Patent ID: 8349684

Claim:
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: implanting a first dosage of conductivity dopants in the substrate before the forming the second control terminal sidewall spacer structure; implanting a second dosage of conductivity dopants in the substrate, wherein the implanting the second dosage occurs after the forming the second control terminal sidewall spacer structure, wherein the second dosage is greater than the first dosage.