Patent ID: 8790979
Filing Date: 2014-07-29
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising: forming a fin in an upper surface of a semiconductor substrate to extend in a first direction; forming a mask film to cover the fin; making a plurality of first trenches in the mask film to extend in a second direction intersecting the first direction to reach the fin; filling sidewall members into the first trenches, the sidewall members being insulative; making a second trench by removing the mask film from a portion of a space between the sidewall members; forming a gate insulating film on a surface of a first portion of the fin disposed inside the second trench; forming a gate electrode on the gate insulating film inside the second trench to extend in the second direction to straddle the first portion; making a third trench by removing the mask film from the remaining space between the sidewall members; and causing a second portion of the fin disposed inside the third trench to become a conductor.