Sapphire Wafer ¶õ?
Al2O3°¡ 2300µµ À̻󿡼 ´Ü°áÁ¤À¸·Î ¼ºÀåµÈ °áÁ¤Ã¼¸¦ Sapphire¶ó°í ÇÕ´Ï´Ù.
Sapphire Ư¼º
1. Àú¿Â ¹× °í¿Â ¾ÈÁ¤¼º
- ±ØÀú¿Â¿¡¼ ÃÊ°í¿Â±îÁö »óº¯Å¾øÀÌ ¸Å¿ì ¾ÈÁ¤ÀûÀÌ´Ù.
2. ¿ì¼öÇÑ ±â°èÀû ¼ºÁú (Knoop 2000), °æµµ°¡ Mohs9 ·Î½á ´ÙÀ̾Ƹóµå ´ÙÀ½À¸·Î ³ô´Ù.»ê°ú ¾ËÄ«¸®¿¡ »ó´çÈ÷ °ÇÔ.
3. ¶Ù¾î³ ±¤ÇÐƯ¼º
-ºûÀÇ Åõ°ú¼ºÀÌ °¡Àå ¶Ù¾î³ Àç·á, Index of refraction : 1.769
4. ¿ì¼öÇÑ ¿Àü´Þ Ư¼º
- ¼¼¶ó¹Í Àç·áÁß¿¡¼ ±Ý¼Ó°ú ¸Â¸Ô´Â ¿Àüµµµµ¸¦ °¡Áü
- ¿Àüµµµµ : 20-25w/m/k
- Dielectric constant : 7.5 to 13
- Electrical resistance 10¹©ùohm/cm at 500C
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Chemical Formula |
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Crystal Class |
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Molecular Weight |
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Density ( g/cm8)(20µµ) |
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Reflection Loss, % for two surface at 4um |
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Dielectric Constant for 102-108Hz at 298
Parallel
Perpendicular |
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Melting Temperature |
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Thermal Conductivity,W/(mk) at 300K
Parallel
Perpendicular |
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Thermal Expansion,1/K at 293K
Parallel
Perpendicular |
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Dielectric Constant at 1Mhz
Parallel
Perpendicular |
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Bandgap,ev |
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Solubility in water |
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Knoop Hardness,kg/mm2 |
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Young's Modulus,GPa |
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Shear Modulus,GPa |
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Bulk Modulus,GPa at 273 K |
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Apparent Elastic Limit,MPa |
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Poisson's Ratio |
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Orientation
1. Orientations
Sapphire ´Â Hexagon/rhombohedral ±¸Á¶·Î ¸¹Àº Ư¼ºÀÌ °áÁ¤ÀÇ ¹æÇâ¿¡ µû¶ó °áÁ¤ÀÌ µÈ´Ù. Epi growth ¿¡ ´ëÇؼ´Â, ´Ù¸¥ °áÁ¤ ¹æÇâÀº epi ¹°Áú°ú ÀÏÄ¡ÇÏ´Â °ÝÀÚ»ó¼öÀÇ ¹üÀ§¸¦ °¡Á®¾ß ÇÑ´Ù.
2. Substrates
C-plane sapphire ±âÆÇÀº Blue LED ¿¡ »ç¿ëµÇ´Â GaN °ú °°Àº 3-5Á·°ú 2-4Á·¿¡ »ç¿ëµÇ¾îÁø´Ù. ´õ¿íÀÌ, C-plane Àº infrared detector ÀÇ Àû¿ëºÐÀ¯¿¡ À¯¿ëÇÏ´Ù.
A-plane ±âÆÇÀº ÀÏÁ¤ÇÑ À¯ÀüÀ²À» °¡Áö°í, hybrid microelectronic application ¿¡ »ç¿ëµÇ¾îÁö´Â ³ôÀº Àý¿¬¼ºÀ» ¶ÇÇÑ °¡Áø´Ù. High Tc superconductors Àº ÀÌ ±âÆÇÀ» »ç¿ëÇÏ¿©¼ ¸¸µé¾îÁú ¼ö°¡ ÀÖ´Ù.
R-plane ±âÆÇÀº microelectronic IC ¿¡ »ç¿ëÀ» À§Çؼ ½Ç¸®ÄÜÀÇ Hetero-epitaxial ÁõÂø¿¡ »ç¿ëµÇ¾îÁø´Ù. Sapphire ´Â ³ôÀº À¯ÀüÀ² ¶§¹®¿¡ microwave IC ¿Í °°Àº hybrid ±âÆÇ¿¡ »ç¿ëÀÌ Àû´çÇÏ´Ù. °Ô´Ù°¡, epitaxial ½Ç¸®ÄÜ °úÁ¤¿¡ Çʸ§À» ¹Ù¸¦ ¶§, ºü¸¥ ¼ÓµµÀÇ IC ¿Í pressure transducers ÀÌ ¸¸µé¾î Áú ¼ö ÀÖ´Ù. Thallium ¼ºÀå½Ã, ´Ù¸¥ superconducting components, high impedance resistors, and GaAs ÀÌ Àû¿ëµÉ ¼ö ÀÖ´Ù.
3. Application
- GaN, 3-5 Á·, 2-4Á· Compounds
- IR Detectors
- High Tesuperconductors and High Frequency Dielectrics.
High speed IC's and Pressure Transducers
GaAs wafer carriers
SOS (Silicon On Sapphire)
Orientation : A-Plane(1120), C-Plane(0001), R-Plane(1012) ¶Ç´Â Size up to 4" diameter.
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