Patent ID: 9443817
Filing Date: 2016-09-13
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor device, comprising: forming a silicon nitride film above a surface of a semiconductor substrate; forming a first wiring above the silicon nitride film; forming a first insulating film over the first wiring; forming a second wiring containing aluminum over the first wiring via the first insulating film; forming a second insulating film over the second wiring; forming an opening that exposes a part of the second wiring by removing the second insulating film over the second wiring; and after the forming of the opening, forming aluminum nitride on a surface of the exposed second wiring, wherein the forming of the silicon nitride film comprises forming the silicon nitride film on a back surface of the semiconductor substrate, wherein the forming of the second wiring comprises forming the second wiring by etching a conductive film containing aluminum, and wherein the method further comprises: