Short Description:
With the development of science and technology, new requirements for the size and quality of sapphire crystal materials have been put forward. Now, with the rapid development of semiconductor lighting and other emerging applications, the market for low cost, high quality, large size sapphire crystals is expanding dramaticall.
12inch Sapphire Substrate Market Situation
At present, sapphire has two main uses, one is the substrate material, which is mainly LED substrate material, the other is the watch dial, aviation, aerospace, special manufacturing window material.
Although silicon carbide, silicon and gallium nitride are also available as substrates for leds in addition to sapphire, mass production is still not possible due to cost and some unresolved technical bottlenecks. Sapphire substrate through the technical development in recent years, its lattice matching, electrical conductivity, mechanical properties, thermal conductivity and other properties have been greatly improved and promoted, cost-effective advantage is significant, so sapphire has become the most mature and stable substrate material in the LED industry, has been widely used in the market, the market share as high as 90%.
Characteristic Of 12 Inch Sapphire Wafer Substrate
1. Sapphire substrate surfaces have an extremely low particle count, with fewer than 50 particles 0.3 microns or larger per 2 inches in the 2 to 8 inch size range, and major metals (K, Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn) below 2E10/cm2. The 12-inch base material is also expected to achieve this grade.
2. Can be used as a carrier wafer for the 12-inch semiconductor manufacturing process (in-device transport pallets) and as a substrate for bonding.
3. Can control the shape of concave and convex surface.
Material: High purity single crystal Al2O3, sapphire wafer.
LED quality, no bubbles, cracks, twins, lineage, no color..etc.
12 inch Sapphire Wafers
| Orientation | C-plane<0001> +/- 1 deg. |
| Diameter | 300.0 +/-0.25 mm |
| Thickness | 1.0 +/-25um |
| Notch | Notch or Flat |
| TTV | <50um |
| BOW | <50um |
| Edges | Protactive chamfer |
| Front side – polished 80/50 | |
| Laser mark | None |
| Packaging | Single wafer carrier box |
| Front side Epi ready polished (Ra <0,3nm) | |
| Back side Epi ready polished (Ra <0,3nm) | |
Detailed Diagram
