premium games customized business gifts 1 beijing tianke heda semiconductor co., ltd. was established in september 2006 and is headquartered in daxing district, beijing. it is one of the first national high-tech enterprises in the research, development, production and sales of third-generation semiconductor silicon carbide single crystal substrates and related products. it is also a domestic silicon carbide substrate supplier with a large production scale and a wide range of products in the field of silicon carbide single crystal substrates. 30 people
