Patent ID: 9142651
Filing Date: 2015-09-22
Classification: H01L

Abstract:
1. A method of forming a FinFET device comprised of source/drain regions doped with a first type of dopant material and a channel region, the method comprising: forming a fin in a semiconductor substrate, said fin having sidewalls; covering a top surface and a portion of said sidewalls of said fin with etch stop material; after forming said etch stop material, forming a sacrificial gate structure above and around said fin; forming a sidewall spacer adjacent said sacrificial gate structure; performing at least one process operation to remove said sacrificial gate structure and thereby define a replacement gate cavity, wherein said etch stop material remains positioned on said fin while said sacrificial gate structure is removed; with said etch stop material positioned on said fin, performing at least one process operation through said replacement gate cavity to form a counter-doped region in a portion of said fin below an upper surface of said fin and below said channel region of said device, wherein said counter-doped region is doped with a second type of dopant material that is of an opposite type relative to said first type of dopant material; and forming a replacement gate structure in said replacement gate cavity.