Patent ID: 8492846
Filing Date: 2013-07-23
Classification: H01L

Abstract:
1. A semiconductor structure comprising: an active area comprising a semiconductor material and located in a semiconductor substrate; a first shallow trench isolation portion laterally abutting lengthwise sidewalls of a only middle portion of said active area; and a set of two second shallow trench isolation portions, each laterally abutting remaining lengthwise sidewalls of said active area as well as widthwise sidewalls of end portions of said active area, wherein said first shallow trench isolation portion and said set of two second shallow trench isolation portions comprise different materials, and wherein one of said set of two second shallow trench isolation portions is in direct contact with a first sidewall of said first shallow trench isolation portion and another of said set of two second shallow trench isolation portions is in direct contact with a second sidewall of said first shallow trench isolation portion, said second sidewall of said first shallow trench isolation portion is opposite of said first sidewall of said first shallow trench isolation portion.