Patent ID: 6673674
Filing Date: 2004-01-06
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising:the first step of forming a gate insulating film on a semiconductor substrate of a first conductivity type; the second step of forming a lower electrode on said gate insulating film; the third step of doping an impurity of a second conductivity type to a surface of said semiconductor substrate on two side regions of said lower electrode and said gate insulating film, thereby forming a source and a drain; the fourth step of forming a protection film on said lower electrode; the fifth step of forming a silicide layer on said source and drain without forming the silicide layer on the lower electrode; the sixth step of removing said protection film and thereafter forming an upper electrode having a T-shaped section to come into contact with an exposed upper surface of said lower electrode, thereby forming a floating gate comprising said lower and upper electrodes; the seventh step of forming an isolation insulating film to cover said upper electrode; and the eighth step of forming a control gate on said floating gate through said isolation insulating film.