Patent ID: 9029940
Filing Date: 2015-05-12
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate; a protrusion structure disposed over the substrate and protruding out of the plane of substrate; a gate stack disposed over the substrate, wherein the gate stack includes a planar portion, which is symmetrically to the protrusion structure and parallel to the surface of substrate and a gating surface, which wraps around a middle portion of the protrusion structure; and a source region disposed as a top portion of the protrusion structure, including overlapping with a top portion of the gating surface of the gate stack; a drain region disposed over the substrate symmetrically adjacent to the protrusion structure and extending to a bottom portion of the protrusion structure as a raised drain region; a source contact disposed on the source region; a gate contact disposed on the planar portion of the gate stack; a drain contact disposed on the drain region; and the source contact aligns with other two source contacts of two adjacent semiconductor devices such that each source contact locates in one of three angles of an equilateral triangle.