Aluminium substrate yog hlau-raws li tooj liab clad laminate nrog zoo tshav kub dissipation muaj nuj nqi. Nws yog ib lub phaj zoo li cov khoom siv hluav taws xob iav fiber ntau daim ntaub los yog lwm yam ntaub ntawv txhawb impregnated nrog resin, ib qho resin, thiab lwm yam raws li ib qho insulating nplaum txheej, them nrog tooj liab ntawv ntawm ib los yog ob sab thiab kub nias, hu ua aluminium- raws tooj liab-clad phaj. Kangxin Circuit qhia txog kev ua haujlwm ntawm aluminium substrate thiab kev kho deg ntawm cov ntaub ntawv.
Kev ua haujlwm ntawm aluminium substrate
1.Excellent tshav kub dissipation kev ua tau zoo
Aluminium-raws li tooj liab-clad phaj muaj kev ua tau zoo ntawm cov cua kub dissipation, uas yog qhov tseem ceeb tshaj plaws ntawm cov phaj no. Lub PCB ua los ntawm nws tuaj yeem tsis tsuas yog tiv thaiv kev ua haujlwm kub ntawm cov khoom thiab cov substrates loaded ntawm nws los ntawm kev nce, tab sis kuj sai sai thaum tshav kub kub generated los ntawm lub hwj chim amplifier Cheebtsam, siab zog Cheebtsam, loj Circuit Court fais fab hloov thiab lwm yam Cheebtsam. 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 saturated thermal kuj ntawm insulated aluminium substrate yog 1.10 ℃ / W thiab thermal kuj yog 2.8 ℃ / W, uas zoo heev txhim kho lub fusing tam sim no ntawm tooj liab hlau.
2. Txhim kho qhov ua tau zoo thiab zoo ntawm machining
Aluminium-raws li tooj liab-clad laminates muaj cov neeg kho tshuab lub zog thiab toughness, uas yog zoo dua li cov resin-raws li tooj liab-clad laminates thiab ceramic substrates. Nws tuaj yeem paub txog kev tsim cov ntawv loj hauv cheeb tsam ntawm cov hlau substrates, thiab tshwj xeeb tshaj yog tsim rau mounting hnyav Cheebtsam ntawm cov substrates. Tsis tas li ntawd, aluminium substrate kuj muaj qhov zoo flatness, thiab nws tuaj yeem sib sau ua ke thiab ua tiav ntawm lub substrate los ntawm hammering, riveting, thiab lwm yam. Raws li tooj liab clad laminate tsis tuaj yeem.
3.High dimension stability
Rau ntau yam tooj liab clad laminates, muaj teeb meem ntawm thermal expansion (stabilization) , tshwj xeeb tshaj yog cov thermal expansion nyob rau hauv lub thickness kev taw qhia (Z-axis) ntawm lub rooj tsavxwm, uas cuam tshuam rau qhov zoo ntawm metallized qhov thiab thaiv. Qhov laj thawj tseem ceeb yog vim li cas cov kab hluav taws xob nthuav dav ntawm cov phiaj sib txawv, xws li tooj liab, thiab cov kab nthuav dav coefficient ntawm epoxy iav fiber ntau daim ntaub substrate yog 3. Cov linear expansion ntawm ob qhov sib txawv heev, uas yog ib qho yooj yim ua rau cov qhov sib txawv ntawm thermal expansion ntawm lub substrate, ua rau cov tooj liab Circuit Court thiab metallized qhov tawg los yog puas. Lub linear expansion coefficient ntawm aluminium substrate yog nyob nruab nrab ntawm, nws yog ntau me dua li cov resin substrate, thiab yog ze rau lub linear expansion coefficient ntawm tooj liab, uas yog conducive los xyuas kom meej qhov zoo thiab kev ntseeg siab ntawm cov luam Circuit Court.
Kev kho deg ntawm aluminium substrate khoom
1. Deoiling
Qhov saum npoo ntawm aluminium-raws li phaj yog coated nrog cov roj txheej thaum ua thiab kev thauj mus los, thiab nws yuav tsum tau ntxuav ua ntej siv. Lub hauv paus ntsiab lus yog siv cov roj av (cov roj av dav dav dav dav) ua cov kuab tshuaj, uas tuaj yeem yaj tau, thiab tom qab ntawd siv cov dej-soluble tu tus neeg saib xyuas kom tshem tawm cov roj stains. Yaug qhov chaw nrog dej ntws kom huv si thiab tsis muaj dej poob.
2. Degrease
Aluminium substrate tom qab kev kho mob saum toj no tseem muaj roj tsis tau tshem tawm ntawm qhov chaw. Txhawm rau tshem tawm tag nrho, tsau nws nrog alkali sodium hydroxide muaj zog ntawm 50 ° C rau 5 feeb, thiab tom qab ntawd yaug nrog dej huv.
3. Alkaline etching. Qhov saum npoo ntawm aluminium phaj raws li cov khoom siv hauv paus yuav tsum muaj qee yam roughness. Txij li thaum aluminium substrate thiab aluminium oxide zaj duab xis txheej rau ntawm qhov chaw yog ob qho tib si amphoteric cov ntaub ntawv, qhov saum npoo ntawm cov khoom siv aluminium tuaj yeem ua roughened los ntawm kev siv cov kua qaub, alkaline los yog composite alkaline tov system. Tsis tas li ntawd, lwm yam tshuaj thiab cov tshuaj ntxiv yuav tsum tau ntxiv rau cov tshuaj roughening kom ua tiav cov hom phiaj hauv qab no.
4. Tshuaj polishing (dipping). Vim hais tias cov khoom siv hauv aluminium muaj lwm yam impurity hlau, nws yog ib qho yooj yim los tsim inorganic tebchaw uas ua raws li qhov chaw ntawm lub substrate thaum lub sij hawm roughening txheej txheem, yog li cov inorganic tebchaw tsim nyob rau saum npoo yuav tsum tau soj ntsuam. Raws li kev txheeb xyuas cov txiaj ntsig, npaj cov tshuaj dipping tsim nyog, thiab tso cov roughened aluminium substrate rau hauv cov tshuaj dipping kom paub meej lub sijhawm, kom lub ntsej muag ntawm txhuas phaj yog huv si thiab ci.