Patent ID: 8809177
Filing Date: 2014-08-19
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising: forming a tunnel insulating layer, a conductive film configured to be used as a floating gate, a dielectric film, a conductive film configured to be used as a control gate, and a sacrificial film on a semiconductor substrate; patterning the sacrificial film, the dielectric film, the conductive film configured to be used as a control gate, the dielectric film, and the conductive film configured to be used as a floating gate; forming an insulating layer in spaces between the patterned sacrificial film, the dielectric film, the conductive film configured to be used as a control gate, the dielectric film, and the conductive film configured to be used as a floating gate; removing the sacrificial film; forming a first barrier film on side walls of the insulating layer in the space from which the sacrificial film was removed; filling the spaces, from which the sacrificial film was removed, with a metal film to form a gate metal film; and forming a second barrier film on an upper portion of the gate metal film.