Patent ID: 8633487

Claim:
A transistor structure comprising: a first thin film transistor including: a first gate electrode; a first insulating film which covers the first gate electrode; a first semiconductor film which is provided in a position on the first insulating film corresponding to the first gate electrode; a second insulating film which covers the first semiconductor film; and a first light blocking film which is provided in a position on the second insulating film corresponding to the first semiconductor film, and a second thin film transistor including: a second semiconductor film which is provided on the first insulating film; the second insulating film which covers the second semiconductor film; a second gate electrode which is provided in a position on the second insulating film corresponding to the second semiconductor film; and a second light blocking film which is provided in a position below the first insulating film corresponding to the second semiconductor film, wherein: the first semiconductor film and the second semiconductor film include a first region and a second region along a thickness direction from a side of the first insulating film, and a degree of crystallization of silicon of one of the first region and the second region is higher than a degree of crystallization of silicon of the other of the first region and the second region; in the first thin film transistor, the first region in the first semiconductor film constitutes an electric current path of the first semiconductor film; and in the second thin film transistor, the second region in the second semiconductor film constitutes an electric current path of the second semiconductor film.