Ko te Silicon carbide (SiC), he rauemi semiconductor o te whakatupuranga tuatoru, kei te aro nuihia nā ōna āhuatanga ā-tinana pai me ōna tono whai hua i roto i ngā hikohiko mana-teitei. Kāore i rite ki ngā semiconductor silicon (Si) me te germanium (Ge) tuku iho, he whānui te āputa roopu o te SiC, he nui te kawe wera, he nui te mara pakaru, ā, he tino pumau te matū. Nā ēnei āhuatanga ka waiho te SiC hei rauemi pai mō ngā taputapu hiko i roto i ngā waka hiko, ngā pūnaha pūngao whakahou, ngā whakawhitiwhiti kōrero 5G, me ētahi atu tono tino whai hua, tino pono. Heoi, ahakoa tōna pūmanawa, kei te anga whakamua te umanga SiC i ngā wero hangarau nui e ārai ana i te whakamahinga whānui.
1. Papa SiCTe Tipu Tioata me te Hanganga Wafer
Ko te hanga o ngā papa SiC te tūāpapa o te umanga SiC, ā, koinei te arai hangarau teitei rawa atu. Kāore e taea te whakatipu i te SiC mai i te wāhanga wai pērā i te silicon nā te mea he teitei te ira rewa me te matū tioata uaua. Engari, ko te tikanga matua ko te kawe kohu ā-tinana (PVT), arā, ko te whakatōtō i ngā paura silicon me te waro parakore teitei i ngā pāmahana neke atu i te 2000°C i roto i te taiao whakahaeretia. Ko te tukanga whakatipu me whakahaere tika i ngā pikinga pāmahana, te pēhanga hau, me ngā nekehanga rere hei whakaputa i ngā tioata takitahi kounga teitei.
Neke atu i te 200 ngā momo-maha o te SiC, engari he torutoru noa iho e tika ana mō ngā tono haurua-ira. He mea nui te whakarite i te momo-maha tika me te whakaiti i ngā hapa pēnei i ngā paipa iti me ngā nekehanga miro, nā te mea he nui te pānga o ēnei hapa ki te pono o te taputapu. Ko te tere tipu puhoi, he iti iho i te 2 mm ia hāora, ka hua ake he wā tipu tioata tae atu ki te wiki mō te kotahi boule, ki te whakaritea ki ngā rā torutoru noa iho mō ngā tioata silicon.
I muri i te tipu o te tioata, he tino uaua ngā tukanga o te tapatapahi, te huri, te whakakanapa, me te horoi nā te pakeke o te SiC, tuarua i te taimana. Me tiaki e ēnei mahi te āhua o te mata me te karo i ngā kapiti moroiti, te pakaru o te taha, me te kino o raro i te mata. I te pikinga ake o te diameter o te wafer mai i te 4 inihi ki te 6, tae atu ki te 8 inihi, ka uaua haere te whakahaere i te ahotea wera me te whakatutuki i te whānui kore-hapa.
2. SiC Epitaxy: Te ōritetanga o te paparanga me te whakahaere i te doping
He mea nui te tipu epitaxial o ngā paparanga SiC i runga i ngā paparanga nā te mea ko te mahi hiko o te taputapu e whakawhirinaki tika ana ki te kounga o ēnei paparanga. Ko te tikanga matua ko te whakatakoto kohu matū (CVD), e taea ai te whakahaere tika i te momo tāpiringa (momo-n, momo-p rānei) me te matotoru o te paparanga. I te pikinga ake o ngā whakatauranga ngaohiko, ka taea te piki ake te matotoru o te paparanga epitaxial e hiahiatia ana mai i te torutoru maikoromita ki te tekau, ki te rau maikoromita rānei. He tino uaua te pupuri i te matotoru ōrite, te ātete ōrite, me te iti o te kiato hapa puta noa i ngā paparanga matotoru.
Ko ngā taputapu me ngā tukanga epitaxy kei te whakahaerehia e ētahi kaiwhakarato o te ao i tēnei wā, ā, he nui ngā arai mō ngā kaihanga hou ki te tomo. Ahakoa he kounga teitei ngā papa, ka taea e te whakahaere epitaxial ngoikore te arahi ki te iti o te hua, te iti o te pono, me te kore e tino pai te mahi a te taputapu.
3. Te Hanga Pūrere: Ngā Tukanga Tika me te Hototahi Rauemi
He wero anō kei te hangaia he taputapu SiC. Kāore e whai hua ngā tikanga tuku iho mō te horapa o te silicon nā te teitei o te ira rewa o te SiC; ka whakamahia te whakaurunga katote hei whakakapi. Me whakamahana i te pāmahana teitei hei whakahohe i ngā tāpiringa, ka tūpono te kino o te whatunga tioata, te pirau rānei o te mata.
Ko tētahi atu uauatanga nui ko te hanganga o ngā hononga whakarewa kounga teitei. He mea nui te ātete pa iti (<10⁻⁵ Ω·cm²) mō te whai huatanga o te taputapu hiko, engari he iti te pumau o te wera o ngā konganuku noa pēnei i te Ni, te Al rānei. Ka whakapai ake ngā kaupapa whakarewa hiato i te pumau engari ka whakanui ake i te ātete pa, ka tino uaua te arotau.
Ka pāngia hoki ngā MOSFET SiC e ngā raruraru atanga; he maha ngā wā he nui ngā mahanga o te atanga SiC/SiO₂, e whakawhāiti ana i te nekenekehanga o te hongere me te pumau o te ngaohiko paepae. Ko ngā tere whakawhiti tere ka whakanui ake i ngā raruraru me te kaha pirinoa me te inductance, e hiahia ana kia āta hoahoahia ngā ara iahiko taraiwa kuaha me ngā otinga tākai.
4. Te Tākai me te Whakaurunga Pūnaha
He nui ake ngā ngaohiko me ngā pāmahana e whakahaerehia ana e ngā taputapu hiko SiC i ngā hoa hiko silicon, ā, e hiahiatia ana he rautaki tākai hou. Kāore e ranea ngā waeine here-waea tuku iho nā te mea he iti ake ngā herenga mahi wera me te hiko. Me whakamahi i ngā huarahi tākai matatau, pērā i ngā hononga ahokore, te whakamatao taha-rua, me te whakaurunga o ngā pūnga wetewete, ngā pūoko, me ngā ara iahiko taraiwa, hei whakamahi katoa i ngā āheinga o te SiC. Kei te rongonui haere ngā taputapu SiC momo-awaawa me te kiato waeine teitei ake nā te mea he iti ake te ātete kawe hiko, he iti ake te kaha pirinoa, me te pai ake o te pai o te whakawhiti.
5. Hanganga Utu me ngā Pānga ki te Ahumahi
Ko te utu nui o ngā taputapu SiC nā te hanga rauemi papa me te epitaxial, e 70% pea o ngā utu hanga katoa. Ahakoa te nui o ngā utu, he pai ake te mahi a ngā taputapu SiC i te silicon, inā koa i roto i ngā pūnaha tino whai hua. I te mea ka piki haere te hanga papa me te taputapu me te whakapai ake i ngā hua, e matapaetia ana ka heke te utu, ka kaha ake te whakataetae o ngā taputapu SiC i roto i ngā tono motuka, pūngao whakahou, me ngā tono ahumahi.
Whakamutunga
Ko te umanga SiC he peke hangarau nui i roto i ngā rauemi semiconductor, engari ko tōna whakamahinga he mea herea e te tipu tioata matatini, te whakahaere paparanga epitaxial, te hanga taputapu, me ngā wero takai. Ko te wikitoria i ēnei arai me whakahaere tika te pāmahana, te tukatuka rauemi matatau, ngā hanganga taputapu auaha, me ngā otinga takai hou. Ko ngā whanaketanga tonu i roto i ēnei wāhanga ehara i te mea ka whakaiti noa i ngā utu me te whakapai ake i ngā hua engari ka iriti hoki i te pūmanawa katoa o te SiC i roto i ngā hikohiko mana o te whakatupuranga e whai ake nei, ngā waka hiko, ngā pūnaha pūngao whakahou, me ngā tono whakawhitiwhiti auau-teitei.
Ko te heke mai o te umanga SiC kei roto i te whakaurunga o te auahatanga rauemi, te hanga tika, me te hoahoa taputapu, e akiaki ana i te nekehanga mai i ngā otinga e hangai ana ki te silicon ki ngā semiconductors whānui-whanui-whai hua, tino pono.
Wā tuku: Hakihea-10-2025