Patent ID: 9082841
Filing Date: 2015-07-14
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a substrate; a drift region disposed in the substrate; an insulation layer disposed over the substrate and covering the drift region, the insulation layer including a first edge and a second edge opposite to the first edge; a gate layer disposed over the substrate and covering the first edge of the insulation layer; and a metal layer disposed over the substrate and the insulation layer, the metal layer including a metal portion connected to the gate layer and overlapping the first edge of the insulation layer, wherein the metal portion includes a first edge located closer to a central portion of the insulation layer than an opposite second edge of the metal portion, a distance from the first edge of the metal portion to the first edge of the insulation layer along a channel length direction is a, a distance from the first edge of the insulation layer to the second edge of the insulation layer is L, and a ratio of a/L is equal to or higher than 0.46.