Ceramic Substrate Series-Introduction to Ceramic Substrate Materials
Ceramic substrates are commonly used materials in electronic packaging, serving as the support base for electronic components. In comparison to common materials such as metals and plastic composites, ceramic substrates possess the following characteristics:
1.Excellent Insulation and High Reliability.
2.Low Dielectric Constant and Good High-Frequency Characteristics.
3.Low Coefficient of Thermal Expansion and Low Thermal Mismatch.
4.High Thermal Conductivity.
Currently, several commonly used electronic ceramic substrate materials include alumina (Al2O3), aluminum nitride (AlN), and silicon nitride (Si3N4). Due to the excellent properties of electronic ceramic substrates, they are widely applied in fields such as electronics, optoelectronics, telecommunications, aerospace, among others:
Alumina ceramic substrates are the most commonly used ceramic substrates due to their good insulation, chemical stability, mechanical properties, and low cost. However, due to the relatively low thermal conductivity of alumina substrates and poor thermal expansion coefficient matching with silicon, the application prospects of alumina materials in high-power module packaging are not optimistic.They are mainly applied in the middle to low-power range sectors, such as general-purpose power electronics, concentrated photovoltaics, automotive semiconductor modules, etc.
Aluminum nitride substrates are made from high thermal conductivity aluminum nitride ceramics, with a thermal conductivity as high as 170w/mk, the highest among all our ceramic materials. Additionally, AlN's thermal expansion coefficient matches well with semiconductors like Si, SiC, and GaAs, effectively reducing internal stresses within modules.However, due to the high cost of producing aluminum nitride compared to alumina, it is primarily applied in high-end industries, such as high-power semiconductor devices, large-scale integrated circuits, high-power LED heat sinks, etc.
Compared to alumina and aluminum nitride, silicon nitride ceramics boast superior mechanical properties. They also feature high thermal conductivity, excellent thermal radiation, heat cycle resistance, and reliability. Utilizing silicon nitride ceramic substrates ensures circuit boards possess significant flexural strength, resistance to bending, thermal shock, and thermal conductivity, thereby guaranteeing the reliability of high-power modules during operation.Silicon nitride ceramic substrates are more suitable for applications with significant mechanical vibration, thermal shock, large current surges, and demanding requirements for high reliability and stability, such as aerospace, rail transportation, electric vehicles, photovoltaic inverters, smart grids, etc.
XIAMEN MASCERA TECHNOLOGY CO., LTD. is a reputable and reliable supplier specializing in manufacturing and sales of technical ceramic parts. We provide custom production and high precision machining for a wide series of high performance ceramic materials including alumina ceramic, zirconia ceramic, silicon nitride, silicon carbide, boron nitride, aluminum nitride and machinable glass ceramic. Currently, our ceramic parts can be found in many industries like mechanical, chemical, medical, semiconductor, vehicle, electronic, metallurgy etc. Our mission is to provide the best quality ceramic parts for global users and it is a big pleasure to see our ceramic parts work efficiently in customers' specific applications. We can cooperate on both prototype and mass production, welcome to contact us if you have demands
