Patent ID: 9224745
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, the method comprising: forming a conductive film in a memory region and a logic region of a semiconductor substrate; forming a first gate electrode in the memory region by patterning the conductive film in the memory region while leaving the conductive film in the logic region; after forming the first gate electrode, forming a mask film above the conductive film left in the logic region, and above the first gate electrode; removing the mask film in the logic region; after removing the mask film in the logic region, forming a first resist film above the mask film left in the memory region, and above the conductive film left in the logic region; forming a second gate electrode in the logic region by etching the conductive film using the first resist film as a mask; removing the first resist film; and removing the mask film, wherein, in the forming the mask film, the mask film is formed on a lateral surface of the first gate electrode and a top surface of the first gate electrode, and, in the forming the second gate electrode in the logic region, the second gate electrode is formed in the logic region while leaving the mask film on the lateral surface of the first gate electrode and the top surface of the first gate electrode in the memory region.