Patent ID: 8481389
Filing Date: 2013-07-09
Classification: H01L

Abstract:
1. A method of forming a semiconductor device comprising: forming a replacement gate structure on a portion of a substrate, wherein source regions and drain regions are positioned on opposing sides of the replacement gate structure; forming an intralevel dielectric on the substrate having an upper surface that is coplanar with an upper surface of the replacement gate structure; removing the replacement gate structure to provide an opening to an exposed portion of the substrate, wherein sidewalls of the opening are provided by sidewalls of a remaining portion of the intralevel dielectric; forming a gate dielectric layer on at least the sidewalls of the opening and the exposed portion of the substrate; damaging a majority of the gate dielectric layer that is present on the sidewalls of the opening with an angled ion implantation, wherein a non-damaged portion of the gate dielectric layer is present at a base of the opening; removing the damaged portion of the gate dielectric layer selectively to the non-damaged portion of the gate dielectric layer; and forming a gate conductor of a functioning gate structure within the opening on the non-damaged portion of the gate dielectric layer.