|Industry:||Semiconductor Substrate||Materials:||Sic Crystal|
|Application:||5G, Device Material, MOCVD,power Electronics||Type:||4H-N,semi ,No Doped|
|Color:||Green,blue, White||Hardeness:||9.0 Up|
silicon carbide substrate,
6inch sic substrates, 4h-n,4H-SEMI,sic ingot sic crystal ingots sic crystal block sic semiconductor substrates,High purity silicon carbide
SiC crystal are cutted into slices, and polishing, the SiC wafer comes. For specification and details, please visit below page.
SiC crystal growth
Bulk crystal growth is the technique for fabrication of single crystalline substrates , making the base for further device processing.To have a breakthrough in SiC technology obviously we need production of SiC substrate with a reproducible process.6H- and 4H- SiC crystals are grown in graphite crucibles at high temperatures up to 2100—2500°C. The operating temperature in the crucible is provided either by inductive (RF) or resistive heating. The growth occurs on thin SiC seeds. The source represents polycrystalline SiC powder charge. The SiC vapor in the growth chamber mainly consists of three species, namely, Si, Si2C, and SiC2, which are diluted by carrier gas, for example, Argon. The SiC source evolution includes both time variation of porosity and granule diameter and graphitization of the powder granules.
SiC epi wafer
SiC Crystal Structure
SiC Crystal has many different crystal structures,which is called polytypes.The most common polytypes of SiC presently being developed for electronics are the cubic 3C-SiC, the hexagonal 4H-SiC and 6H-SiC, and the rhombohedral 15R-SiC. These polytypes are characterized by the stacking sequence of the biatom layers of the SiC structure
sic crystal defects
Most of the defects which were observed in SiC were also observed in other crystalline materials. Like the dislocations, stacking faults (SFs), low angle boundaries (LABs) and twins. Some others appear in materials having the Zing- Blend or the Wurtzite structure, like the IDBs. Micropipes and inclusions from other phases mainly appear in SiC.
SiC crystal application
Many researchers know the general SiC application:III-V Nitride Deposition;Optoelectronic Devices;High Power Devices;High Temperature Devices;High Frequency Power Devices.But few people knows detail applications, We list some detail
material application and advantagement
• Low lattice mismatch
• High thermal conductivity
• Low power consumption
• Excellent transient characteristics
• High band gap
• GaN epitaxy device
• Optoelectronic device
• High frequency device
• High power device
• High temperature device
• Light emitting diodes
|Property||4H-SiC, Single Crystal||6H-SiC, Single Crystal|
|Lattice Parameters||a=3.076 Å c=10.053 Å||a=3.073 Å c=15.117 Å|
|Density||3.21 g/cm3||3.21 g/cm3|
|Therm. Expansion Coefficient||4-5×10-6/K||4-5×10-6/K|
|Refraction Index @750nm||
no = 2.61
ne = 2.66
no = 2.60
ne = 2.65
|Thermal Conductivity (N-type, 0.02 ohm.cm)||
|Thermal Conductivity (Semi-insulating)||
|Band-gap||3.23 eV||3.02 eV|
|Break-Down Electrical Field||3-5×106V/cm||3-5×106V/cm|
|Saturation Drift Velocity||2.0×105m/s||2.0×105m/s|
Q:How about the delivery time and quality.
A: We have strict quality inspection system. and Delivey by DHL, Fedex, EMS by your require
Q: Are you a trading company or a factory?
A: We have a wafer process factory, which can reduce all cost we can control.
Q: What’s your main products?
A: There are saphire wafer,sic,Quartz wafer .We can also produce special shape
products according to your drawing.
Q: What’s your advantage?
1. Price. We are not only a trading company, so we can get the most competitive price for you and ensure our products quality ＆price as well as the delivery time.
2. Technology. Our company has 5-year experience on producing wafer ＆ optical products.
3. After-sales service. We can be responsible for our quality.
Shipment ＆ package
Contact Person: Wang