Patent ID: 9543435
Date: 2017-01-10
CPC Classifications: H01L

Claim:
1. An asymmetrical finFET device, comprising: at least one semiconductor fin on an upper surface of a semiconductor substrate, the at least one fin extending along a length of the semiconductor substrate to define a fin length; a plurality of gate structures that wrap around the sidewalls and upper fin surface of the at least one semiconductor fin, the plurality of gate structures including at least one desired gate structure surrounded by at least one sacrificial gate structure; a first source/drain region of the semiconductor fin formed adjacent a first sidewall of the at least one desired gate structure, and a second source/drain region of the semiconductor fin formed adjacent a second sidewall of the at least one desired gate structure opposite the first sidewall, a pair of opposing asymmetrical spacers on respective sidewalls of the desired gate structure, wherein the pair of opposing asymmetrical spacers include a first gate spacer and a second gate spacer that are non-uniform with respect to one another to define a spacer thickness differential such that dimensions of the first and second source/drain regions are asymmetrical with respect to one another.