Cov txhuas substrate yog cov tooj liab-based tooj liab clad laminate nrog cua sov dissipation muaj nuj nqi. Nws yog cov khoom zoo li phaj ua los ntawm cov khoom siv hluav taws xob nrog cov khoom ci, thiab ob sab Kangxin Circuit Court qhia cov kev ua tau zoo ntawm txhuas substrate thiab cov khoom siv saum npoo av.
Aluminium substrate kev ua tau zoo
1.Txhais kev ua haujlwm kub disspipation
Aluminium raws li tooj liab-clad daim hlau muaj tshav kub ua tau zoo tshaj plaws, uas yog qhov tshwj xeeb tshaj plaws ntawm hom phaj no. Tus pcb ua los ntawm nws tsis tuaj yeem tiv thaiv kev ua haujlwm kub ntawm cov tib neeg thiab cov hluav taws xob kom nrawm nrawm nrawm dua thiab cov hluav taws xob loj loj. Nws tseem yog faib tawm vim tias nws cov ntom ntom me me, qhov hnyav (2.7g / cm3), anti-oxidation, thiab ntau tshaj plaws ntawm composite daim ntawv nyob rau hauv hlau-based tooj liab laminates. Lub noo noo thermal tsis kam ntawm insulated txhuas substrate yog 1.10 ℃ / w thiab cov cua sov ua kom zoo nkauj tam sim no ntawm lub tooj liab tooj liab.
2.Qhov cov kev ua tau zoo thiab zoo ntawm kev machining
Aluminium raws tus tooj liab yaj yaj tau muaj lub zog kho tshuab zog thiab tawv, uas yog qhov zoo dua li cov tsiaj nyaum liab thiab ceramic substrates. Nws tuaj yeem paub qhov tsim ntawm loj-thaj chaw luam tawm cov laug cam ntawm cov hlau me me, thiab yog tsim tshwj xeeb rau cov khoom siv hnyav ntawm cov khoom siv hnyav. Tsis tas li ntawd, cov txheej txheem aluminium kuj tseem muaj kev sib sau ua ke zoo, thiab sib xyaw ua ke ntawm cov pcb uas tsis yog sib dhos, thaum cov khoom siv hluav taws xob tsis sib haum.
3. siv lub cev ruaj khov
Rau ntau tus tooj liab clad laminates, muaj teeb meem ntawm cov kev nthuav dav kub (z-axis) ntawm lub rooj tsavxwm, uas cuam tshuam rau qhov zoo ntawm Metallized Qhov thiab Hlau. Qhov laj thawj tseem ceeb yog tias txoj kab kev nthuav dav coefficients ntawm cov phaj sib txawv, ua rau lub cim tooj liab thiab ua rau lub ntsej muag tooj liab los tsoo lossis puas. Cov kab nthuav dav ntawm cov txheej txheem aluminium yog nruab nrab, nws yog qhov ntau dua li cov ntawv loj me, thiab yog qhov ua kom ze rau cov tooj liab, uas yog qhov ua kom zoo nkauj ntawm tooj liab thiab kev ntseeg tau ntawm cov ntawv luam tawm.
Nto Kho ntawm txhuas cov khoom siv substrate
1. Kev muag khoom
Qhov saum npoo ntawm phaj txhuas-raws li coated nrog cov txheej roj thaum ua haujlwm thiab kev thauj mus los, thiab nws yuav tsum tau ntxuav ua ntej siv. Lub hauv paus ntsiab lus yog siv roj av (dav dav avoline) raws li cov kuab tshuaj, uas tuaj yeem ua kom yaj, thiab tom qab ntawd siv cov dej-soluble tu tus neeg sawv cev kom tshem cov roj stains. Yaug rau saum npoo nrog dej ntws kom nws ntxuav thiab tsis txhob haus dej.
2. Defase
Cov txhuas substrate tom qab kev kho mob saum toj no tseem muaj roj tsis muaj nyob rau saum npoo. Txhawm rau kom tshem tawm nws, soak nws nrog muaj zog alkali sodium hydrocide ntawm 50 ° C rau 5 feeb, thiab tom qab ntawd yaug nrog dej huv.
3. Alkaline etching. Qhov saum npoo ntawm lub phaj txhuas zoo li cov khoom siv hauv paus yuav tsum muaj qee yam ntxhib. Txij li txhuas substrate thiab aluminium oxide cov duab zaj duab xis txheej ntawm cov ntaub ntawv ampicened, ntawm cov khoom siv acidic, alkaline lossis sib xyaw ua ke alkaline tov. Tsis tas li ntawd, lwm yam tshuaj thiab cov ntxiv yuav tsum tau muab ntxiv rau cov tshuaj roughening kom ua tiav cov hom phiaj hauv qab no.
4. Kev tshuaj xyuas cov pa polishing (ntsw). Vim hais tias cov khoom siv txhuas muaj lwm cov neeg impurity, nws yog ib qho yooj yim los ua cov txheej txheem inorganic, yog li cov inorgenat cov txheej txheem tsim nyob rau saum npoo yuav tsum tau tshuaj ntsuam. Raws li kev soj ntsuam cov txiaj ntsig, npaj cov kev daws teeb meem haum, thiab muab cov roughled ua kom meej nyob rau hauv lub sij hawm dipping kev daws teeb meem, kom cov npoo ntawm lub phaj aluminium huv si thiab ci.
