Double Side Polished LED Sapphire Wafer IN 2 Inch With Flat
Sapphire (Sapphire, also known as white sapphire, molecular formula
Al2O3) single crystal is an excellent multifunctional material. It
has high temperature resistance, good thermal conductivity, high
hardness, infrared transmission and good chemical stability. Widely
used in many fields of industry, national defense and scientific
research (such as high-temperature infrared windows, etc.). At the
same time, it is also a widely used single crystal substrate
material, and it is the first choice for the blue, violet, and
white light emitting diode (LED) and blue laser (LD) industries
(the sapphire substrate needs to be epitaxial gallium nitride film
first) , Is also an important superconducting film substrate.
Generally, the epitaxial layers of GaN-based materials and devices
are mainly grown on sapphire substrates. Sapphire substrate has
many advantages: firstly, the production technology of sapphire
substrate is mature and the device quality is good; secondly,
sapphire is very stable and can be used in the high-temperature
growth process; finally, sapphire has high mechanical strength and
is easy to handle And cleaning. Therefore, most processes generally
use sapphire as the substrate.
The C-Plane sapphire substrate is used to grow III-V and II-VI
group deposited films, such as gallium nitride, which can produce
blue LED products, laser diodes, and infrared detector
applications. This is mainly because the process of sapphire
crystal growth along the C axis is mature, the cost is relatively
low, and the physical and chemical properties are stable. The
technology for epitaxial growth on the C surface is mature and
stable. The C axis has crystal gloss, and the other axes have
negative gloss; the C plane is flat and it is best to cut.
Produc Requirements of 2 inch sapphire wafer
The product specified herein shall be manufactured from high
quality optical grade sapphire crystals.
| Parameter | Specification |
| Crystal Orientation | C-axis (0001)miscut to M |
| Mis-Orientation Towards Laser Mark | 0.2° off axis ± 0.1°Towards M axis |
| Mis Orientation Towards Primary Flat | 0°± 0.15° |
| Diameter | 50.8mm ± 0.10mm |
| Thickness | 430um ± 15um |
| Orientation Flat Location | A-axis ± 0.2° |
| Major Flat Length | 16.0mm± 1.0mm |
| Surface Finish | Epi Polished one side, Ra<0.3nm |
| Back Surface | 0.8~1.2um |
| Edge Condition | Edge defect not to exceed SEMI M3-91, Table 2 |
| TTV | < 5um |
| LTV | <2um |
| Bow | -10~ 0 um |
| Warp | < 10um |
| Wafer ID | None |
| Cleanliness | No visual contamination |
| Packaging | Substrates to be Packaged in a class 100 clean room environment, in
vacuum packed cassettes of 25pcs. |
FQA
1. Are you a trading company or factory?
We are a professional factory of sapphire products, also a trading
company .
2.Can you do customized products?
Yes, we specialized in customized production or OEM work.
CAD,3D drawing are needed.
3.Could you provide samples?
Yes, we could provide samples with a charge, but if you place the
order with a quality above 100pcs, the sample charge will be
refunded.
4.What’s the delivery time?
It depends on the type of products and the quality.
For watch case, the regular time is around 5-8 weeks for 200pcs
according to the difficulty of the processing.
5.How about the payment?
T/T payment is prefered.
6.How about the delivery?
Mostly by air, like DHL, Fedex.
Why US?
1. We’re the rare source manufacturer of color sapphire boule, and
the most professional factory of sapphire processing, especially
the special watch case.
2. We have our own sapphire grown equipent with CZ and KY method.
3. Professional customized production according to the drawing
provided by clients.
4. Precision work of sapphire processing and polishing.
5. Experienced technicians and skilled workers.
