Patent ID: 6864548

Claim:
A semiconductor device comprising: a plurality of first impurity introduced regions isolated from each other by an isolation insulating film and aligned in a predetermined direction; a second impurity introduced region extending in said predetermined direction and located at a distance away from said plurality of first impurity introduced regions; and a first control electrode extending in said predetermined direction between said plurality of first impurity introduced regions and said second impurity introduced region, wherein whether a first transistor is not, or is, formed is selected for each cell depending on whether said isolation insulating film is formed or a first semiconductor region is formed due to the absence of formation of said isolation insulating film between said first impurity introduced regions and said second impurity introduced region, a first protruding portion that protrudes towards one of said first impurity introduced regions is formed in said second impurity introduced region in a cell, in which said first transistor is not formed, from among a plurality of cells having said first impurity introduced regions, and said plurality of first impurity introduced regions are isolated for each cell by said isolation insulating film.