Patent ID: 8349684
Filing Date: 2013-01-08
Classification: H01L

Abstract:
1. A method of forming a semiconductor device with a control terminal, a first current terminal region, and a second current terminal region, the method comprising: forming a control terminal structure of the control terminal over a substrate, the substrate including semiconductor material; forming a layer of high-K dielectric material over the substrate and over the control terminal structure; forming a control terminal sidewall spacer structure of high-K dielectric material for the control terminal structure from the layer of high-K dielectric material, wherein the forming includes etching the layer of high-K dielectric material, wherein the control terminal sidewall spacer structure has a top side that is located closer to the substrate than a mid-plane of the control terminal structure; forming the first current terminal region and the second current terminal region, wherein the first current terminal region and the second current terminal region each include a portion located in the substrate; forming a second control terminal sidewall spacer structure for the control terminal after the etching the layer, wherein the forming the second control terminal sidewall spacer structure includes forming a layer of lower-K dielectric material over the substrate including over the control terminal structure and over the control terminal sidewall spacer structure and etching the layer of lower K dielectric material, wherein the second control terminal sidewall spacer structure has a top surface that is farther from the substrate than the mid-plane; wherein the forming the first current terminal region and the second current terminal region includes: