ʻO ke kolu o ka hanauna semiconductor surface -SiC (silicon carbide) nā mea hana a me kā lākou mau noi

Ma ke ʻano he ʻano mea semiconductor hou, ua lilo ʻo SiC i mea semiconductor koʻikoʻi loa no ka hana ʻana i nā mea optoelectronic pōkole-lōʻihi, nā mea wela kiʻekiʻe, nā hāmeʻa pale radiation a me nā mana uila kiʻekiʻe / mana kiʻekiʻe ma muli o kāna mau waiwai kino a me kemika. waiwai uila. ʻOi loa i ka wā i hoʻohana ʻia ma lalo o nā kūlana koʻikoʻi a paʻakikī, ʻoi aku ka nui o nā hiʻohiʻona o nā polokalamu SiC ma mua o nā mea Si a me nā polokalamu GaAs. No laila, ua lilo nā mea SiC a me nā ʻano mea ʻike like ʻole i hoʻokahi o nā mea koʻikoʻi, e pāʻani ana i kahi kuleana nui aʻe.

Ua ulu wikiwiki nā mea SiC a me nā kaʻapuni mai ka makahiki 1980, ʻoi aku hoʻi mai ka makahiki 1989 i ka wā i komo ai ka wafer substrate SiC mua i ka mākeke. Ma kekahi mau kahua, e like me nā kukui-emitting diodes, kiʻekiʻe-frequency kiʻekiʻe-mana a me ka kiʻekiʻe-voltage, ua hoʻohana nui ʻia nā mea SiC ma ke kālepa. He wikiwiki ka hoʻomohala ʻana. Ma hope o 10 mau makahiki o ka hoʻomohala ʻana, ua hiki i ke kaʻina hana ʻo SiC ke hana i nā mea ʻoihana. Ua hoʻomaka kekahi mau hui i hōʻike ʻia e Cree e hāʻawi i nā huahana pāʻoihana o nā polokalamu SiC. Ua hoʻokō maikaʻi ʻia nā ʻoihana noiʻi kūloko a me nā kulanui i ka ulu ʻana o ka waiwai SiC a me ka ʻenehana hana ʻenehana. ʻOiai ʻoi aku ka maikaʻi o ka waiwai SiC a me nā waiwai kemika, a ʻoi aku ka ʻoihana ʻenehana SiC, akā ʻaʻole ʻoi aku ka maikaʻi o ka hana ʻana o nā polokalamu SiC a me nā kaʻa. Ma waho aʻe o ka mea SiC a me ke kaʻina hana pono e hoʻomaikaʻi mau ʻia. Pono e hoʻoikaika hou i ka hoʻohana ʻana i nā mea SiC ma o ka hoʻonui ʻana i ka ʻōnaehana S5C a i ʻole ke noi ʻana i ke ʻano hana hou.

I kēia manawa. ʻO ka noiʻi ʻana o nā polokalamu SiC e kālele nui ana i nā polokalamu discrete. No kēlā me kēia ʻano o ka ʻōnaehana hāmeʻa, ʻo ka noiʻi mua ʻana e hoʻololi wale i ka ʻōnaehana hāmeʻa Si a i ʻole GaAs e pili ana iā SiC me ka ʻole o ka hoʻonohonoho ʻana i ka ʻōnaehana. No ka mea, ua like ka papa oxide intrinsic o SiC me Si, ʻo ia ʻo SiO2, ʻo ia hoʻi, hiki ke hana ʻia ka hapa nui o nā mea Si, ʻoi aku ka nui o nā mea m-pa, ma SiC. ʻOiai he mea hoʻololi maʻalahi wale nō, ua loaʻa i kekahi o nā mea hana i loaʻa i nā hopena maikaʻi, a ua komo kekahi o nā mea hana i ka mākeke hale hana.

ʻO nā mea ʻenehana optoelectronic SiC, ʻoi aku ka polū kukui emitting diodes (BLU-ray leds), ua komo i ka mākeke i ka makahiki 1990 a ʻo ia nā mea hana nui SiC mua. Loaʻa ʻia nā diodes SiC Schottky kiʻekiʻe, nā transistors mana SiC RF, SiC MOSFET a me nā mesFET. ʻOiaʻiʻo, ʻoi aku ka mamao o ka hana ʻana o kēia mau huahana SiC mai ka pāʻani ʻana i nā hiʻohiʻona nui o nā mea SiC, a ʻo ka ʻoi aku ka ikaika o ka hana a me ka hana ʻana o nā polokalamu SiC pono e noiʻi a hoʻomohala ʻia. ʻAʻole hiki i kēlā mau transplants maʻalahi ke hoʻohana pono i nā pono o nā mea SiC. ʻOiai ma kahi o kekahi mau pono o nā polokalamu SiC. ʻAʻole hiki ke hoʻohālikelike ʻia kekahi o nā mea SiC i hana mua ʻia me ka hana ʻana o nā hāmeʻa Si a i ʻole CaAs.

I mea e hoʻololi maikaʻi ai i nā pono o nā hiʻohiʻona SiC i nā pono o nā polokalamu SiC, ke aʻo nei mākou i kēia manawa pehea e hoʻomaikaʻi ai i ke kaʻina hana hana a me ka hoʻolālā ʻana a i ʻole ke kūkulu ʻana i nā hale hou a me nā kaʻina hana hou e hoʻomaikaʻi ai i ka hana a me ka hana ʻana o nā polokalamu SiC.