Patent ID: 6617647
Filing Date: 2003-09-09
Classification: B82Y,H01L

Abstract:
A method of manufacturing a semiconductor device, said method comprising:forming a source region, a drain region and a channel forming region having a channel width and a channel length in a crystalline semiconductor film over a substrate; forming a plurality of impurity regions by adding impurity elements locally in said channel forming region, each of said impurity regions having a width smaller than the channel width; and forming a gate insulating film and a gate electrode over said channel forming region; wherein said impurity elements added to said impurity regions in said channel region shift an energy band width (Eg), wherein said impurity region are arranged in a matrix form in the channel forming regions in a channel width direction and in a channel length direction, and wherein each of said impurity regions has one conductivity opposite to that of the source and drain regions.