1. Vim li cas thiaj siv cov khoom siv hluav taws xob ceramic
Ordinary PCB feem ntau yog ua los ntawm tooj liab ntawv ci thiab substrate bonding, thiab cov khoom siv substrate feem ntau yog iav fiber ntau (FR-4), phenolic resin (FR-3) thiab lwm yam ntaub ntawv, nplaum feem ntau yog phenolic, epoxy, thiab lwm yam. Kev ua haujlwm ntawm PCB vim muaj kev ntxhov siab, tshuaj lom neeg, cov txheej txheem tsim khoom tsis raug thiab lwm yam laj thawj, lossis hauv cov txheej txheem tsim vim yog ob sab ntawm tooj liab asymmetry, nws yog ib qho yooj yim uas yuav ua rau muaj kev sib txawv ntawm warping PCB board.
PCB Twist
Thiab lwm lub PCB substrate - ceramic substrate, vim qhov kev ua haujlwm kub dissipation, lub peev xwm nqa tam sim no, rwb thaiv tsev, thermal expansion coefficient, thiab lwm yam, zoo dua li cov iav fiber ntau PCB pawg thawj coj saib, yog li nws yog dav siv nyob rau hauv high-power electronics modules. , aerospace, tub rog electronics thiab lwm yam khoom.
Ceramic substrate
Nrog zoo tib yam PCB siv nplaum tooj liab ntawv ci thiab substrate bonding, ceramic PCB nyob rau hauv qhov kub thiab txias ib puag ncig, los ntawm txoj kev ntawm bonding tooj liab ntawv ci thiab ceramic substrate pieced ua ke, muaj zog binding quab yuam, tooj liab ntawv nyiaj yuav tsis poob, muaj kev ntseeg siab, ruaj khov kev ua tau zoo nyob rau hauv siab. kub, high humidity ib puag ncig
2. Cov khoom tseem ceeb ntawm ceramic substrate
Alumina (Al2O3)
Alumina yog cov khoom siv feem ntau siv hauv cov khoom siv ceramic, vim hais tias nyob rau hauv txhua yam, thermal thiab hluav taws xob zog piv rau feem ntau lwm yam oxide ceramics, siab zog thiab tshuaj stability, thiab nplua nuj qhov chaw ntawm raw cov ntaub ntawv, haum rau ntau yam technology manufacturing thiab sib txawv duab. .Raws li feem pua ntawm alumina (Al2O3) tuaj yeem muab faib ua 75 plooj (porcelain), 96 plooj (porcelain), 99.5 plooj (porcelain).Cov khoom hluav taws xob ntawm alumina yuav luag tsis cuam tshuam los ntawm cov ntsiab lus sib txawv ntawm alumina, tab sis nws cov khoom siv hluav taws xob thiab thermal conductivity hloov pauv zoo heev.Lub substrate nrog tsawg purity muaj ntau iav thiab loj dua nto roughness.Qhov siab dua qhov purity ntawm substrate, ntau smoother, compact, nruab nrab poob qis, tab sis tus nqi kuj siab dua.
Tom ntej: Beryllium Oxide (BeO)
Nws muaj cov thermal conductivity ntau dua li cov hlau txhuas, thiab siv rau hauv cov xwm txheej uas xav tau thermal conductivity siab.Nws txo qis sai tom qab qhov kub siab tshaj 300 ℃, tab sis nws txoj kev loj hlob yog txwv los ntawm nws cov toxicity.
Aluminium nitride (AlN)
Aluminium nitride ceramics yog ceramics nrog txhuas nitride hmoov ua lub ntsiab crystalline theem.Piv nrog alumina ceramic substrate, rwb thaiv tsev tsis kam, rwb thaiv tsev tiv taus ntau dua voltage, qis dielectric tas li.Nws cov thermal conductivity yog 7 ~ 10 npaug ntawm Al2O3, thiab nws cov thermal expansion coefficient (CTE) yog kwv yees nrog silicon nti, uas yog ib qho tseem ceeb heev rau high-power semiconductor chips.Nyob rau hauv cov txheej txheem ntau lawm, lub thermal conductivity ntawm AlN yog heev cuam tshuam los ntawm cov ntsiab lus ntawm residual oxygen impurities, thiab cov thermal conductivity tuaj yeem ua rau kom txo tau cov ntsiab lus oxygen.Tam sim no, thermal conductivity ntawm cov txheej txheem
Raws li cov laj thawj saum toj no, nws tuaj yeem paub tias alumina ceramics yog nyob rau hauv kev ua haujlwm ntawm microelectronics, fais fab electronics, mix microelectronics thiab fais fab modules vim lawv cov kev ua tau zoo tshaj plaws.
Piv nrog rau kev ua lag luam ntawm tib qhov loj me (100mm × 100mm × 1mm), cov khoom sib txawv ntawm cov khoom siv hluav taws xob sib txawv: 96% alumina 9.5 yuan, 99% alumina 18 yuan, aluminium nitride 150 yuan, beryllium oxide 650 yuan, nws tuaj yeem pom tau tias tus nqi sib txawv ntawm cov substrates sib txawv kuj tseem loj
3. Qhov zoo thiab qhov tsis zoo ntawm ceramic PCB
Qhov zoo
- Loj tam sim no nqa peev xwm, 100A tam sim no tsis tu ncua los ntawm 1mm 0.3mm tuab tooj liab lub cev, kub nce txog 17 ℃
- Qhov kub nce tsuas yog li 5 ℃ thaum 100A tam sim no tsis tu ncua hla 2 hli 0.3 hli tuab tooj liab lub cev.
- Kev ua tau zoo dua cov cua sov dissipation, qis thermal expansion coefficient, ruaj khov zoo, tsis yooj yim rau warping.
- Zoo rwb thaiv tsev, siab voltage kuj, los xyuas kom meej tus kheej kev nyab xeeb thiab khoom siv.
Qhov tsis zoo
Fragility yog ib qho ntawm qhov tsis zoo, uas ua rau tsuas yog ua cov laug cam me me xwb.
Tus nqi yog kim, qhov yuav tsum tau ntawm cov khoom siv hluav taws xob ntau thiab ntau txoj cai, ceramic circuit board los yog siv nyob rau hauv qee yam ntawm cov khoom siv high-end, cov khoom qis kawg yuav tsis siv txhua.
4. Kev siv cov ceramic PCB
ib.Siab zog hluav taws xob module, hnub ci vaj huam sib luag module, thiab lwm yam
- High zaus hloov fais fab mov, khoom lub xeev relay
- Automotive electronics, aerospace, tub rog electronics
- High zog LED teeb pom kev zoo khoom
- Kev sib txuas lus kav hlau txais xov