Patent ID: 11955251
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A conductive GaAs single crystal substrate cut from a conductive GaAs single crystal, comprising:
a polished mirror surface;
an atomic concentration of Si being more than 1×1017 cm−3; and
a density of precipitates having sizes of at least 30 nm being at most 400 cm−2; wherein
on the polished mirror surface a density of microscopic defects having sizes of at least 0.265 μm measured by a surface particle inspection device is at most 0.3 cm−2, and
an average dislocation density of the substrate is at most 92 cm−2, and
dopants contained in the substrate consist of Si.