Patent ID: 7541228
Filing Date: 2009-06-02
Classification: H01L

Abstract:
1. A method of designing a semiconductor device with a plurality of cells, the cells each including a plurality of TFTs that have the same channel length direction, the cells being arranged to form columns along the channel length direction, wherein the plural TFTs of the cells each have an island-like semiconductor film and the island-like semiconductor film is placed on a depressive portion of a base film that has a rectangular or stripe pattern concave and convex with the channel length direction matching the longitudinal direction of the depressive portion, and wherein every cell in the same column out of the plural columns has a width in the direction perpendicular to the channel length direction that is smaller than a width of a laser light for crystallizing the island-like semiconductor film of each of the plural TFTs in the direction perpendicular to the channel length direction.