Cov ntawv ci tooj liabmuaj qhov nrawm qis ntawm cov pa oxygen saum npoo thiab tuaj yeem txuas nrog ntau yam khoom sib txawv, xws li hlau, cov ntaub ntawv rwb thaiv tsev. Thiab cov ntawv ci tooj liab feem ntau yog siv rau hauv kev tiv thaiv hluav taws xob thiab tiv thaiv hluav taws xob. Txhawm rau muab cov ntawv ci tooj liab conductive tso rau ntawm qhov chaw substrate thiab ua ke nrog cov hlau substrate, nws yuav muab kev sib txuas zoo heev thiab kev tiv thaiv hluav taws xob. Nws tuaj yeem muab faib ua: ntawv ci tooj liab uas nplaum nws tus kheej, ntawv ci tooj liab ib sab, ntawv ci tooj liab ob sab thiab lwm yam.

Hauv nqe lus no, yog tias koj xav kawm ntxiv txog cov ntawv ci tooj liab hauv cov txheej txheem tsim PCB, thov saib thiab nyeem cov ntsiab lus hauv qab no hauv nqe lus no kom paub ntau ntxiv txog kev tshaj lij.

Cov yam ntxwv ntawm cov ntawv ci tooj liab hauv kev tsim khoom PCB yog dab tsi?

PCB tooj liab ntawv ciyog qhov tuab tooj liab pib siv rau ntawm cov txheej sab nraud thiab sab hauv ntawm lub rooj tsavxwm PCB ntau txheej. Qhov hnyav tooj liab yog txhais tias yog qhov hnyav (hauv ooj) ntawm tooj liab uas muaj nyob rau hauv ib square foot ntawm thaj chaw. Cov txheej txheem no qhia txog qhov tuab tag nrho ntawm tooj liab ntawm txheej. MADPCB siv cov qhov hnyav tooj liab hauv qab no rau kev tsim PCB (pre-plate). Qhov hnyav ntsuas hauv oz/ft2. Qhov hnyav tooj liab tsim nyog tuaj yeem xaiv kom haum rau qhov xav tau tsim.

Hauv kev tsim PCB, cov ntawv ci tooj liab yog dov, uas yog qib hluav taws xob nrog kev ntshiab ntawm 99.7%, thiab tuab ntawm 1/3oz / ft2 (12μm lossis 0.47mil) - 2oz / ft2 (70μm lossis 2.8mil).

Cov ntawv ci tooj liab muaj qhov qis dua ntawm cov pa oxygen saum npoo av thiab tuaj yeem txuas ua ntej los ntawm cov chaw tsim khoom laminate rau ntau yam khoom siv hauv paus, xws li cov hlau tseem ceeb, polyimide, FR-4, PTFE thiab ceramic, los tsim cov ntawv ci tooj liab.

· Nws kuj tseem tuaj yeem raug qhia rau hauv lub rooj tsavxwm ntau txheej ua cov ntawv ci tooj liab nws tus kheej ua ntej nias.

· Hauv kev tsim PCB ib txwm muaj, qhov tuab tooj liab kawg ntawm cov txheej sab hauv tseem yog cov ntawv ci tooj liab thawj zaug; Ntawm cov txheej sab nraud peb phaj ntxiv 18-30μm tooj liab ntawm cov kab thaum lub sijhawm txheej txheem plating vaj huam sib luag.

· Cov tooj liab rau cov txheej sab nraud ntawm cov laug cam ntau txheej yog nyob rau hauv daim ntawv ntawm cov ntawv ci tooj liab thiab nias ua ke nrog cov prepregs lossis cores. Rau kev siv nrog microvias hauv HDI PCB, cov ntawv ci tooj liab yog ncaj qha rau ntawm RCC (resin coated copper).

Vim li cas cov ntawv ci tooj liab thiaj li xav tau hauv kev tsim khoom PCB?

Cov ntawv ci tooj liab qib hluav taws xob (qhov huv ntawm ntau dua 99.7%, tuab 5um-105um) yog ib qho ntawm cov ntaub ntawv tseem ceeb ntawm kev lag luam hluav taws xob. Kev txhim kho sai ntawm kev lag luam cov ntaub ntawv hluav taws xob, kev siv cov ntawv ci tooj liab qib hluav taws xob tab tom loj hlob, cov khoom lag luam tau siv dav hauv kev suav lej kev lag luam, cov khoom siv sib txuas lus, cov khoom siv QA, cov roj teeb lithium-ion, cov TV pej xeem, cov ntaub ntawv kaw video, CD players, cov tshuab luam ntawv, xov tooj, cua txias, cov khoom siv hluav taws xob hauv tsheb, cov khoom ua si consoles.

Cov ntawv ci tooj liab rau kev lag luammuaj peev xwm muab faib ua ob pawg: dov tooj liab ntawv ci (RA tooj liab ntawv ci) thiab taw tes tooj liab ntawv ci (ED tooj liab ntawv ci), uas cov ntawv ci tooj liab calendaring muaj qhov zoo ductility thiab lwm yam ntxwv, yog cov txheej txheem phaj mos thaum ntxov siv cov ntawv ci tooj liab, thaum cov ntawv ci tooj liab electrolytic yog tus nqi qis dua ntawm kev tsim cov ntawv ci tooj liab. Raws li cov ntawv ci tooj liab dov yog cov khoom siv raw tseem ceeb ntawm lub rooj tsavxwm mos, yog li cov yam ntxwv ntawm cov ntawv ci tooj liab calendaring thiab kev hloov pauv nqi ntawm kev lag luam mos mos muaj qee qhov cuam tshuam.

Cov cai tsim qauv yooj yim ntawm cov ntawv ci tooj liab hauv PCB yog dab tsi?

Koj puas paub tias cov laug cam luam tawm yog ib qho uas pom ntau heev hauv pawg khoom siv hluav taws xob? Kuv ntseeg tias muaj ib qho nyob rau hauv cov khoom siv hluav taws xob uas koj siv tam sim no. Txawm li cas los xij, kev siv cov khoom siv hluav taws xob no yam tsis nkag siab txog lawv cov thev naus laus zis thiab txoj kev tsim qauv kuj yog ib qho kev coj ua. Tib neeg siv cov khoom siv hluav taws xob txhua teev tab sis lawv tsis paub tias lawv ua haujlwm li cas. Yog li ntawm no yog qee qhov tseem ceeb ntawm PCB uas tau hais kom nkag siab sai txog cov laug cam luam tawm ua haujlwm li cas.

· Lub rooj tsavxwm luam tawm yog cov yas yooj yim uas muaj iav ntxiv rau. Cov ntawv ci tooj liab siv rau kev taug qab cov kev thiab nws tso cai rau kev ntws ntawm cov nqi thiab cov teeb liab hauv lub cuab yeej. Cov kab tooj liab yog txoj hauv kev los muab lub zog rau ntau yam khoom ntawm lub cuab yeej hluav taws xob. Hloov chaw ntawm cov xov hlau, cov kab tooj liab coj kev ntws ntawm cov nqi hauv PCBs.

· Cov PCBs muaj peev xwm ua tau ib txheej thiab ob txheej. Ib txheej PCB yog cov yooj yim. Lawv muaj cov ntawv ci tooj liab ntawm ib sab thiab sab tod yog qhov chaw rau lwm cov khoom. Thaum nyob ntawm PCB ob txheej, ob sab yog tseg rau cov ntawv ci tooj liab. Ob txheej yog cov PCBs nyuaj uas muaj cov cim nyuaj rau kev ntws ntawm cov nqi. Tsis muaj cov ntawv ci tooj liab tuaj yeem hla ib leeg. Cov PCBs no yog qhov xav tau rau cov khoom siv hluav taws xob hnyav.

· Kuj tseem muaj ob txheej ntawm cov solders thiab silkscreen ntawm tooj liab PCB. Lub ntsej muag solder siv los paub qhov txawv ntawm cov xim ntawm PCB. Muaj ntau xim ntawm PCBs muaj xws li ntsuab, ntshav, liab, thiab lwm yam. Lub ntsej muag solder kuj qhia txog tooj liab los ntawm lwm cov hlau kom nkag siab txog qhov nyuaj ntawm kev sib txuas. Thaum silkscreen yog cov ntawv nyeem ntawm PCB, cov ntawv sib txawv thiab cov lej tau sau rau ntawm silkscreen rau tus neeg siv thiab tus engineer.

Yuav ua li cas xaiv cov khoom siv kom zoo rau cov ntawv ci tooj liab hauv PCB?

Raws li tau hais ua ntej lawm, koj yuav tsum pom cov kauj ruam-rau-kauj ruam txoj hauv kev kom nkag siab txog cov qauv tsim khoom ntawm lub rooj tsavxwm luam tawm. Kev tsim cov laug cam no muaj ntau txheej sib txawv. Cia peb nkag siab qhov no nrog cov kab ke:

Cov khoom siv hauv qab:

Lub hauv paus ntawm lub rooj tsavxwm yas uas siv iav los ua lub substrate yog lub substrate. Lub substrate yog cov qauv dielectric ntawm daim ntawv feem ntau ua los ntawm cov epoxy resins thiab daim ntawv iav. Lub substrate yog tsim los rau hauv txoj kev uas nws tuaj yeem ua tau raws li qhov yuav tsum tau ua piv txwv li qhov kub hloov pauv (TG).

Kev Laminating:

Raws li pom tseeb los ntawm lub npe, lamination kuj yog ib txoj hauv kev kom tau txais cov khoom xav tau xws li thermal expansion, shear strength, thiab transition heat (TG). Lamination ua tiav hauv qab siab. Lamination thiab substrate ua ke ua lub luag haujlwm tseem ceeb hauv kev ntws ntawm cov nqi hluav taws xob hauv PCB.