Patent ID: 8324660
Filing Date: 2012-12-04
Classification: H01L,Y02E

Abstract:
1. A semiconductor structure comprising: (a) a substrate having a surface and comprising a first semiconductor material; (b) a dislocation-blocking mask disposed over the substrate, the dislocation-blocking mask having a trench extending to the surface of the substrate, the trench being defined by at least one sidewall, the sidewall having a height h at least equal to a predetermined distance H from the surface of the substrate, the trench exposing an exposed region of the substrate, the exposed region of the substrate having a substantially rectangular shape having a width w and a length l; and (c) a regrowth layer comprising a second semiconductor material formed in the trench, wherein a ratio of the height h to the width w is greater than 0.5, and wherein the length l is greater than the height h, and dislocation defects in the regrowth layer terminate at the sidewall of the trench at or below the predetermined distance H.