Diamond wafer hardcore application - satellite mobile phone communication

Like other electronic related fields, with the continuous development and progress of technology, electronic information technology requires an increasing amount of data transmission, especially mobile phones, satellite broadcasing, and wireless network systems. High frequency surface acoustic wave (SAW) devices are a target among devices that help meet this demand.

Compared with traditional vibration film materials such as carbon fiber film, ceramic film, beryllium film, etc., they do not have the lower density and better acoustic damping characteristics of diamond film, low density, high fidelity, and excellent high-frequency response characteristics. In addition, diamond wafer can cause internal losses at its grain boundaries. Compared with other materials, speaker vibration films made of diamond film are better. Due to the extremely high elastic modulus of diamond, it can be used as a surface acoustic wave (SAW) device. One effective way to increase the operating frequency of the device is to use a medium material with high sound velocity. Diamond (11000 meters/second) is known to have the fastest propagation speed of sound in materials, which can greatly increase the operating frequency of SAW, thereby converting radio frequency signals into mechanical vibrations. This has broad application prospects in satellite and mobile phone communication.

Advantages of satellite mobile phones made of diamond wafers:

1. The fastest sound propagation rate;

2. High elastic modulus;

3. Lower mass density;

4. High thermal conductivity, clear and accurate sound positioning;

5. High fidelity;

6. Excellent high-frequency response characteristics;

7. Maximum hardness;

8. Good acoustic damping characteristics;

CSMH focuses on the research and production of diamonds, with diamond wafers Ra<1nm and diamond heat sinks having a thermal conductivity of 1000-2000W/m.k. It also offers products such as diamond optical windows, diamond heterojunction integrated composite substrates, and AlN thin films. At present, the product is widely used in fields such as 5G base stations, lasers, new energy vehicles, new energy photovoltaics, aerospace, and national defense and military industry.