Patent Number: 7,102,161

Title: Switching element, display device using the switching element, and light emitting device

Abstract: A switching element is provided, which is capable of short-circuiting or opening three or more nodes simultaneously, and in which the surface area occupied on a substrate can be reduced. The switching element of the present invention has an active layer, an insulating film contacting the active layer, a gate electrode contacting the insulating film, and three or more connection electrodes. The active layer has at least one channel forming region and three or more impurity doped regions, and the connection electrodes are each connected to a different impurity region. An impurity region contacting an arbitrary connection electrode contacts only one of the channel forming regions.

Inventors: Inukai; Kazutaka (Kanagawa, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

International Classification: H01L 29/04 (20060101)

Expiration Date: 9/05/02018