China GaN Plasma Etching Manufacturers, Suppliers, Factory

In the process of wafer preparation, there are two core links: one is the preparation of the substrate, and the other is the implementation of the epitaxial process. The substrate, a wafer carefully made of semiconductor single crystal material, can be directly put into the wafer manufacturing process as a basis to produce semiconductor devices, or further enhance the performance through the epitaxial process.

Carbon/carbon composite materials refer to composite materials composed of carbon fiber reinforcement and carbon-based matrix. They have the characteristics of low density, high strength, high specific modulus, low thermal expansion coefficient, etc. Their super high temperature resistance makes them the most promising high-temperature material.

Alumina ceramic components have excellent properties such as high hardness, high mechanical strength, super wear resistance, high temperature resistance, high resistivity, and good electrical insulation performance.

In traditional silicon power device fabrication, high-temperature diffusion and ion implantation stand as the primary methods for dopant control, each with its advantages and disadvantages. Typically, high-temperature diffusion is characterized by its simplicity, cost-effectiveness, isotropic dopant distribution profiles, and lower introduction of lattice damage. Conversely, ion implantation, though complex and costly, enables precise independent control over dopant concentration and depth but introduces a significant number of point defects and extended defects into the substrate.

The four main molding methods for graphite molding are: extrusion molding, molding, vibratory molding and isostatic molding. Most of the common carbon/graphite materials on the market are molded by hot extrusion and molding (cold or hot), and isostatic molding is a method with leading molding performance. Vibration molding is generally used to manufacture medium and coarse structural graphite, particle size between 0.5-2mm particle size, generally dominated by di-roasted graphitized products, density between 1.55-1.75kg/m³, coarser particles, rougher surface, can not be used for precision machining. It is mainly used in chemical industry and metal smelting.