Patent ID: 6469357
Filing Date: 2002-10-22
Classification: C23C,H01L,H01S

Abstract:
Article comprising a planar semiconductor substrate having a major surface of (001) orientation, and an oxide layer disposed on the major substrate and forming an interface therewith, with the interface having an interface state density of 1011 cmâˆ’2eVâˆ’1 or less, and the oxide layer being epitaxial with the major surface;CHARACTERIZED IN THATa) said semiconductor is a GaAs-based semiconductor; b) said oxide layer is selected from the group consisting of the oxides having cubic crystal structure of the Mn2O3 type and having composition X2O3, where X is selected from the group consisting of Y and the rare earth elements; c) at least a portion of said major surface is a reconstructed surface, and said oxide layer is formed on said reconstructed surface such that the oxide layer has (011) orientation, with the oxide layer being a single domain oxide layer having a thickness less than 5 nm; whereby d) said article has high breakdown voltage across the oxide layer, has high capacitance per unit area of the oxide layer, and has low leakage current.