Patent ID: 9368598
Filing Date: 2016-06-14
CPC Classification: H01L,Y10S

Claim Text:
1. A manufacturing method of a semiconductor device, comprising the steps of: (a) providing a semiconductor substrate; (b) forming a first gate electrode via a first gate insulating film and a second gate electrode via a second gate insulating film over the semiconductor substrate; (c) forming a first insulating film over the semiconductor substrate to cover the first gate electrode and the second gate electrode; (d) forming a first sidewall insulating film with a predetermined thickness selectively formed over a side surface of the first insulating film corresponding to a sidewall of the second gate electrode; (e) after the step (d), etching back the first sidewall insulating film and the first insulating film to thereby form a second sidewall insulating film with a first width made of the first insulating film, over a sidewall of the first gate electrode and a third sidewall insulating film with a second width made of the first insulating film, over a sidewall of the second gate electrode, wherein the first width is smaller than the second width.