Patent Number: 6,166,397

Title: Display device with inverted type transistors in the peripheral and pixel portions

Abstract: A display device having high definition and high reliability, and technology for manufacturing the same. In an active matrix type display device of integrated peripheral driving circuit type, pixel TFTs of an active matrix circuit 100 are not provided with LDD regions. Also, among circuits constituting peripheral driving circuits 101, 102, buffer circuits, of which a high withstand voltage and high-speed operation are required, are made with thin film transistors having floating island regions and base regions between source and drain regions of their active layers.

Inventors: Yamazaki; Shunpei (Tokyo, JP), Zhang; Hongyong (Kanagawa, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

International Classification: H01L 21/70 (20060101); H01L 21/02 (20060101); H01L 29/49 (20060101); H01L 29/66 (20060101); H01L 21/20 (20060101); H01L 27/12 (20060101); H01L 29/40 (20060101); H01L 21/336 (20060101); H01L 29/786 (20060101); H01L 21/84 (20060101); H01L 029/00 ()

Expiration Date: 12/26/2017