Patent ID: 8823085

Claim:
A method for producing a semiconductor device, the method comprising: a first step of forming a fin-shaped silicon layer on a silicon substrate, forming a first insulating film around the fin-shaped silicon layer, and forming a pillar-shaped silicon layer in an upper portion of the fin-shaped silicon layer, the pillar-shaped silicon layer having a width equal to a width of the fin-shaped silicon layer; subsequent to the first step, a second step of forming a gate insulating film around the pillar-shaped silicon layer, forming a metal film and a polysilicon film around the gate insulating film, forming a third resist for forming a gate line, and performing anisotropic etching to form the gate line, the polysilicon film having a thickness smaller than the width of the pillar-shaped silicon layer; and subsequent to the second step, a third step of depositing a fourth resist, exposing the polysilicon film on a sidewall of an upper portion of the pillar-shaped silicon layer, removing the exposed polysilicon film by etching, removing the fourth resist, removing the metal film by etching, and forming a gate electrode connecting to the gate line.