Patent ID: 7807530
Filing Date: 2010-10-05
Classification: B82Y,G11C,H01L

Abstract:
1. A manufacturing method of a semiconductor integrated circuit device comprising a nonvolatile memory cell transistor having a control gate electrode and a memory gate electrode, comprising steps of: (a) forming a first gate insulating film over a semiconductor substrate; (b) after the step (a), forming the control gate electrode over the first gate insulating film; (c) after the step (b), forming a second gate insulating film over the semiconductor substrate, side surface of the control gate electrode and top surface of the control gate electrode, wherein the second gate insulating includes a charge storage film; (d) after the step (c), depositing a conductive film over the second gate insulating film; (e) after the step (d), forming a mask layer in order to cover a part of the conductive film; (f) after the step (e), dry etching the conductive film by using the mask layer, thereby the conductive film not covered with the mask layer is processed to form a side spacer-like shaped said memory gate electrode on a side wall of the control gate electrode through the second gate insulating film and the conductive film covered with the mask layer is patterned to a contact region of the memory gate electrode; (g) after the step (f), removing the mask layer; (h) after the step (g), forming an interlayer insulating film over the control gate electrode and the memory gate electrode; (i) after the step (h), forming a hole in the interlayer insulating film in order to connect with the contact region of the memory gate electrode; and (j) after the step (i), forming a plug in the hole.