China rtp annealing Manufacturers, Suppliers, Factory

According to reports from German media, U.S. chip manufacturer Wolfspeed is pausing its plans to build a semiconductor plant in Germany.

Specialty graphite is graphite with carbon mass fraction greater than 99.99%, also known as "three high graphite" (high strength, high density, high purity). It is characterized by high strength, high density, high purity, high chemical stability, high thermal and electrical conductivity, high temperature resistance, radiation resistance, strong lubrication and easy processing. Isostatic graphite belongs to specialty graphite.

Within the silicon carbide (SiC) industry chain, substrate suppliers hold significant leverage, primarily due to value distribution. SiC substrates account for 47% of the total value, followed by epitaxial layers at 23%, while device design and manufacturing constitute the remaining 30%. This inverted value chain stems from the high technological barriers inherent to substrate and epitaxial layer production. Three major challenges plague SiC substrate growth: stringent growth conditions, slow growth rates, and demanding crystallographic requirements. These complexities contribute to increased processing difficulty, ultimately resulting in low product yields and high costs. Furthermore, the epitaxial layer’s thickness and doping concentration are critical parameters directly impacting the final device performance.

Currently, most SiC substrate manufacturers use a new crucible thermal field process design with porous graphite cylinders: placing high-purity SiC particle raw materials between the graphite crucible wall and the porous graphite cylinder, while deepening the entire crucible and increasing the crucible diameter.