Ehara i te mea he haurua-ā-ira motuhake noa iho te Silicon carbide (SiC). Nā ōna āhuatanga hiko me te wera tino pai, he mea nui mō ngā hikohiko mana o te whakatupuranga e whai ake nei, ngā kaitahuri EV, ngā taputapu RF, me ngā tono auau-teitei. I roto i ngā momo SiC,4H-SiCme6H-SiCte mana nui o te mākete—engari ko te whiriwhiri i te mea tika me nui atu i te "ko tēhea te mea iti ake te utu" anake.
Ka whakaratohia e tēnei tuhinga he whakataurite maha-ahu o4H-SiCme ngā papa 6H-SiC, e kapi ana i te hanganga tioata, te hiko, te wera, ngā āhuatanga hangarau, me ngā tono noa.
1. Hanganga Karaihe me te Raupapa Whakatakotoranga
He rauemi polymorphic te SiC, arā, ka taea te noho i roto i ngā hanganga tioata maha e kiia nei ko ngā polytype. Ko te raupapa whakarārangi o ngā paparanga rua Si–C i te tuaka-c e tautuhi ana i ēnei polytype:
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4H-SiC: Raupapa tāpae paparanga-whā → Te ōritetanga teitei ake i te tuaka-c.
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6H-SiC: Raupapa tāpae paparanga-ono → He paku iti ake te ōritetanga, he rerekē te hanganga roopu.
Ka pā tēnei rerekētanga ki te nekenekehanga o ngā kaikawe, te āputa roopu, me te whanonga wera.
| Āhuatanga | 4H-SiC | 6H-SiC | Ngā Tuhipoka |
|---|---|---|---|
| Te whakarārangi paparanga | ABCB | ABCACB | Te whakatau i te hanganga o te roopu me ngā hihiri kawe |
| Te ōritetanga o te karaihe | Hexagonal (he ōrite ake) | He whā tekau (he paku roa) | Ka pā ki te whakairo, te tipu epitaxial |
| Ngā rahi wafer noa | 2–8 inihi | 2–8 inihi | Ka piki ake te wātea mō te 4H, ka pakari mō te 6H |
2. Ngā Āhuatanga Hiko
Ko te rerekētanga tino nui kei roto i te mahi hiko. Mō ngā taputapu hiko me ngā taputapu auau teitei,te nekenekehanga irahiko, te āputa roopu, me te ātetehe mea matua.
| Taonga | 4H-SiC | 6H-SiC | Pānga ki te Pūrere |
|---|---|---|---|
| Āputaputa | 3.26 eV | 3.02 eV | Mā te whānui o te āputa i roto i te 4H-SiC ka taea te whakanui ake i te ngaohiko pakaru, te iti ake o te ia turuturu |
| Te nekenekehanga o te irahiko | ~1000 cm²/V·s | ~450 cm²/V·s | Te whakawhiti tere ake mō ngā taputapu ngaohiko-tiketike i roto i te 4H-SiC |
| Te nekenekehanga o te kōhao | ~80 henimita²/V·s | ~90 henimita²/V·s | Kāore i te tino hira mō te nuinga o ngā taputapu hiko |
| Ātete | 10³–10⁶ Ω·cm (haurua-whakamātao) | 10³–10⁶ Ω·cm (haurua-whakamātao) | He mea nui mō te RF me te tipu epitaxial ōritetanga |
| Pūmau whakapūmau hiko | ~10 | ~9.7 | He paku teitei ake i roto i te 4H-SiC, ka pā ki te kaha o te taputapu |
Ngā Kōrero Matua:Mō ngā MOSFET hiko, ngā diode Schottky, me te whakawhiti tere-teitei, he pai ake te 4H-SiC. He rawaka te 6H-SiC mō ngā taputapu mana-iti, RF rānei.
3. Ngā Āhuatanga Wera
He mea nui te marara wera mō ngā taputapu mana-nui. Ko te tikanga he pai ake te mahi a te 4H-SiC nā tōna kawe wera.
| Taonga | 4H-SiC | 6H-SiC | Ngā Pānga |
|---|---|---|---|
| Te kawe wera | ~3.7 W/cm·K | ~3.0 W/cm·K | Ka tere ake te whakamarara o te wera e te 4H-SiC, ka whakaiti i te ahotea wera |
| Tauwehenga o te whakawhānui wera (CTE) | 4.2 ×10⁻⁶ /K | 4.1 ×10⁻⁶ /K | He mea nui te taurite ki ngā paparanga epitaxial hei ārai i te piko o te wafer |
| Te pāmahana mahi mōrahi | 600–650 °C | 600°C | He teitei ngā mea e rua, he pai ake te 4H mō te mahi roa-mana-nui |
4. Ngā Āhuatanga Mīhini
Ka pā te pumau ā-mīhini ki te whakahaere i te anga, te tapahi tapatapahi, me te pono mō te wā roa.
| Taonga | 4H-SiC | 6H-SiC | Ngā Tuhipoka |
|---|---|---|---|
| Te pakeketanga (Mohs) | 9 | 9 | He tino mārō ngā mea e rua, tuarua ki te taimana anake |
| Te pakari o te whati | ~2.5–3 MPa·m½ | ~2.5 MPa·m½ | He rite tonu, engari he rite ake te 4H |
| Te matotoru o te anga | 300–800 µm | 300–800 µm | Ka whakaitihia e ngā angiangi te ātete wera engari ka nui ake te mōrearea o te whakahaere |
5. Ngā Whakamahinga Noa
Mā te mārama ki te hiranga o ia momo momo ka āwhina i te whiriwhiri i te papa.
| Kāwai Taupānga | 4H-SiC | 6H-SiC |
|---|---|---|
| Ngā MOSFET ngaohiko-tiketike | ✔ | ✖ |
| Ngā diode Schottky | ✔ | ✖ |
| Ngā kaitahuri waka hiko | ✔ | ✖ |
| Ngā taputapu RF / ngaruiti | ✖ | ✔ |
| Ngā LED me ngā hikohiko opto | ✖ | ✔ |
| Ngā hikohiko ngaohiko teitei-iti-mana | ✖ | ✔ |
Ture Matua:
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4H-SiC= Mana, tere, whai huatanga
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6H-SiC= RF, iti-mana, mekameka tuku kua pakeke
6. Te Wātea me te Utu
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4H-SiCI mua he uaua ake te whakatipu, engari kei te piki haere te wātea inaianei. He paku teitei ake te utu engari he tika mō ngā tono mahi teitei.
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6H-SiCHe tuku kua pakeke, he iti ake te utu, e whakamahia whānuitia ana mō ngā hiko RF me ngā hikohiko iti-mana.
Te Kōwhiri i te Papa Tika
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Ngā hikohiko hiko tere-teitei, ngaohiko teitei:He mea nui te 4H-SiC.
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Ngā taputapu RF, ngā LED rānei:He rawaka te 6H-SiC i te nuinga o te wā.
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Ngā tono tairongo-wera:He pai ake te marara o te wera nā te 4H-SiC.
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Ngā whakaaro mō te tahua, te tuku rānei:Ka taea e te 6H-SiC te whakaiti i te utu me te kore e whakararu i ngā whakaritenga o te taputapu.
Ngā Whakaaro Whakamutunga
Ahakoa te āhua rite o te 4H-SiC me te 6H-SiC ki te kanohi kāore i te whakangungua, ko ō rāua rerekētanga e pā ana ki te hanganga tioata, te nekehanga irahiko, te kawe wera, me te pai o te tono. Mā te whiriwhiri i te momo momo tika i te tīmatanga o tō kaupapa ka tino pai te mahi, ka iti ake te mahi anō, me ngā taputapu pono.
Wā tuku: Hanuere-04-2026