Patent ID: 8835241
Filing Date: 2014-09-16
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a first interlayer insulating film; forming a lower-layer wire on the first interlayer insulating film; forming a storage layer and a conductive layer on the lower-layer wire; processing the conductive layer, the storage layer, and the lower-layer wire down to the first interlayer insulating film to form a trench; burying and forming a second interlayer insulating film in the trench; first etching back the second interlayer insulating film by a CMP method using the conductive layer as a stopper; second etching back a top surface of the second interlayer insulating film by a different process than the CMP method of the first etching back, to be lower than a top surface of the conductive layer; and forming an upper-layer wire on the second interlayer insulating film and on the conductive layer.