Silicon carbide (SiC), semuchina we semiconductor wechizvarwa chechitatu, iri kuwana kutariswa kukuru nekuda kwehunhu hwayo hwepamusoro uye mashandisirwo ayo anovimbisa mumagetsi ane simba guru. Kusiyana nema semiconductors echinyakare esilicon (Si) kana germanium (Ge), SiC ine bandgap yakakura, conductivity yakanyanya yekupisa, nzvimbo yakanyanya kuputsika, uye kugadzikana kwakanaka kwemakemikari. Hunhu uhu hunoita kuti SiC ive chinhu chakanakira zvishandiso zvemagetsi mumotokari dzemagetsi, masisitimu esimba rinogona kudzorerwa, kutaurirana kwe5G, uye mamwe mashandisirwo anoshanda zvakanyanya uye akavimbika. Zvisinei, pasinei nekugona kwayo, indasitiri yeSiC inotarisana nematambudziko makuru ehunyanzvi ayo anoumba zvipingamupinyi zvikuru pakushandiswa kwakapararira.
1. SiC SubstrateKukura kweKristaro uye Kugadzira Wafer
Kugadzirwa kweSiC substrates ndiyo hwaro hweindasitiri yeSiC uye inomiririra chipingamupinyi chikuru chehunyanzvi. SiC haigone kurimwa kubva muchikamu chemvura senge silicon nekuda kwekunyunguduka kwayo kwakanyanya uye makemikari akaomarara ekristaro. Pane kudaro, nzira huru ndeyekufambisa vapor physical (PVT), iyo inosanganisira kuisa sublimation yesilicon necarbon powders patembiricha dzinopfuura 2000°C munzvimbo inodzorwa. Maitiro ekukura anoda kudzora kwakaringana pamusoro petembiricha, kumanikidzwa kwegasi, uye mafambiro ekuyerera kuti igadzire makristaro emhando yepamusoro.
SiC ine mhando dzemhando ...
Mushure mekukura kwekristaro, maitiro ekucheka, kukuya, kupukuta, uye kuchenesa anonetsa zvikuru nekuda kwekuoma kweSiC, iri yechipiri mushure medhaimani. Matanho aya anofanira kuchengetedza kusimba kwepamusoro uku achidzivirira kutsemuka, kupwanyika kwemucheto, uye kukuvara kwepasi pevhu. Sezvo dhayamita yewafer ichiwedzera kubva pamasendimita mana kusvika pamasendimita matanhatu kana masere, kudzora kushushikana kwekupisa uye kuwana kukura kusina kukanganisa kunowedzera kuoma.
2. SiC Epitaxy: Kuenzana kweLayer uye Kudzora Doping
Kukura kweSiC layers pa substrates kwakakosha nekuti mashandiro emagetsi emuchina wacho anoenderana zvakananga nemhando yelayers idzi. Chemical vapor deposition (CVD) ndiyo nzira inonyanya kushandiswa, ichibvumira kutonga kwakanyatsojeka pamusoro pemhando yedoping (n-type kana p-type) uye ukobvu hwelayers. Sezvo voltage ratings ichiwedzera, ukobvu hwe epitaxial layer hunodiwa hunogona kukwira kubva pama micrometer mashoma kusvika kumakumi kana kunyange mazana ema micrometers. Kuchengetedza ukobvu hwakaenzana, resistivity inogara iripo, uye defect density yakaderera muma layers makobvu kwakaoma zvikuru.
Midziyo yeEpitaxy uye maitiro ayo parizvino ari kutungamirwa nevashambadziri vashoma vepasi rose, zvichigadzira zvipingamupinyi zvakanyanya kune vagadziri vatsva. Kunyangwe paine substrates dzemhando yepamusoro, kudzora kwakashata kwe epitaxial kunogona kukonzera goho shoma, kuvimbika kushoma, uye kushanda kwemuchina kushoma.
3. Kugadzira Zvishandiso: Maitiro Akarurama uye Kuenderana Kwezvinhu
Kugadzirwa kwemidziyo yeSiC kunounza mamwe matambudziko. Nzira dzechinyakare dzekupararira kwesilicon hadzishande nekuda kwekunyunguduka kwakanyanya kweSiC; panzvimbo pezvo kunoshandiswa kuisa maion. Kuisa madonhwe emvura mumhepo kunodiwa kuti zvinhu zvishande, izvo zvinogona kukonzera kukuvara kwekristaro kana kuora kwenzvimbo.
Kuumbwa kwesimbi dzemhando yepamusoro chimwe chinhu chakaoma zvikuru. Kusagona kugadzikana zvakanyanya (<10⁻⁵ Ω·cm²) kwakakosha pakushanda zvakanaka kwemidziyo yemagetsi, asi simbi dzakajairika dzakadai seNi kana Al dzine kugadzikana kushoma kwekupisa. Zvirongwa zvesimbi zvakasanganiswa zvinovandudza kugadzikana asi zvinowedzera kusagona kugadzikana, zvichiita kuti kugadzirisa kuve kwakaoma zvikuru.
MaSiC MOSFET anewo matambudziko einterface; SiC/SiO₂ interface inowanzova ne density yakakura ye traps, ichideredza kufamba kwe channel uye threshold voltage stability. Kumhanya nekukurumidza kwe switching kunowedzera matambudziko e parasitic capacitance uye inductance, zvichida kugadzirwa kwakanyatsonaka kwema gate drive circuits uye packaging solutions.
4. Kubatanidza Kurongedza uye Sisitimu
Zvishandiso zveSiC zvinoshanda pamagetsi netembiricha yakakwira kupfuura silicon, zvichikonzera kuti pave nemazano matsva ekurongedza. Mamodules emagetsi akajairika haana kukwana nekuda kwekusashanda zvakanaka kwekupisa nemagetsi. Nzira dzepamusoro dzekurongedza, dzakadai se wireless interconnects, double-sided cooling, uye kubatanidzwa kwema connector capacitors, sensors, uye drive circuitry, zvinodiwa kuti SiC ishandise zvizere kugona kwayo. Zvishandiso zveSiC zvemhando yeTrench zvine mayuniti akawanda ari kuva chinhu chikuru nekuda kwekusakwanisa kwayo kupinza mhepo zvakanyanya, kudzikira kwesimba reparasitic, uye kuvandudzwa kwekushanda kweswitching.
5. Maumbirwo Emari Uye Zvazvinoreva Muindasitiri
Mutengo wepamusoro wemidziyo yeSiC unonyanya kukonzerwa nekugadzirwa kwezvinhu zve substrate ne epitaxial, izvo pamwe chete zvinosvika 70% yemari yese yekugadzira. Pasinei nemitengo yakakwira, michina yeSiC inopa zvakanakira mashandiro ayo kupfuura silicon, kunyanya mumasisitimu anoshanda zvakanyanya. Sezvo huwandu hwekugadzirwa kwe substrate nemidziyo uye goho zvichivandudzika, mutengo unotarisirwa kudzikira, zvichiita kuti michina yeSiC ive nemakwikwi mumotokari, simba rinogona kudzokororwa, uye mashandisirwo emaindasitiri.
Mhedziso
Indasitiri yeSiC inomiririra kukwira kukuru kwetekinoroji muzvinhu zve semiconductor, asi kushandiswa kwayo kunodziviswa nekukura kwakaoma kwekristaro, kudzora epitaxial layer, kugadzirwa kwemidziyo, uye matambudziko ekurongedza. Kukunda zvipingamupinyi izvi kunoda kudzora tembiricha chaiyo, kugadzirisa zvinhu zvepamusoro, maumbirwo matsva emidziyo, uye mhinduro itsva dzekurongedza. Kubudirira kunoramba kuripo munzvimbo idzi hakungoderedzi mari chete uye kuvandudza goho asiwo kuvhura mukana wese weSiC mumagetsi emagetsi echizvarwa chinotevera, mota dzemagetsi, masisitimu esimba rinogona kudzokororwa, uye mashandisirwo ekukurukurirana ane frequency yakakwira.
Remangwana reindasitiri yeSiC riri mukubatanidzwa kwekuvandudzwa kwezvinhu, kugadzira zvinhu nemazvo, uye dhizaini yemidziyo, zvichitungamira shanduko kubva kumhinduro dzakavakirwa pasilicon kuenda kuma semiconductors anoshanda zvakanyanya uye akavimbika zvikuru.
Nguva yekutumira: Zvita-10-2025