Patent ID: 7772676
Filing Date: 2010-08-10
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a semiconductor body comprising a first semiconductor material; and a compound semiconductor region embedded in the semiconductor body such that a side portion of the compound semiconductor region abuts a side portion of the semiconductor body, the compound semiconductor region including the first semiconductor material and a second semiconductor material, wherein the compound semiconductor region has an upper surface that extends beyond the upper surface of the semiconductor body, wherein the compound semiconductor region has a concentration of the second semiconductor material that varies along an interface between the side portion of the compound semiconductor region and the side portion of the semiconductor body, wherein the variation along the interface comprises a lower first region adjacent the interface, a second region disposed on the first region, and a third region disposed on the second region, wherein the concentration of the second semiconductor material in the first region increases about linearly from a first concentration to a second concentration, wherein the concentration of the second semiconductor material in the third region decreases about linearly from the second concentration to a third concentration, and wherein the concentration of the second semiconductor material has a peak value adjacent an upper surface of the semiconductor body.