Kutheni iiWafers zeSiC ezicocekileyo kakhulu zibalulekile kwi-Elektroniki zamandla zesizukulwana esilandelayo

1. Ukusuka kwiSilicon ukuya kwiSilicon Carbide: Utshintsho lweParadigm kwiPower Electronics

Kangangeminyaka engaphezu kwesiqingatha senkulungwane, i-silicon ibisoloko ingumqolo we-electronics yamandla. Nangona kunjalo, njengoko izithuthi zombane, iinkqubo zamandla ahlaziyekayo, amaziko edatha e-AI, kunye namaqonga eenqwelo-moya zityhalela phambili kwii-voltage eziphezulu, amaqondo obushushu aphezulu, kunye noxinano lwamandla aphezulu, i-silicon isondela kwimida yayo esisiseko yomzimba.

I-Silicon carbide (SiC), i-semiconductor ye-wide-bandgap ene-bandgap ye-~3.26 eV (4H-SiC), ivele njengesisombululo senqanaba lezinto kunokuba ibe yindlela yokusombulula ingxaki kwinqanaba lesekethe. Sekunjalo, inzuzo yokusebenza kwezixhobo ze-SiC ayimiselwanga kuphela zizinto ngokwazo, kodwa bubunyulu bazo.I-SiC waferapho kwakhiwe khona izixhobo.

Kwizixhobo ze-elektroniki zesizukulwana esilandelayo, ii-wafers ze-SiC ezicocekileyo kakhulu aziyonto iphambili—ziyimfuneko.

2. Oko Kuthethwa "Ubumsulwa Obuphezulu" Kwii-SiC Wafers

Kwimeko yee-wafers ze-SiC, ubunyulu budlulela ngaphaya kokwakheka kweekhemikhali. Yiparameter yezinto ezisetyenziswa ngeendlela ezininzi, kuquka:

• Uxinzelelo lwe-dopant olungenanjongo oluphantsi kakhulu

• Ukucinywa kokungcola kwesinyithi (Fe, Ni, V, Ti)

• Ulawulo lweziphene zangaphakathi zamanqaku (izithuba, izinto ezichasene neendawo)

• Ukunciphisa iziphene zekristale ezinde

Kwanokulandelela ukungcola kwinqanaba leenxalenye-ngebhiliyoni (ppb) kunokungenisa amanqanaba anzulu amandla kwi-bandgap, esebenza njengemigibe yokuthwala okanye iindlela zokuvuza. Ngokungafaniyo ne-silicon, apho ukunyamezela ukungcola kuxolela khona, i-bandgap ebanzi ye-SiC yandisa impembelelo yombane yesiphene ngasinye.

3. Ubumsulwa obuphezulu kunye neFiziksi yokusebenza kweVoltage ephezulu

Inzuzo ecacileyo yezixhobo zombane zeSiC ikukwazi kwazo ukugcina amasimi ombane agqithisileyo—ukuya kuthi ga ngokuphindwe kalishumi kunesilicon. Olu buchule luxhomekeke kakhulu ekusasazweni kwentsimi yombane efanayo, nto leyo edinga:

• Ukumelana okufanayo kakhulu

• Ubomi bomthwali obuzinzileyo nobuqikelelekayo

• Uxinano oluncinci lwe-trap olusezantsi

Ukungcola kuyayiphazamisa le bhalansi. Kuphazamisa intsimi yombane kwindawo ethile, nto leyo ekhokelela koku:

• Ukwaphuka kwangaphambi kwexesha

• Ukwanda komsinga wokuvuza

• Ukuthembeka kwe-voltage yokuvimba okuncitshisiweyo

Kwizixhobo ezine-voltage ephezulu kakhulu (≥1200 V, ≥1700 V), ukusilela kwesixhobo kudla ngokuvela kwisiphene esinye esibangelwa kukungcola, kungekhona kumgangatho oqhelekileyo wezinto ezisetyenzisiweyo.

4. Uzinzo lobushushu: Ubunyulu njengeSinki yobushushu engabonakaliyo

I-SiC yaziwa ngokuhambisa kwayo ubushushu okuphezulu kunye nokukwazi kwayo ukusebenza ngaphezulu kwama-200°C. Nangona kunjalo, ukungcola kusebenza njengeziko lokusasaza ii-phonon, kunciphisa ukuhanjiswa kobushushu kwinqanaba le-microscopic.

Iiwafer zeSiC ezicocekileyo kakhulu zivumela:

• Amaqondo obushushu aphantsi e-junction kubuninzi bamandla obufanayo

• Umngcipheko oncitshisiweyo wokubaleka kobushushu

• Ubomi besixhobo obude phantsi koxinzelelo lobushushu olujikelezayo

Ngokwendlela esebenzayo, oku kuthetha iinkqubo zokupholisa ezincinci, iimodyuli zamandla alula, kunye nokusebenza kakuhle kwinqanaba lenkqubo—iimilinganiselo eziphambili kwii-EV kunye nee-elektroniki zeenqwelo moya.

5. Ucoceko Oluphezulu kunye neMboleko yeZixhobo: Uqoqosho lweZiphene

Njengoko imveliso yeSiC isiya kwi-wafers ezi-8-intshi kwaye ekugqibeleni zibe yi-12-intshi, uxinano lweziphene lukhula ngendlela engangqalanga kunye nendawo ye-wafer. Kule nkqubo, ubunyulu buba yinto eguquguqukayo kwezoqoqosho, kungekhona nje eyobuchwephesha.

Iiwafers ezicocekileyo kakhulu zibonelela:

• Ukufana okuphezulu komaleko we-epitaxial

• Umgangatho ophuculweyo we-interface ye-MOS

• Imveliso ephezulu kakhulu yesixhobo nge-wafer nganye

Kubavelisi, oku kuthetha ngokuthe ngqo ukunciphisa iindleko nge-ampere nganye, oku kukhawulezisa ukwamkelwa kweSiC kwizicelo ezixabisa kakhulu ezifana neetshaja ezikwibhodi kunye nee-inverters zoshishino.

6. Ukuvumela i-Next Wave: Ngaphaya kwezixhobo zamandla eziqhelekileyo

Ii-wafer ze-SiC ezicocekileyo kakhulu azibalulekanga kuphela kwii-MOSFET zanamhlanje kunye nee-diode zeSchottky. Ziyindlela evumela uyilo lwexesha elizayo, kuquka:

• Iziphuli zesekethe eziqinileyo ezikhawulezayo kakhulu

• Ii-IC zamandla aphezulu kwiindawo zedatha ze-AI

• Izixhobo zamandla eziqinileyo zemisebe kwimisebenzi yasesibhakabhakeni

• Ukuhlanganiswa kwamandla kunye nemisebenzi yokuva amandla kunye ne-monolithic

Ezi zicelo zifuna ukuqikelelwa okugqithisileyo kwezinto, apho ubunyulu busisiseko apho ifiziksi yezixhobo eziphambili inokwakhiwa khona ngokuthembekileyo.

7. Isiphelo: Ubunyulu njengeSixhobo soBuchule boBugcisa

Kwizixhobo ze-elektroniki zesizukulwana esilandelayo, impumelelo yokusebenza ayisekho ngokuyintloko kuyilo lwesekethe olukrelekrele. Zivela kwinqanaba elinye elinzulu—kwisakhiwo seathomu se-wafer ngokwayo.

Ii-wafer ze-SiC ezicocekileyo kakhulu ziguqula i-silicon carbide ukusuka kwizinto ezithembisayo zibe yiplatifomu enokwandiswa, ethembekileyo, nefanelekileyo kwihlabathi elinombane. Njengoko amanqanaba ombane enyuka, ubungakanani benkqubo buyancipha, kwaye iinjongo zokusebenza ziqina, ubunyulu buba yinto ecacileyo ebangela impumelelo.

Ngale ndlela, ii-wafers ze-SiC ezicocekileyo kakhulu azizo nje izinto—ziziseko ezingundoqo zekamva le-elektroniki yamandla.