Patent ID: 7727898

Claim:
A method for manufacturing an active matrix liquid crystal display device comprising: forming a thin film transistor over a substrate; forming a first insulating film comprising silicon nitride over the thin film transistor; forming a second insulating film comprising a resinous material over the first insulating film; forming a contact hole through the first insulating film and the second insulating film after forming the second insulating film; etching an entire surface of the second insulating film to widen the contact hole in the second insulating film and to expose an upper surface of the first insulating film around the contact hole after forming the contact hole; and forming a pixel electrode over the second insulating film after the etching step, wherein the pixel electrode is electrically connected to the thin film transistor through the contact hole and is in contact with the exposed upper surface of the first insulating film, and wherein the exposed upper surface of the first insulating film is generally parallel to an upper surface of the substrate.