Patent ID: 8105926

Claim:
A method for producing a semiconductor device, comprising: a step (a) of forming on a supporting substrate a first semiconductor region having an upper surface and a side surface; and a step (b) of implanting the first semiconductor region with an impurity of a first conductivity type by a plasma doping method to thereby form a first impurity region in an upper portion of the first semiconductor region and a second impurity region in a side portion of the first semiconductor region, wherein in the step (b), a plasma doping method is carried out under a first condition such that an implantation dose is equal to a first dose, and then a plasma doping method is carried out under a second condition such that the implantation dose is equal to a second dose smaller than the first dose, said method further comprising, before the step (b), a step of implanting a semiconductor region which is similar to the first semiconductor region and is provided in each of a plurality of dummy substrates with the impurity by a plasma doping method under various conditions, so as to identify, as the first condition, a condition under which a sheet resistance of an impurity region formed in a side portion of the semiconductor region takes an intended value, and so as to identify, as the second condition, a condition under which a sheet resistance of an impurity region formed in an upper portion of the semiconductor region takes an intended value.