Patent ID: 8390028
Filing Date: 2013-03-05
Classification: H01L

Abstract:
1. A semiconductor device, comprising: an element isolation insulating film formed on a substrate; an element region and a dummy pattern region demarcated by the element isolation insulating film on the substrate; a first epitaxial crystal layer formed on the substrate within the element region, and being made up of crystals that have a different lattice constant from that of the crystals that constitute the substrate; and a second epitaxial crystal layer formed on the substrate within the dummy pattern region, and being made up of the same crystals as the first epitaxial crystal layer, the (111) plane of the substrate that includes any points on an interface between the second epitaxial crystal layer and the substrate being surrounded by the element isolation insulating film in a deeper region than the second epitaxial crystal layer, wherein the second epitaxial crystal layer is embedded within a trench formed on the surface of the substrate, and the side surface and the bottom surface of the second epitaxial crystal layer contact the substrate.