Kaarboohaydraytka Silicon (SiC) ma aha oo kaliya semiconductor gaar ah. Sifooyinkeeda korantada iyo kulaylka ee gaarka ah ayaa ka dhigaya mid aan lagama maarmaan u ah elektarooniga korontada ee jiilka soo socda, inverters-ka EV, aaladaha RF, iyo codsiyada soo noqnoqda sare. Noocyada SiC ee kala duwan,4H-SiCiyo6H-SiCsuuqa ka taliya—laakiin doorashada midda saxda ah waxay u baahan tahay wax ka badan “taas oo ka jaban.”
Maqaalkani wuxuu bixinayaa isbarbardhig dhinacyo badan leh4H-SiCiyo substrates 6H-SiC ah, oo daboolaya qaab-dhismeedka kiristaalka, sifooyinka korontada, kulaylka, farsamada, iyo codsiyada caadiga ah.
1. Qaab-dhismeedka Crystal iyo Taxanaha Is-dulsaarista
SiC waa walax polymorphic ah, taasoo la macno ah inay ku jiri karto qaab-dhismeedyo badan oo kiristaal ah oo loo yaqaan polytypes. Taxanaha is dulsaarka ee laba-lakabyada Si-C ee ku teedsan dhidibka c-ga ayaa qeexaya noocyadan polytypes:
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4H-SiC: Taxanaha afar lakabka ah ee is dulsaarka → Isku dheelitirnaan sare oo ku teedsan dhidibka c.
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6H-SiC: Taxanaha lix lakabka ah ee is dulsaarka → Isku dheelitirnaan yar, qaab-dhismeed kooxeed oo kala duwan.
Farqigani wuxuu saameeyaa dhaqdhaqaaqa side-sideyaasha, bandgap-ka, iyo dhaqanka kulaylka.
| Muuqaalka | 4H-SiC | 6H-SiC | Qoraallo |
|---|---|---|---|
| Kala-soocidda lakabka | ABCB | ABCACB | Go'aamisa qaab-dhismeedka kooxda iyo dhaqdhaqaaqa side-ka |
| Isku-dheelitirnaanta kiristaalka | Lix-geesood (midab badan) | Lix-geesood ah (wax yar ayaa dheeraatay) | Waxay saamaysaa xoqidda, koritaanka epitaxial-ka |
| Cabbirrada caadiga ah ee bufeerka | 2–8 inji | 2–8 inji | Helitaanka ayaa sii kordhaya 4H, bislaaday 6H |
2. Sifooyinka Korontada
Farqiga ugu muhiimsan wuxuu ku jiraa waxqabadka korantada. Qalabka korontada iyo kuwa soo noqnoqda sare leh,dhaqdhaqaaqa elektarooniga, farqiga bandgap, iyo iska caabintawaa arrimo muhiim ah.
| Hantida | 4H-SiC | 6H-SiC | Saamaynta Aaladda |
|---|---|---|---|
| Bandgap | 3.26 eV | 3.02 eV | Farqiga ballaaran ee 4H-SiC wuxuu u oggolaanayaa danab burbur sare, iyo hadda daadashada oo hooseysa |
| Dhaqdhaqaaqa elektarooniga ah | ~1000 cm²/V ·s | ~450 cm²/V ·s | Beddel degdeg ah oo loogu talagalay aaladaha danab sare leh ee 4H-SiC |
| Dhaqdhaqaaqa godka | ~80 cm²/V ·s | ~90 cm²/V ·s | Aaladaha korontada badankood aad bay uga muhiimsan yihiin |
| Iska caabin | 10³–10⁶ Ω·cm (dahaarka badh-daboolaya) | 10³–10⁶ Ω·cm (dahaarka badh-daboolaya) | Muhiim u ah RF iyo isku-dhafka koritaanka epitaxial |
| Joogtada Dielectric | ~10 | ~9.7 | Waxoogaa ka sarreeya 4H-SiC, waxay saameysaa awoodda qalabka |
Qodobbada Muhiimka ah:MOSFET-yada awoodda leh, diode-yada Schottky, iyo beddelka xawaaraha sare leh, 4H-SiC ayaa la doorbidaa. 6H-SiC ayaa ku filan aaladaha awoodda yar ama RF.
3. Sifooyinka Kulaylka
Kala-baxa kulaylka ayaa muhiim u ah aaladaha awoodda sare leh. 4H-SiC guud ahaan si fiican ayuu u shaqeeyaa sababtoo ah kulka uu isticmaalo.
| Hantida | 4H-SiC | 6H-SiC | Saamaynta |
|---|---|---|---|
| Gudbinta kulaylka | ~3.7 W/cm·K | ~3.0 W/cm·K | 4H-SiC si dhakhso ah ayuu kulaylka u kala firdhiyaa, taasoo yaraynaysa cadaadiska kulaylka. |
| Isugeynta ballaarinta kulaylka (CTE) | 4.2 × 10⁻⁶ /K | 4.1 × 10⁻⁶ /K | Iswaafajinta lakabka epitaxial waa muhiim si looga hortago qallooca wafer-ka |
| Heerkulka ugu badan ee hawlgalka | 600–650 °C | 600 °C | Labada sare, 4H wax yar ayay ka fiican yihiin hawlgalka korontada sare ee dheer |
4. Sifooyinka Farsamada
Xasiloonida farsamadu waxay saamaysaa maaraynta wafer-ka, jarista, iyo isku halaynta muddada dheer.
| Hantida | 4H-SiC | 6H-SiC | Qoraallo |
|---|---|---|---|
| Adkaanta (Mohs) | 9 | 9 | Labaduba aad bay u adag yihiin, marka laga reebo dheemanka oo keliya |
| Adkaanta jabka | ~2.5–3 MPa·m½ | ~ 2.5 MPa·m½ | La mid ah, laakiin 4H ayaa ka yara siman |
| Dhumucda Wafer-ka | 300–800 µm | 300–800 µm | Waferada khafiifka ah waxay yareeyaan iska caabbinta kulaylka laakiin waxay kordhiyaan khatarta maaraynta |
5. Codsiyada Caadiga ah
Fahmidda meesha polytype kasta uu ka sarreeyo waxay ka caawisaa xulashada substrate-ka.
| Qaybta Codsiga | 4H-SiC | 6H-SiC |
|---|---|---|
| MOSFET-yada danab sare leh | ✔ | ✖ |
| diode-yada Schottky | ✔ | ✖ |
| Gawaarida korontada ku shaqeeya | ✔ | ✖ |
| Qalabka RF / microwave-ka | ✖ | ✔ |
| Nalalka LED-ka iyo optoelectronics-ka | ✖ | ✔ |
| Elektaroonikada danab sare leh ee awoodda yar | ✖ | ✔ |
Xeerka Suulka:
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4H-SiC= Awood, xawaare, hufnaan
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6H-SiC= RF, silsilad sahay oo awood yar leh, oo qaangaar ah
6. Helitaanka iyo Qiimaha
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4H-SiC: Taariikh ahaan way adag tahay in la koro, haddana si isa soo taraysa ayaa loo heli karaa. Kharash yar ayaa ka sarreeya laakiin waa la caddeeyay codsiyada waxqabadka sare leh.
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6H-SiCSahayda bisil, guud ahaan kharash yar, si ballaaran loogu isticmaalo RF iyo elektarooniga awoodda yar.
Doorashada Substrate-ka Saxda ah
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Elektroonikada korontada ee xawaaraha sare leh iyo tan danab sare leh:4H-SiC waa lama huraan.
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Qalabka RF ama LED-yada:6H-SiC ayaa inta badan ku filan.
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Codsiyada xasaasiga ah ee kulaylka:4H-SiC waxay bixisaa kala-baxa kulaylka oo wanaagsan.
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Tixgelinta Miisaaniyadda ama saadka:6H-SiC waxay yareyn kartaa kharashka iyada oo aan wax u dhimayn shuruudaha qalabka.
Fikradaha kama dambaysta ah
In kasta oo 4H-SiC iyo 6H-SiC ay u ekaan karaan isha aan la tababarin, haddana kala duwanaanshahooda waxay ku kala duwan yihiin qaab-dhismeedka kiristaalka, dhaqdhaqaaqa elektarooniga, hab-dhaqanka kulaylka, iyo ku habboonaanta codsiga. Doorashada nooca polytype-ka saxda ah bilowga mashruucaaga waxay hubineysaa waxqabadka ugu wanaagsan, dib-u-hagaajinta oo yaraatay, iyo aaladaha lagu kalsoonaan karo.
Waqtiga boostada: Jan-04-2026