Patent ID: 7217324
Filing Date: 2007-05-15
Classification: C30B,H01L

Abstract:
1. A method for producing an electronic GaAs detector for X-ray detection for imaging, wherein an epitaxial layer is grown on a substrate n + (or p + ) to form a semiconductor material, which includes a predetermined residual doping, wherein a thickness of the substrate is reduced by mechanical-chemical polishing, wherein a p + /i/n + structure is formed by implanting ions p + (or n + ) on an external face of the semiconductor material, wherein said p + /i/n + structure is annealed at a temperature 0 1 for a duration t i , and wherein ohmic contacts are disposed on both faces of the p + /i/n + structure, wherein individual detectors are produced by masking, passivation and chemical pickling, said method comprises the following steps: providing parallelism and thermal insulation between the substrate n heating said source material to a temperature T heating said substrate n chemically interacting a reactive gas with the source material of temperature T transporting said volatile products to said substrate n+ (or p+) by a pressure gradient between said heated source material and said heated substrate n+ (or p+); chemically interacting said volatile products at the surface of said substrate n wherein a resulting thickness of the epitaxial layer is attained that is sufficient to efficiently absorb X photons.