Method of manufacturing semiconductor device

• Main Author: FUKUMURA TATSUYA
• Format: Patent
• Language: Chinese; English
• Published: 25.09.2013
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

Provided is a method of manufacturing a semiconductor device which allows an operation of the semiconductor device to be stabilized without increasing the area occupied thereby. The control gate electrode of a memory cell transistor is formed, and then the memory gate electrode thereof is formed on a lateral side of the control gate electrode. Then, memory offset spacers are formed over the side walls of the memory gate electrode. Then, the memory source region of the memory cell transistor is formed by ion implantation using the memory gate electrode, the memory offset spacers, and the like as a mask. Then, the memory drain region of the memory cell transistor is formed by ion implantation. Then, in the memory cell transistor, sidewall insulating films are formed. The memory offset spacers disappear through cleaning or the like before the sidewall insulating films are formed.