Patent ID: 9601489
Date: 2017-03-21
CPC Classifications: H01L

Claim:
1. A device comprising: a first active gate structure and a second active gate structure over an active area, the first active gate structure and the second active gate structure extending beyond a perimeter of the active area, wherein no additional active structures are interposed between the first active gate structure and the second active gate structure, wherein the first active gate structure is spaced apart from an edge of the active area, and wherein the first active gate structure is a nearest active gate structure to the edge of the active area; and a plurality of dummy gate structures over the active area, a first subset of the plurality of dummy gate structures being interposed between the first active gate structure and the second active gate structure, a second subset of the plurality of dummy gate structures being interposed between the edge of the active area and the first active gate structure, a number of dummy gate structures in the first subset of the plurality of dummy gate structures being greater than a number of dummy gate structures in the second subset of the plurality of dummy gate structures, the plurality of dummy gate structures being completely within the perimeter of the active area in a plan view.