ʻO ka Electrode Sapphire Substrate a me nā Wafer C-plane LED Substrates
Nā kikoʻī
| LAULĀ | ||
| Formula Kemika | Al2O3 | |
| ʻAno Crystal | ʻŌnaehana Hexagonal (hk o 1) | |
| Ana o ke Kelepona ʻĀpana | a=4.758 Å,Å c=12.991 Å, c:a=2.730 | |
| KINO | ||
| Metrika | Pelekania (Emepaea) | |
| Ka nui o ka paʻa | 3.98 g/cc | 0.144 lb/in3 |
| Paʻakikī | 1525 - 2000 Knoop, 9 mhos | 3700° F |
| Kiko Heheʻe | 2310 K (2040° C) | |
| KŪLANA | ||
| Ikaika Hoʻopaʻa | 275 MPa a i 400 MPa | 40,000 a i 58,000 psi |
| Ikaika Tensile ma 20° C | 58,000 psi (hoʻolālā min.) | |
| Ikaika Tensile ma 500° C | 40,000 psi (hoʻolālā min.) | |
| Ikaika Tensile ma 1000° C | 355 MPa | 52,000 psi (hoʻolālā palena iki) |
| Ikaika Flexural | 480 MPa a i 895 MPa | 70,000 a i 130,000 psi |
| Ikaika Hoʻopili | 2.0 GPa (hope loa) | 300,000 psi (hope loa) |
ʻO Sapphire ma ke ʻano he substrate kaapuni semiconductor
ʻO nā wafers sapphire lahilahi ka hoʻohana mua ʻana o kahi substrate insulating kahi i waiho ʻia ai ka silicon e hana i nā kaapuni i hoʻohui ʻia i kapa ʻia ʻo silicon ma sapphire (SOS). Ma waho aʻe o kona mau waiwai insulation uila maikaʻi loa, loaʻa i ka sapphire ke conductivity thermal kiʻekiʻe. He kūpono loa nā ʻāpana CMOS ma ka sapphire no nā noi alapine lekiō kiʻekiʻe (RF) e like me nā kelepona paʻalima, nā lekiō band palekana lehulehu a me nā ʻōnaehana kamaʻilio ukali.
Hoʻohana ʻia nā wafers sapphire kristal hoʻokahi ma ke ʻano he substrates i ka ʻoihana semiconductor no ka ulu ʻana i nā mea hana gallium nitride (GaN). ʻO ka hoʻohana ʻana i ka sapphire e hōʻemi nui i nā kumukūʻai no ka mea he 1/7th ia o ke kumukūʻai o ka germanium. Hoʻohana pinepine ʻia ʻo GaN ma ka sapphire i nā diode hoʻopuka kukui polū (LED).
E hoʻohana ma ke ʻano he mea puka makani
Hoʻohana pinepine ʻia ka sapphire synthetic (i kekahi manawa i kapa ʻia ʻo ke aniani sapphire) ma ke ʻano he mea puka makani no ka mea he moakaka loa ia ma waena o 150 nm (ultraviolet) a me 5500 nm (infrared) nā nalu o ke kukui (ʻo ke ʻano o ka spectrum ʻike ʻia mai kahi o 380 nm a 750 nm) a he kiʻekiʻe loa ke kū'ē ʻana i ke kahakaha ʻana. Nā pono nui o nā puka makani sapphire
Hoʻokomo
ʻO ka bandwidth hoʻoili optical ākea loa, mai UV a i ke kukui infrared kokoke
ʻOi aku ka ikaika ma mua o nā mea optical ʻē aʻe a i ʻole nā puka makani aniani
Kūpaʻa loa i ke kahakaha ʻana a me ka abrasion (paʻakikī mineral o 9 ma ka unahi Mohs, ʻo ka lua wale nō i ka daimana a me ka moissanite i waena o nā mea kūlohelohe)
Kiko heheʻe kiʻekiʻe loa (2030°C)
Kiʻikuhi kikoʻī
