The three major indicators of semiconductor graphite selection

The semiconductor industry is an emerging science and technology industry, which has attracted great attention in recent years, more and more companies have begun to enter the semiconductor industry, and graphite has become one of the indispensable materials for the development of the semiconductor industry. Semiconductors need to use the electrical conductivity of graphite, because the higher the carbon content of graphite, the better the electrical conductivity, generally need to consider the indicators are: particle size, heat resistance, purity.

Grain size corresponds to different mesh numbers, and specifications are expressed in mesh numbers. The mesh number is the number of holes, that is, the number of holes per square inch. Generally speaking, mesh number * aperture (micron) =15000. The larger the mesh number of conductive graphite, the smaller the particle size, the better the lubrication performance, can be used in the field of lubricating materials production. The particle size used in the semiconductor industry should be very fine, because it is easier to achieve processing precision, high compressive strength, and relatively small loss, especially for sintering molds, requiring high processing accuracy.

Particle size distribution, such as: 20 mesh, 40 mesh, 80 mesh, 100 mesh, 200 mesh, 320 mesh, 500 mesh, 800 mesh, 1200 mesh, 2000 mesh, 3000 mesh, 5000 mesh, 8000 mesh, 12500 mesh, the most fine can be 15,000 mesh.

Many products in the semiconductor industry need to be continuously heated, in order to extend the service life of the device, which requires conductive graphite to have the following properties: excellent reliability and high temperature impact resistance.

The requirements for graphite production in the semiconductor industry are: the higher the purity, the better, especially the graphite devices that touch between the two, if they contain too many impurities, they will pollute the semiconductor material. Therefore, we need to strictly control the purity of conductive graphite, and we also need to treat them with high temperature graphitization in order to minimize the gray level.