Patent ID: 9082639
Filing Date: 2015-07-14
Classification: H01L,H04N

Abstract:
1. A manufacturing method of a semiconductor device including a first transistor and a second transistor in which a gate insulation film is thinner than a gate insulation film of the first transistor, the method comprising: forming a first member and a second member on a polysilicon film covering a semiconductor substrate; forming, by performing patterning on the polysilicon film using the first member as a mask, a gate electrode of the first transistor from a portion of the polysilicon film including impurity, and, by performing patterning on the polysilicon film using the second member as a mask, a gate electrode of the second transistor from a portion of the polysilicon film including impurity; forming, by implanting ions in the semiconductor substrate using the first member as a mask for the gate electrode of the first transistor, a drain of the first transistor; and forming, by implanting ions in the semiconductor substrate, a drain of the second transistor, with an ion implantation in the gate electrode of the second transistor after making the second member thinner than the first member by thinning the second member.