis zoo nias cov ntaub ntawv yog ua rau hauv PCB, cov hlau tooj liab yuav poob thaum nws raug cuam tshuam los ntawm lwm lub zog thaum nws ntsaws rau hauv lub tshuab hluav taws xob. Qhov zoo ntawm qhov tsis zoo tooj liab tsis zoo no yuav tsis muaj qhov pom tseeb sab corrosion thaum tev cov tooj liab xaim kom pom qhov ntxhib ntawm cov ntawv ci tooj liab (uas yog, qhov chaw sib cuag nrog lub substrate), tab sis lub zog tev tawm ntawm tag nrho cov ntawv ci tooj liab yuav yog heev. pluag.

2). Kev hloov pauv tsis zoo ntawm cov ntawv ci tooj liab thiab cov resin: Qee cov laminates nrog cov khoom tshwj xeeb, xws li HTG nplooj ntawv, tam sim no siv. Vim yog cov txheej txheem sib txawv, tus neeg sawv cev kho siv feem ntau yog PN resin, thiab cov qauv ntawm cov saw molecular yog yooj yim. Lub degree ntawm kev sib txuas ntawm kev sib txuas yog qis, thiab nws yuav tsum tau siv cov ntawv ci tooj liab nrog lub ncov tshwj xeeb kom phim nws. Cov ntawv ci tooj liab siv hauv kev tsim cov laminates tsis sib haum rau cov txheej txheem resin, ua rau tsis txaus tev lub zog ntawm cov ntawv hlau-clad hlau ntawv ci, thiab tsis zoo tooj liab xaim xaim thaum lub ntsaws.