Sapphire Substrate
Kev piav qhia
Sapphire (Al2O3) ib leeg siv lead ua yog ib qho khoom siv zoo heev.Nws muaj qhov kub thiab txias tsis kam, zoo thermal conduction, siab hardness, infrared kis tau tus mob thiab zoo tshuaj stability.Nws yog dav siv nyob rau hauv ntau yam kev lag luam, kev tiv thaiv lub teb chaws thiab kev tshawb fawb (xws li kub kub infrared qhov rais).Nyob rau tib lub sijhawm, nws kuj yog ib hom siv dav siv ib qho khoom siv lead ua substrate.Nws yog thawj qhov kev xaiv substrate nyob rau hauv tam sim no xiav, violet, dawb lub teeb-emitting diode (LED) thiab xiav laser (LD) kev lag luam (gallium nitride zaj duab xis yuav tsum tau epitaxial ntawm sapphire substrate ua ntej), thiab nws kuj yog ib qho tseem ceeb superconducting. zaj duab xis substrate.Ntxiv nrog rau Y-system, La system thiab lwm cov yeeb yaj kiab uas muaj qhov kub thiab txias, nws kuj tseem tuaj yeem siv los loj hlob cov yeeb yaj kiab tshiab MgB2 (magnesium diboride) superconducting films (feem ntau cov khoom siv lead ua ib leeg yuav raug tshuaj corroded thaum lub sij hawm tsim MgB2. zaj duab xis).
Cov khoom
| Crystal Purity | > 99.99% |
| Melt Point (℃) | 2040 |
| Qhov ceev (g / cm3) | 3.98 ib |
| Hardness (Mho) | 9 |
| Thermal Expansion | 7.5 x 10-6/oC) |
| Tshwj xeeb kub | 0.10 cal /oC) |
| Thermal conductivity | 46.06; 0oC 25.12 @ 100oC, 12.56 @ 400 NwsoC (W / (mK)) |
| Dielectric tsis tu ncua | ~ 9.4 @ 300K ntawm A axis ~ 11.58 @ 300K ntawm C axis |
| Poob Tangent ntawm 10 GHz | <2 x 10-5ntawm A axis, <5 x 10-5ntawm C axis |
Sapphire Substrate txhais
Sapphire substrate yog hais txog cov khoom siv pob tshab crystalline ua los ntawm ib qho siv lead ua txhuas oxide (Al2O3).Lo lus "sapphire" feem ntau yog siv los piav txog ntau yam corundum gemstone, uas feem ntau yog xiav xim.Txawm li cas los xij, nyob rau hauv cov nqe lus ntawm substrates, sapphire yog hais txog ib qho kev cog qoob loo, tsis muaj xim, siab purity siv lead ua siv ntau yam.Nov yog qee cov ntsiab lus tseem ceeb ntawm sapphire substrates:
1. Cov qauv siv lead ua: Sapphire muaj cov qauv siv lead ua hexagonal nyob rau hauv uas aluminium atoms thiab oxygen atoms tau rov ua dua.Nws belongs rau lub trigonal crystal system.
2. High hardness: Sapphire yog ib qho ntawm cov ntaub ntawv nyuaj tshaj plaws paub, nrog rau Mohs hardness ntawm 9. Qhov no ua rau nws muaj kev khawb thiab puas resistant, ua rau nws durability thiab ntev nyob rau hauv daim ntawv thov.
3. Lub teeb kis tau tus mob: Sapphire muaj lub teeb kis tau zoo, tshwj xeeb tshaj yog nyob rau thaj tsam pom thiab ze-infrared.Nws tuaj yeem xa lub teeb los ntawm kwv yees li 180 nm txog 5500 nm, ua rau nws tsim nyog rau ntau yam kev siv kho qhov muag thiab optoelectronic.
4. Thermal thiab mechanical zog: Sapphire muaj zoo thermal thiab mechanical zog, siab melting point, tsawg thermal expansion coefficient, thiab zoo heev thermal conductivity.Nws tuaj yeem tiv taus qhov kub thiab txias, txhua yam kev ntxhov siab thiab thermal cycling, ua rau nws haum rau kev kub siab thiab kev siv hluav taws xob siab.
5. Chemical stability: Sapphire muaj tshuaj lom neeg ruaj khov thiab tuaj yeem tiv taus cov kua qaub feem ntau, alkalis thiab cov kuab tshuaj organic.Qhov no feature ua kom nws durability thiab kev ntseeg siab nyob rau hauv ntau yam hnyav ib puag ncig.
6. Cov khoom hluav taws xob rwb thaiv tsev: Sapphire yog cov khoom siv hluav taws xob zoo heev, uas muaj txiaj ntsig zoo rau cov ntawv thov uas xav tau hluav taws xob cais lossis rwb thaiv tsev.
7. Daim ntawv thov: Sapphire substrates yog dav siv nyob rau hauv optoelectronics, semiconductors, lub teeb-emitting diodes, laser diodes, kho qhov muag qhov rais, saib muaju thiab kev tshawb fawb.
Sapphire substrates muaj nuj nqis heev rau lawv kev sib xyaw ua ke ntawm optical, mechanical, thermal thiab chemical zog.Nws cov khoom siv zoo heev ua rau nws tsim nyog rau cov ntawv thov uas xav tau kev ua haujlwm siab, siab kho qhov muag pom tseeb, hluav taws xob rwb thaiv tsev thiab tiv thaiv ib puag ncig.
