Patent ID: 7476578

Claim:
A process for forming a spacer on a finFET structure, comprising: providing a finFET structure free of a spacer material, the finFET structure comprising at least one vertical fin body formed of a single crystal semiconductor material with vertically-projecting sidewalls, source and drain regions at opposite ends of the fin body; and a gate structure intersecting a channel region of the fin body and electrically isolated from the fin body; depositing, in order, a conformal liner material, a conformal spacer material, and a conformal capping material onto the finFET structure; tilt implanting dopant ions into portions of the capping layer about the gate structure; selectively removing undoped capping material about the source and drain regions; selectively removing exposed portions of the spacer material; selectively removing exposed portions of the capping material; anisotropically removing a portion of the spacer material so as to expose a top surface of the gate material and isolate the spacer material to sidewalls of the gate structure; and removing the liner from the fin to form the spacer on the finFET structure.