Patent ID: 9293599
Filing Date: 2016-03-22
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: an island-shaped stack over a substrate, the island-shaped stack including a base insulating film and an oxide semiconductor film over the base insulating film; a protective insulating film over the substrate, wherein a side surface of the protective insulating film faces a side surface of the island-shaped stack; a first conductive film and a second conductive film over and in contact with the island-shaped stack, the first conductive film and the second conductive film being apart from each other; an insulating film over the island-shaped stack, the first conductive film, and the second conductive film; and a third conductive film over the insulating film and overlapping with the island-shaped stack, wherein a top surface of the oxide semiconductor film is coplanar with a top surface of the protective insulating film.