Patent ID: 8846471
Filing Date: 2014-09-30
Classification: G11C,H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps, of: (a1) providing a semiconductor substrate; (b1) forming a first conductor film over a first region of a top surface of the semiconductor substrate via a first insulation film; (c1) processing the first conductor film, and forming a second conductor film and a third conductor film formed of the first conductor film, and apart from and adjacent to each other; (d1) sequentially forming a second insulation film, a charge accumulation film, and a fourth conductor film over the semiconductor substrate, and thereby filling between the second conductor film and the third conductor film adjacent to each other; (e1) removing the fourth conductor film immediately over the third conductor film; (f1) after the step (e1), removing the third conductor film; and (g1) forming source/drain regions in the top surface of the semiconductor substrate at the side of a structure formed of the second conductor film and the fourth conductor film at the sidewall thereof.