Patent ID: 7662679
Filing Date: 2010-02-16
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device comprising: forming a mask layer on a first-conductivity-type semiconductor substrate; etching the semiconductor substrate using the mask layer as a mask, thereby forming a projecting semiconductor layer; forming a first insulating layer on the semiconductor substrate to cover a lower portion of the projecting semiconductor layer; doping a first-conductivity-type impurity into the first insulating layer, with a mask member covering an entire top surface of the projecting semiconductor layer; moving the impurity doped into the first insulating layer into the lower portion of the projecting semiconductor layer, thereby forming a high-impurity-concentration layer in the lower portion of the projecting semiconductor layer; forming gate insulating films on side surfaces of the projecting semiconductor layer which upwardly extend from an upper surface of the first insulating layer; and forming a gate electrode on the gate insulating films and on the first insulating film.