Silicon Nitride Ceramic Substrate

Silicon nitride ceramic substrate yog cov khoom siv tshwj xeeb uas siv dav hauv ntau hom kev siv hluav taws xob thiab khoom siv hluav taws xob. Feem ntau yog tsim los ntawm silicon nitride (Si₃N₄), ua haujlwm siab ceramic nrog tshwj xeeb thermal, mechanical, thiab hluav taws xob cov yam ntxwv, cov substrates no yog ib qho tseem ceeb platform rau mounting thiab interconnecting electronics thiab integrated circuits.

Cov khoom ntawm Silicon Nitride Ceramic Substrate

Thermal conductivity

Silicon nitride ceramic substrates muaj npe nrov rau lawv cov thermal conductivity zoo kawg li, uas ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj cua sov zoo. Cov cuab yeej no tshwj xeeb tshaj yog muaj txiaj ntsig zoo hauv cov ntawv thov uas xav tau kev tswj xyuas qhov kub thiab txias, suav nrog cov khoom siv hluav taws xob siab hluav taws xob thiab hluav taws xob hluav taws xob.

Mechanical Strength

Silicon nitride nthuav tawm cov khoom siv dag zog zoo thiab muaj zog. Nws tsis tshua muaj coefficient ntawm thermal expansion tso cai rau nws kom muaj kev ntseeg ruaj khov nyob rau hauv ib tug dav kub ntau yam.

Hluav taws xob rwb thaiv tsev

Ib qho ntawm nws cov cwj pwm tseem ceeb yog nws lub peev xwm hluav taws xob zoo insulating, ua rau nws tseem ceeb hauv cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob uas xav tau hluav taws xob cais tawm.

Tshuaj tiv thaiv

Silicon nitride yog cov tshuaj tiv thaiv zoo heev rau cov tshuaj corrosion, ua rau nws yog ib qho kev xaiv txhim khu kev qha nyob rau hauv ib puag ncig uas raug rau cov tshuaj lom neeg muaj kev txhawj xeeb.

Dielectric Properties

Silicon nitride qhov zoo dielectric zog ua rau nws invaluable nyob rau hauv microelectronics. Nws yog dav siv nyob rau hauv zus tau tej cov circuits integrated thiab nyias-zaj duab xis li qhov twg hluav taws xob rwb thaiv tsev yog ib qho tseem ceeb heev.

Cov ntaub ntawv ntaub ntawv

Kev siv ntawm Silicon Nitride Ceramic Substrates

Integrated Circuits (ICs)

Silicon nitride substrates yog cov khoom siv hauv paus rau kev tsim cov khoom sib xyaw ua ke, tshwj xeeb tshaj yog nyob rau hauv high-frequency thiab high-power applications.

Fais fab Electronics

Lawv yog ib qho tseem ceeb hauv cov khoom siv hluav taws xob xws li insulated gate bipolar transistors (IGBTs) thiab high-power diodes los txhim kho thermal tswj thiab hluav taws xob rwb thaiv tsev.

Microwave thiab RF Cheebtsam

Silicon nitride substrates yog qhov tseem ceeb hauv kev txhim kho microwave thiab xov tooj cua zaus (RF) Cheebtsam, suav nrog cov ntxaij lim dej, resonators, thiab cov kav hlau txais xov.

MEMS (Micro-Electro-Mechanical Systems)

MEMS cov cuab yeej nquag siv silicon nitride substrates vim lawv sib raug zoo nrog cov txheej txheem microfabrication thiab cov khoom siv zoo heev.

Aerospace thiab Automotive

Silicon nitride ceramic Cheebtsam yog siv nyob rau hauv high-temperature thiab high-stress ib puag ncig nyob rau hauv aerospace thiab automotive daim ntaub ntawv, xws li turbochargers thiab pa system.

Metallization rau Silicon Nitride Ceramic Substrates

1. Kev tu thiab kev npaj

Ua ntej metallization, silicon nitride ceramic substrate tau ua tiav cov txheej txheem ntxuav kom tshem tawm cov kab mob thiab xyuas kom zoo adhesion ntawm txheej hlau. Qhov no feem ntau suav nrog kev ntxuav nrog cov kuab tshuaj, kev tu ultrasonic, thiab kev kho ntshav plasma.

2. Adhesion Txheej

Txhawm rau txhim kho adhesion ntawm silicon nitride substrate thiab txheej hlau, ib txheej nyias nyias yog feem ntau tso. Cov txheej txheem adhesion feem ntau suav nrog titanium (Ti) lossis titanium tungsten (TiW). Cov txheej txheem no yog siv cov txheej txheem xws li sputtering lossis tshuaj vapor deposition (CVD).

3. Metallization Txheej

Thawj txheej hlau yog ces tso rau saum txheej adhesion. Cov hlau uas siv rau metallization muaj xws li txhuas (Al), tooj liab (Cu), kub (Au), thiab nyiaj (Ag). Kev xaiv ntawm cov hlau yog nyob ntawm daim ntawv thov tshwj xeeb thiab cov khoom siv hluav taws xob conductivity. Cov txuj ci zoo li sputtering, evaporation, electroplating, los yog tshuaj vapor deposition (CVD) yog ua hauj lwm los tso cov hlau txheej.

4. Patterning thiab Etching

Tom qab cov hlau tso tawm, cov txheej txheem photolithography yog siv los txheeb xyuas cov qauv tshwj xeeb lossis cov cim ntawm cov txheej hlau. Lub photoresist yog siv, raug UV teeb los ntawm lub npog ntsej muag, thiab tom qab ntawd tsim los tsim cov qauv. Cov tshuaj etching los yog plasma etching yog siv los tshem tawm cov hlau tsis xav tau, tawm hauv qab txoj kev xav tau.

5. Passivation Txheej

Txhawm rau tiv thaiv qhov chaw metallized los ntawm ib puag ncig yam, txheej txheej passivation feem ntau siv. Cov txheej no pab tiv thaiv oxidation thiab corrosion ntawm cov kab hlau. Silicon dioxide (SiO₂) los yog silicon nitride (Si₃N₄) feem ntau yog siv cov ntaub ntawv rau passivation txheej.

6. Ntxoov ntxoo

Qee zaum, cov txheej txheem annealing tuaj yeem ua tau los txhim kho qhov adhesion thiab conductivity ntawm txheej hlau. Annealing muaj cua sov lub substrate mus rau ib tug tshwj xeeb kub nyob rau hauv ib tug tswj cua.

7. Kev Tswj Xyuas Zoo

Cov txheej txheem metallization raug saib xyuas kom ntseeg tau tias cov tuab, adhesion, thiab cov khoom siv hluav taws xob ntawm cov txheej hlau ua tau raws li qhov xav tau tshwj xeeb. Ntau yam kev sim, xws li cov ntawv ntsuas kev tiv thaiv thiab kev tsom xam, yog siv rau kev tswj kom zoo.

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