Patent Number: 6,255,131

Title: Liquid crystal display device

Abstract: A method for forming a liquid crystal display device, which includes steps of forming a metal film over a substrate, patterning the metal film to form a first gate electrode and a first capacitor electrode as a part of a first capacity element, and forming a first insulating film over the metal film. The steps further include forming a first polycrystalline-silicon layer over the first insulating film, and patterning the first polycrystalline-silicon layer to form a second capacitor electrode as a part of the first capacity element and a second capacity element, while additionally including the steps forming a second insulating film over the polycrystalline-silicon layer, forming a second polycrystalline-silicon layer over the second insulating film, and patterning the second polycrystalline-silicon layer to form a second gate electrode and a third capacitor electrode as part of the second capacity element.

Inventors: Mori; Ikuko (Mobara, JP), Kaitoh; Takuo (Mobara, JP), Abe; Hironobu (Chiba, JP), Eto; Masahiro (Mobara, JP), Satoh; Toshihiro (Mobara, JP), Ishida; Kazuhiro (Mobara, JP), Kudoh; Hajime (Chiba, JP)

Assignee: Hitachi, Ltd.

International Classification: G02F 1/1362 (20060101); G02F 1/13 (20060101); H01L 21/02 (20060101); H01L 21/336 (20060101); H01L 29/66 (20060101); H01L 29/786 (20060101); H01L 021/00 ()

Expiration Date: 07/03/2018