Abstract
The 4-H Semi-Insulating SiC substrate is a high-performance semiconductor material with a wide
range of applications. It derives its name from its growth on the
4H crystal structure. This substrate exhibits exceptional
electrical characteristics, including high resistivity and low
carrier concentration, making it an ideal choice for radio
frequency (RF), microwave, and power electronic devices.
Key features of the 4-H Semi-Insulating SiC substrate include highly uniform electrical properties, low
impurity concentration, and outstanding thermal stability. These
attributes make it suitable for the fabrication of high-frequency
RF power devices, high-temperature electronic sensors, and
microwave electronic equipment. Its high breakdown field strength
and excellent thermal conductivity also position it as the
preferred substrate for high-power devices.
Furthermore, the 4-H Semi-Insulating SiC substrate demonstrates excellent chemical stability, allowing it
to operate in corrosive environments and expanding its range of
applications. It plays a critical role in industries such as
semiconductor manufacturing, telecommunications, defense, and
high-energy physics experiments.
In summary, the 4-H Semi-Insulating SiC substrate, with its outstanding electrical and thermal properties,
holds significant promise in the semiconductor field and provides a
reliable foundation for the production of high-performance
electronic devices.
Properties
Electrical Properties:
- High Resistivity: 4H Semi-Insulating SiC has very high resistivity, making it an excellent material for
semi-insulating applications where low electrical conductivity is
desired.
- High Breakdown Voltage: Due to its wide bandgap, 4H Semi-Insulating SiC has a high breakdown voltage, making it suitable for high-power
and high-voltage applications.
Thermal Properties:
- High Thermal Conductivity: SiC in general has high thermal conductivity, and this property
extends to 4-H Semi-Insulating SiC as well, aiding in efficient heat dissipation.
- Thermal Stability: This material maintains its properties and
performance even at high temperatures, making it suitable for use
in harsh thermal environments.
Mechanical and Physical Properties:
- Hardness: Like other forms of SiC, the 4-H Semi-Insulating variant is also very hard and abrasion-resistant.
- Chemical Inertness: It is chemically inert and resistant to most
acids and alkalis, ensuring stability and longevity in harsh
chemical environments.
| Polytype | Single Crystal 4H |
| Lattice Parameters | a=3.076 A
C=10.053 A |
| Stacking Sequence | ABCB |
| Band-gap | 3.26 eV |
| Density | 3.21 10^3 kg/m^3 |
| Therm. Expansion Coefficient | 4-5x10^-6/K |
| Refraction Index | no = 2.719
ne = 2.777 |
| Dielectric Constant | 9.6 |
| Thermal Conductivity | 490 W/mK |
| Break-Down Electrical Field | 2-4 108 V/m |
| Saturation Drift Velocity | 2.0 105 m/s |
| Electron Mobility | 800 cm^2NS |
| hole Mobility | 115 cm^2N·S |
| Mohs Hardness | 9 |
Optical Properties:
- Transparency in Infrared: 4H Semi-Insulating SiC is transparent to infrared light, which can be beneficial in
certain optical applications.
Advantages for Specific Applications:
- Electronics: Ideal for high-frequency and high-power devices due to
its high breakdown voltage and thermal conductivity.
- Optoelectronics: Suitable for optoelectronic devices that operate
in the infrared region.
- Power Devices: Used in the manufacturing of power devices such as
Schottky diodes, MOSFETs, and IGBTs.
4H Semi-Insulating SiC is a versatile material that is used in various high-performance
applications due to its exceptional electrical, thermal, and
physical properties.
About our company
SHANGHAI FAMOUS TRADE CO.,LTD. locates in the city of Shanghai,
Which is the best city of China, and our factory is founded in Wuxi city in 2014.
We specialize in processing a varity of materials into wafers,
substrates and custiomized optical glass parts.components widely
used in electronics, optics, optoelectronics and many other fields.
We also have been working closely with many domestic and oversea
universities, research institutions and companies, provide
customized products and services for their R&D projects.
It's our vision to maintaining a good relationship of cooperation with our all
customers by our good reputatiaons.
sale and customer survice
Materials Purchasing
The materials purchasing department is responsible to gather all
the raw materials needed to produce your product. Complete
traceability of all products and materials, including chemical and
physical analysis are always available.
Quality
During and after the manufacture or machining of your products
,quality control department is involved in making sure that all
materials and tolerances meet or exceed your specification.
Service
We pride ourselves in having sales engineering staff with over 5
years experiences in the semiconductor industry. They are trained
to answer technical questions as well as provide timely quotations
for your needs.
we are at your side by any time when you have problem,and resolve
it in 10hours.
