Patent ID: 8405090

Claim:
An active matrix display device comprising: a transistor including: an island-like single crystalline semiconductor layer comprising silicon wherein the island-like single crystalline semiconductor layer is formed on a first insulating layer comprising silicon oxide and a second insulating layer comprising silicon oxide over a glass substrate and has at least a channel formation region and source and drain regions; a gate insulating film formed on the island-like single crystalline semiconductor layer; and a gate electrode formed over the channel formation region with the gate insulating film interposed therebetween; an interlayer insulating film formed over the transistor; and a pixel electrode formed over the interlayer insulating film and electrically connected to one of the source and drain regions, wherein a bonded interface exists between the first insulating layer and the second insulating layer, and wherein the island-like single crystalline semiconductor layer is 20 to 100 nm thick.