Patent ID: 8198181
Filing Date: 2012-06-12
Classification: G11C,H01L

Abstract:
1. A method of forming a switching element comprising the steps of: providing a layered article, the layered article comprising a first semiconductor layer, an insulating layer, and a second semiconductor layer; forming a first mask region, wherein the first mask region protects only a first portion of the layered article; doping only a second portion of the second semiconductor layer using a first energy level; forming a second mask region, wherein the second mask region protects only a third portion of the layered article, wherein the first portion and the third portion of the layered article only partially overlap; doping only a fourth portion of the first semiconductor layer using a second energy level, wherein the first energy level and the second energy level are different, thereby forming a doped layered article; forming a contact mask on only a portion of the doped layered article; etching a portion of at least the second semiconductor layer, the insulating layer, and the first semiconductor layer; forming a first and a second metal contact in the etched regions of the second semiconductor layer, the insulating layer, and the first semiconductor layer.