Electrode Sapphire Substrate thiab Wafer C-plane LED Substrates
Cov Lus Qhia Tshwj Xeeb
| TAG NRHO | ||
| Cov Qauv Tshuaj | Al2O3 | |
| Crystal Structure | Lub Tshuab Hexagonal (hk o 1) | |
| Qhov Loj ntawm Chav Tsev | a = 4.758 Å, Å c = 12.991 Å, c: a = 2.730 | |
| LUB NEEJ | ||
| Kev ntsuas | Lus Askiv (Imperial) | |
| Qhov Ceev | 3.98 g/cc | 0.144 phaus/in3 |
| Qhov nyuaj | 1525 - 2000 Knoop, 9 mhos | 3700° F |
| Qhov Kub Yaj | 2310 K (2040° C) | |
| COV QAUV | ||
| Lub zog tensile | 275 MPa txog 400 MPa | 40,000 txog 58,000 psi |
| Lub zog tensile ntawm 20 ° C | 58,000 psi (tsim tsawg kawg nkaus) | |
| Lub zog tensile ntawm 500 ° C | 40,000 psi (tsim tsawg kawg nkaus) | |
| Lub zog tensile ntawm 1000 ° C | 355 MPa | 52,000 psi (tsim tsawg kawg nkaus) |
| Flexural Strength | 480 MPa txog 895 MPa | 70,000 txog 130,000 psi |
| Lub zog nias | 2.0 GPa (qhov kawg) | 300,000 psi (qhov kawg) |
Sapphire ua ib lub substrate semiconductor circuit
Cov sapphire wafers nyias yog thawj zaug siv cov khoom siv rwb thaiv tsev uas silicon tau muab tso rau hauv los tsim cov circuits hu ua silicon ntawm sapphire (SOS). Ntxiv rau nws cov khoom siv rwb thaiv tsev zoo heev, sapphire muaj cov thermal conductivity siab. CMOS chips ntawm sapphire yog qhov tsim nyog rau cov ntawv thov xov tooj cua zaus siab (RF) xws li xov tooj ntawm tes, xov tooj cua kev nyab xeeb pej xeem thiab cov kab ke sib txuas lus satellite.
Cov pob zeb sapphire siv lead ua ib leeg kuj siv ua cov khoom siv hauv kev lag luam semiconductor rau kev cog cov khoom siv gallium nitride (GaN). Kev siv sapphire txo cov nqi vim nws yog li 1/7 ntawm tus nqi ntawm germanium. GaN ntawm sapphire feem ntau siv rau hauv cov teeb xiav emitting diodes (LEDs).
Siv ua cov khoom siv qhov rai
Cov pob zeb sapphire ua los ntawm cov khoom siv hluavtaws (qee zaum hu ua iav sapphire) feem ntau siv ua cov khoom siv qhov rai vim tias nws pob tshab heev ntawm 150 nm (ultraviolet) thiab 5500 nm (infrared) wavelengths ntawm lub teeb (qhov pom kev ntau ntawm li 380 nm txog 750 nm) thiab muaj kev tiv thaiv siab heev rau kev khawb. Cov txiaj ntsig tseem ceeb ntawm cov qhov rai sapphire
suav nrog
Kev xa xov hluav taws xob dav heev, los ntawm UV mus rau lub teeb ze-infrared
Muaj zog dua li lwm cov ntaub ntawv kho qhov muag lossis cov qhov rai iav
Muaj zog tiv taus khawb thiab puas (qhov nyuaj ntawm cov ntxhia ntawm 9 ntawm Mohs nplai, thib ob tsuas yog pob zeb diamond thiab moissanite ntawm cov khoom ntuj)
Qhov kub siab heev (2030 ° C)
Daim duab qhia ntxaws ntxaws
