PCB tooj liab hlau poob tawm (tseem hu ua dumping tooj liab). PCB cov chaw tsim khoom txhua tus hais tias nws yog qhov teeb meem laminate thiab xav kom lawv cov chaw tsim khoom lag luam kom poob qis.

1. Cov ntawv ci tooj liab yog over-etched. 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). Feem ntau muab pov tseg tooj liab feem ntau yog galvanized tooj liab saum 70um Ntawv Nyiaj, ntawv ci liab thiab cov hmoov tshauv hauv qab 18um yeej tsis muaj batch tooj liab rejection. Thaum cov neeg siv khoom tsim hluav taws xob zoo dua li cov kab etching, yog tias cov ntawv ci tooj liab tau hloov pauv, tab sis cov etching tsis hloov, lub sij hawm nyob ntawm cov ntawv ci tooj liab hauv cov tshuaj etching yog ntev dhau lawm. Vim tias zinc yog Ameslikas yog cov hlau ua haujlwm, thaum tooj liab hlau ntawm PCB tau muab tso rau hauv cov tshuaj etching rau lub sijhawm ntev, nws yuav ua rau muaj kev cuam tshuam ntau dhau ntawm Circuit Court, ua rau qee qhov nyias nyias ntawm cov zinc txheej rov qab los ua kom tiav thiab cais los ntawm substrate. Ntawd yog, cov hlau tooj liab poob. Lwm qhov teeb meem yog tias tsis muaj teeb meem nrog PCB etching tsis, tab sis tom qab lub etching yog ntxuav nrog dej thiab tsis qhuav, cov tooj liab hlau tseem nyob ib puag ncig los ntawm cov residual etching tov 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. Pov tus tooj liab. Qhov xwm txheej no feem ntau pom tau tias yog tsom rau ntawm cov kab nyias nyias, lossis thaum lub sijhawm huab cua ntub, cov teeb meem zoo sib xws yuav tshwm sim rau tag nrho PCB. Tshem cov tooj liab kom pom tias cov xim ntawm qhov chaw sib cuag nrog lub hauv paus txheej (lub npe hu ua roughened nto) tau hloov. Cov xim ntawm cov ntawv ci tooj liab txawv ntawm cov ntawv ci tooj liab. Thawj cov xim tooj liab ntawm cov txheej hauv qab yog pom, thiab lub zog tev ntawm cov ntawv ci tooj liab ntawm cov kab tuab kuj yog qhov qub.

2. Ib qho kev sib tsoo tshwm sim hauv cheeb tsam hauv cov txheej txheem PCB, thiab cov hlau tooj liab tau sib cais los ntawm cov substrate los ntawm cov khoom siv sab nraud. Qhov kev ua haujlwm tsis zoo no yog qhov chaw tsis zoo lossis kev taw qhia. Cov xaim tooj liab poob yuav muaj qhov pom tseeb twisting lossis khawb / cuam tshuam cov cim 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. ntawm cov ntawv ci tooj liab yog qhov qub.

3. Lub PCB Circuit Court tsim tsis tsim nyog. Yog tias cov ntawv ci tooj liab tuab yog siv los tsim ib lub voj voog uas nyias dhau lawm, nws tseem yuav ua rau lub voj voog ntau dhau thiab tsis lees txais tooj liab.

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

Nyob rau hauv ib txwm muaj xwm txheej, tsuav yog lub laminate yog kub nias rau ntau tshaj 30 feeb, cov ntawv ci tooj liab thiab prepreg yuav pib ua ke tag nrho, yog li cov xovxwm feem ntau tsis cuam tshuam rau lub zog sib txuas ntawm cov ntawv ci tooj liab thiab cov substrate hauv laminate. . Txawm li cas los xij, nyob rau hauv cov txheej txheem ntawm stacking thiab stacking laminates, yog tias PP yog kab mob los yog cov ntawv ci tooj liab puas lawm, lub zog sib txuas ntawm cov ntawv ci tooj liab thiab cov substrate tom qab lamination kuj yuav tsis txaus, uas ua rau qhov chaw (tsuas yog rau cov phaj loj) cov lus. ) lossis 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, cov khoom siv electrolytic tooj liab zoo tib yam yog txhua yam khoom uas tau raug galvanized lossis tooj liab-plated. Yog hais tias lub ncov yog txawv txav thaum lub sij hawm tsim cov ntaub plaub, los yog thaum lub sij hawm galvanizing / tooj liab plating, lub plating siv lead ua ceg tsis zoo, ua rau cov tooj liab ntawv ci nws tus kheej lub tev lub zog tsis txaus. Thaum cov ntaub ntawv tsis zoo nias cov ntaub ntawv yog tsim rau hauv PCB thiab ntsaws rau hauv lub tshuab hluav taws xob, cov hlau tooj liab yuav poob vim muaj kev cuam tshuam ntawm kev quab yuam sab nraud. Qhov zoo ntawm qhov tsis zoo tooj liab tsis kam yuav tsis ua rau pom tseeb sab corrosion tom qab tev cov tooj liab hlau kom pom qhov ntxhib ntawm cov ntawv ci tooj liab (uas yog, qhov chaw sib cuag nrog lub substrate), tab sis lub zog tev ntawm tag nrho cov ntawv ci tooj liab yuav tsis zoo. .

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, tau siv tam sim no vim muaj cov tshuab sib txawv. Tus neeg sawv cev kho siv feem ntau yog PN cob, thiab cov qauv ntawm cov saw molecular yog yooj yim. Lub degree ntawm crosslinking yog tsawg, thiab nws yog ib qho tsim nyog yuav tsum 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 haum rau cov txheej txheem resin, ua rau lub zog tsis txaus ntawm cov ntawv hlau-clad hlau ntawv ci, thiab cov hlau tsis zoo tooj liab xaim thaum ntxig.