Production of a solid body substrate used in the silicon switching circuits comprises a cylindrical solid body and cutting out substrate plates in the direction of the cylinder axis, and laterally joining several substrate plates

摘要

Production of a solid body substrate comprises preparing a cylindrical solid body and cutting out substrate plates (1, 2) in the direction of the cylinder axis; and laterally joining several substrate plates. An Independent claim is also included for a process for the production of a crystalline solid body layer comprising forming a solid body substrate as above; producing a crystalline solid body layer on the surface of the substrate; removing the crystalline solid body layer from the substrate; and carrying out the previous two steps. Preferred Features: The substrate is a silicon substrate and has crystallographic (100)-orientation.