Patent ID: 8679986
Filing Date: 2014-03-25
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps of: forming a first conductive film over a substrate; forming a first insulating film over the first conductive film; forming a semiconductor film over the first insulating film; forming a second conductive film over the semiconductor film; forming a mask film over the second conductive film; forming a first resist mask over the mask film; forming a first mask layer by performing dry etching or wet etching on the mask film with the first resist mask; removing the first resist mask using a resist stripper; forming a thin film stack body by performing dry etching on the first insulating film, the semiconductor film, and the second conductive film with the first mask layer, so that at least a surface of the first conductive film is exposed; forming a second insulating film over the first mask layer and the thin film stack body; etching the second insulating film to form a sidewall insulating layer covering a side surface of the thin film stack body; forming a first electrode layer by performing wet etching or dry etching on a side portion of the first conductive film with the first mask layer and the sidewall insulating layer after etching the second insulating film; forming a second resist mask over the first mask layer after forming the first electrode layer; forming a second mask layer by performing dry etching or wet etching on the first mask layer with the second resist mask after forming the second resist mask; removing the second resist mask using a resist stripper after forming the second mask layer; and forming a second electrode layer and a semiconductor layer by performing dry etching on an upper portion of the thin film stack body with the second mask layer and the sidewall insulating layer after removing the second resist mask.