Patent ID: 7928438
Filing Date: 2011-04-19
Classification: G02F,H01L,Y10S

Abstract:
1. A semiconductor device comprising: a first thin film transistor comprising a first semiconductor film over an insulating surface; an insulating film over the first thin film transistor; a second semiconductor circuit comprising a second semiconductor film over the insulating film; a wiring electrically connected to the second semiconductor circuit; a photoelectric conversion layer on the wiring; and an electrode on the photoelectric conversion layer, wherein at least one of the first and second semiconductor films is a crystalline silicon film, wherein each of diffraction spots of an electron beam diffraction pattern of the one of the first and second semiconductor films is substantially circular, and wherein a ratio of a minor-axis length to a major-axis length of each of the diffraction spots is in a range of 1/1 to 1/1.5.