Patent ID: 8945962
Filing Date: 2015-02-03
Classification: H01L

Abstract:
1. A manufacturing method of a semiconductor device comprising the steps of: forming a first conductive film over a substrate; forming a second conductive film over the substrate; forming a first insulating film over the first conductive film and the second conductive film; forming a second insulating film over the first insulating film; forming a first opening and a recessed portion in the second insulating film by using a multi-tone photomask, wherein the first opening exposes a first part of an upper surface of the first insulating film; forming a second opening which exposes the second conductive film by etching the first part of the upper surface of the first insulating film; forming a third opening by widening the first opening, and a fourth opening by widening the recessed portion, wherein the fourth opening exposes a second part of the upper surface of the first insulating film over the first conductive film; and forming an electrode over the second insulating film, wherein the electrode is electrically connected to the second conductive film through the second opening and the third opening, and wherein the electrode overlaps with the first conductive film and is in contact with the second part of the upper surface of the first insulating film in the fourth opening.