China Silicon Carbide Ring Manufacturer, Supplier, Factory

Wafer CMP polishing slurry is a specially formulated liquid material used in the CMP process of semiconductor manufacturing. It consists of water, chemical etchants, abrasives, and surfactants, enabling both chemical etching and mechanical polishing.

In the process of growing silicon carbide (SiC) crystals via the Physical Vapor Transport (PVT) method, the extreme high temperature of 2000–2500 °C is a “double-edged sword” — while it drives the sublimation and transport of source materials, it also dramatically intensifies impurity release from all materials within the thermal field system, especially trace metallic elements contained in conventional graphite hot-zone components. Once these impurities enter the growth interface, they will directly damage the core quality of the crystal. This is the fundamental reason why tantalum carbide (TaC) coatings have become a “mandatory option” rather than an “optional choice” for PVT crystal growth.

SiC-coated graphite wafer carriers are critical thermal and mechanical components in MOCVD systems for GaN and LED epitaxy. This technical article explains how carrier geometry, pocket depth, flatness, graphite properties and CVD SiC coating condition influence wafer temperature distribution, epitaxial uniformity and process repeatability. It also examines the relationship between thermal uniformity and device yield, common coating degradation mechanisms, service-life considerations and the engineering data required when specifying a custom or replacement MOCVD wafer carrier.

When you see the third-generation semiconductors, you will surely wonder what the first and second generations were. The "generation" here is classified based on the materials used in semiconductor manufacturing.

High purity: The silicon epitaxial layer grown by chemical vapor deposition (CVD) has extremely high purity, better surface flatness and lower defect density than traditional wafers.

This article introduces the latest developments in the newly designed PE1O8 hot-wall CVD reactor of the Italian company LPE and its ability to perform uniform 4H-SiC epitaxy on 200mm SiC.