Yuav ua li cas SiC thiab GaN tab tom hloov pauv lub zog semiconductor ntim khoom

Kev lag luam semiconductor fais fab tab tom hloov pauv los ntawm kev siv cov ntaub ntawv dav dav (WBG) sai sai.Silicon Carbide(SiC) thiab Gallium Nitride (GaN) yog cov nyob rau pem hauv ntej ntawm qhov kev hloov pauv no, ua rau cov khoom siv hluav taws xob tiam tom ntej nrog kev ua haujlwm zoo dua, kev hloov pauv sai dua, thiab kev ua haujlwm thermal zoo dua. Cov ntaub ntawv no tsis yog tsuas yog txhais dua cov yam ntxwv hluav taws xob ntawm cov khoom siv hluav taws xob semiconductor xwb tab sis kuj tsim cov teeb meem tshiab thiab cov cib fim hauv kev siv tshuab ntim khoom. Kev ntim khoom zoo yog qhov tseem ceeb rau kev siv tag nrho lub peev xwm ntawm SiC thiab GaN cov khoom siv, ua kom ntseeg tau tias muaj kev ntseeg siab, kev ua tau zoo, thiab lub neej ntev hauv cov ntawv thov xws li tsheb fais fab (EVs), cov tshuab hluav taws xob rov ua dua tshiab, thiab cov khoom siv hluav taws xob hauv kev lag luam.

Cov txiaj ntsig ntawm SiC thiab GaN

Cov khoom siv fais fab silicon (Si) ib txwm muaj tau tswj hwm kev lag luam tau ntau xyoo lawm. Txawm li cas los xij, thaum qhov kev thov rau lub zog ceev dua, kev ua haujlwm zoo dua, thiab cov yam ntxwv me dua, silicon ntsib cov kev txwv tseem ceeb:

• Lub zog hluav taws xob tsawg, ua rau nws nyuaj rau kev ua haujlwm kom muaj kev nyab xeeb ntawm cov hluav taws xob siab dua.

• Kev hloov qeeb qeeb, ua rau muaj kev poob qis ntawm kev hloov pauv hauv cov ntawv thov siab.

• Kev ua kom sov qis dua, ua rau muaj cua sov sib sau ua ke thiab cov kev cai txias nruj dua.

SiC thiab GaN, ua WBG semiconductors, kov yeej cov kev txwv no:

• SiCmuaj lub zog hluav taws xob tawg siab, kev ua kom sov zoo heev (3-4 npaug ntawm silicon), thiab kev kam rau siab kub, ua rau nws zoo tagnrho rau cov ntawv thov muaj zog xws li inverters thiab traction motors.

• GaNmuab kev hloov pauv sai heev, tsis tshua muaj kev tiv thaiv, thiab muaj kev txav mus los ntawm hluav taws xob siab, ua rau cov hloov pauv hluav taws xob me me, ua haujlwm tau zoo ua haujlwm ntawm cov zaus siab.

Los ntawm kev siv cov txiaj ntsig ntawm cov khoom siv no, cov engineers tuaj yeem tsim cov tshuab fais fab nrog kev ua haujlwm zoo dua, me dua, thiab kev ntseeg tau zoo dua.

Kev cuam tshuam rau Kev Ntim Khoom Siv Hluav Taws Xob

Txawm hais tias SiC thiab GaN txhim kho kev ua haujlwm ntawm cov khoom siv ntawm theem semiconductor, cov thev naus laus zis ntim khoom yuav tsum hloov pauv los daws cov teeb meem thermal, hluav taws xob, thiab mechanical. Cov kev xav tseem ceeb suav nrog:

1. Kev Tswj Xyuas Kub
   Cov khoom siv SiC tuaj yeem ua haujlwm ntawm qhov kub tshaj 200 ° C. Kev ua kom sov zoo yog qhov tseem ceeb kom tiv thaiv kev khiav tawm ntawm thermal thiab xyuas kom muaj kev ntseeg siab mus sij hawm ntev. Cov ntaub ntawv thermal interface siab heev (TIMs), cov khoom siv tooj liab-molybdenum, thiab cov qauv tsim kom sov zoo tshaj plaws yog qhov tseem ceeb. Kev txiav txim siab txog thermal kuj cuam tshuam rau qhov chaw ntawm lub pwm, qhov chaw teeb tsa module, thiab qhov loj me ntawm pob khoom.

2. Kev Ua Haujlwm Hluav Taws Xob thiab Cov Kab Mob
   Qhov ceev hloov ntawm GaN ua rau cov kab mob pob khoom - xws li inductance thiab capacitance - tseem ceeb heev. Txawm tias cov khoom me me ntawm cov kab mob tuaj yeem ua rau muaj hluav taws xob ntau dhau, cuam tshuam hluav taws xob (EMI), thiab kev poob hloov pauv. Cov tswv yim ntim khoom xws li flip-chip bonding, luv luv tam sim no, thiab embedded die configurations tau txais kev siv ntau dua los txo cov teebmeem ntawm cov kab mob.

3. Kev Ntseeg Tau ntawm Tshuab
   SiC yog ib yam khoom uas tawg yooj yim, thiab cov khoom siv GaN-on-Si muaj kev ntxhov siab. Cov khoom ntim yuav tsum daws cov teeb meem thermal expansion mismatches, warpage, thiab mechanical qaug zog kom tswj tau qhov ruaj khov ntawm cov khoom siv hauv qab kev hloov pauv thermal thiab hluav taws xob. Cov ntaub ntawv txuas pwm uas tsis muaj kev ntxhov siab tsawg, cov khoom siv ua raws li cov qauv, thiab cov khoom siv hauv qab uas ruaj khov pab txo cov kev pheej hmoo no.

4. Kev Ua Kom Me Me Thiab Kev Koom Ua Ke
   Cov khoom siv WBG ua rau muaj zog ntau dua, uas ua rau muaj kev xav tau cov pob khoom me dua. Cov txheej txheem ntim khoom siab heev - xws li chip-on-board (CoB), dual-sided cooling, thiab system-in-package (SiP) kev koom ua ke - tso cai rau cov neeg tsim qauv kom txo qhov chaw thaum tswj kev ua tau zoo thiab kev tswj cua sov. Miniaturization kuj txhawb nqa kev ua haujlwm siab dua thiab kev teb sai dua hauv cov kab ke hluav taws xob fais fab.

Cov Kev daws teeb meem ntim khoom tshiab

Muaj ntau txoj hauv kev ntim khoom tshiab tau tshwm sim los txhawb kev siv SiC thiab GaN:

• Cov Khoom Siv Tooj Liab Txuas Ncaj Qha (DBC)rau SiC: DBC thev naus laus zis txhim kho kev sib kis cua sov thiab kev ruaj khov ntawm lub cev thaum muaj hluav taws xob ntau.

• Cov Qauv Tsim GaN-on-SiCov no txo ​​cov parasitic inductance thiab ua kom muaj kev hloov pauv sai heev hauv cov modules me me.

• Kev Ua Haujlwm Kub Siab Thermal Conductivity Encapsulation: Cov tshuaj molding siab heev thiab cov khoom ntim qis uas tiv thaiv kev tawg thiab kev tawg hauv qab kev voj voog thermal.

• 3D thiab Multi-Chip ModulesKev koom ua ke ntawm cov tsav tsheb, cov sensors, thiab cov khoom siv fais fab rau hauv ib pob khoom ua rau kev ua haujlwm ntawm lub kaw lus zoo dua thiab txo qhov chaw ntawm lub rooj tsavxwm.

Cov kev tsim kho tshiab no qhia txog lub luag haujlwm tseem ceeb ntawm kev ntim khoom hauv kev qhib lub peev xwm tag nrho ntawm WBG semiconductors.

Xaus lus

SiC thiab GaN yog qhov tseem ceeb hloov pauv thev naus laus zis semiconductor fais fab. Lawv cov khoom siv hluav taws xob thiab thermal zoo tshaj plaws ua rau cov khoom siv ua haujlwm sai dua, ua haujlwm tau zoo dua, thiab muaj peev xwm ua haujlwm hauv qhov chaw nyuaj dua. Txawm li cas los xij, kev paub txog cov txiaj ntsig no xav tau cov tswv yim ntim khoom zoo sib xws uas hais txog kev tswj hwm thermal, kev ua haujlwm hluav taws xob, kev ntseeg siab ntawm lub tshuab, thiab kev ua kom me me. Cov tuam txhab uas tsim kho tshiab hauv kev ntim khoom SiC thiab GaN yuav ua tus thawj coj ntawm tiam tom ntej ntawm cov khoom siv hluav taws xob fais fab, txhawb nqa cov txheej txheem siv hluav taws xob zoo thiab ua haujlwm tau zoo thoob plaws hauv tsheb, kev lag luam, thiab cov khoom siv hluav taws xob rov ua dua tshiab.

Hauv kev xaus lus, kev hloov pauv hauv kev ntim khoom siv hluav taws xob semiconductor yog qhov tsis sib cais los ntawm kev nce ntawm SiC thiab GaN. Raws li kev lag luam txuas ntxiv thawb mus rau kev ua haujlwm zoo dua, qhov ceev dua, thiab kev ntseeg siab dua, kev ntim khoom yuav ua lub luag haujlwm tseem ceeb hauv kev txhais cov txiaj ntsig theoretical ntawm cov semiconductors dav dav mus rau hauv cov kev daws teeb meem siv tau.