Patent ID: 7821005
Filing Date: 2010-10-26
Classification: H01L,Y10S

Abstract:
1. A semiconductor device comprising: a crystalline semiconductor film over a substrate; a gate insulating film adjacent to the crystalline semiconductor film; and a gate electrode adjacent to the gate insulating film, wherein the crystalline semiconductor film comprises a channel forming region, a pair of first impurity regions including a one conductivity type impurity element adjacent to the channel forming region, and a pair of second impurity regions including the one conductivity type impurity element and sandwiching the channel forming region, and the pair of first impurity regions, wherein the pair of second impurity regions are located on end portions of the crystalline semiconductor film, respectively, wherein, in the crystalline semiconductor film, a noble gas element is only included in the second impurity regions, and wherein an outer side surface of each of the second impurity regions is in contact with the gate insulating film.