Patent ID: 8211758

Claim:
A method of producing a semiconductor device, comprising the steps of: forming a planar semiconductor layer on a substrate and then forming a pillar-shaped first-conductive-type semiconductor layer in the planar semiconductor layer; forming a second-conductive-type semiconductor layer in a portion of the planar semiconductor layer underneath the pillar-shaped first-conductive-type semiconductor layer; forming a gate dielectric film in contact with the pillar-shaped first-conductive-type semiconductor layer and a gate electrode around the pillar-shaped first-conductive-type semiconductor layer and separated therefrom by the gate dielectric film; forming a sidewall-shaped dielectric film on an upper region of a sidewall of the pillar-shaped first-conductive-type semiconductor layer and in contact with a top of the gate electrode and a sidewall-shaped dielectric film on a sidewall of the gate electrode; forming a second-conductive-type semiconductor layer in an upper portion of the pillar-shaped first-conductive-type semiconductor layer; forming a metal-semiconductor compound on the second-conductive-type semiconductor layer formed in the portion of the planar semiconductor layer underneath the pillar-shaped first-conductive-type semiconductor layer; forming a metal-semiconductor compound on the second-conductive-type semiconductor layer formed in the upper portion of the pillar-shaped first-conductive-type semiconductor layer; forming a metal-semiconductor compound on the gate electrode; forming a contact on the second-conductive-type semiconductor layer formed in the portion of the planar semiconductor layer underneath the pillar-shaped first-conductive-type semiconductor layer; and forming a contact on the second-conductive-type semiconductor layer formed in the upper portion of the pillar-shaped first-conductive-type semiconductor layer.