Patent ID: 8384084
Filing Date: 2013-02-26
Classification: G02F,H01L,Y10S

Abstract:
1. A semiconductor device comprising a first thin film transistor, a second thin film transistor, an insulating film, and an image sensor, wherein the first thin film transistor comprises: wherein the insulating film is formed over and in contact with the first source electrode and the first drain electrode, wherein the second thin film transistor is over the insulating film and comprises: wherein the image sensor comprises a photoelectric conversion layer and a transparent conductive film, wherein the photoelectric conversion layer is over at least one of the second source electrode and the second drain electrode, wherein at least one of the first and second semiconductor films is a crystalline silicon film, wherein when the at least one of the first and second semiconductor films is observed during electron beam diffraction analysis, an electron beam diffraction pattern is observable that includes first and second diffraction spots, each of the first and second diffraction spots in the electron beam diffraction pattern being substantially circular, and wherein a ratio of a minor-axis length to a major-axis length of each of the first and second diffraction spots is in a range of 1/1 to 1/1.5.