Patent ID: 7638372

Claim:
A method for manufacturing a semiconductor device, comprising the steps of: forming a semiconductor film over a substrate; forming a first semiconductor film and a second semiconductor film by processing the semiconductor film; forming a gate insulating film over the first semiconductor film and the second semiconductor film; forming a conductive film over the gate insulating film; forming a first resist mask and a second resist mask over the conductive film; forming a first gate electrode over the first semiconductor film with the gate insulating film interposed therebetween by processing the conductive film using the first resist mask, while forming a second gate electrode over the second semiconductor film with the gate insulating film interposed therebetween by processing the conductive film using the second resist mask; forming a third resist mask so as to cover the first semiconductor film, the first gate electrode, and the first resist mask; forming a first source region and a first drain region of the second semiconductor film by an ion shower method with p-type impurity ions using the second resist mask and the third resist mask; removing the first resist mask, the second resist mask, and the third resist mask after forming the first source region and the first drain region of the second semiconductor film; forming a fourth resist mask over the first gate electrode while forming a fifth resist mask over the second gate electrode after removing the first resist mask, the second resist mask, and the third resist mask; forming a sixth resist mask so as to cover the second semiconductor film, the second gate electrode, and the fifth resist mask; and forming a second source region and a second drain region of the first semiconductor film by an ion shower method with n-type impurity ions using the fifth resist mask and the sixth resist mask, wherein the p-type impurity ions are generated from diborane gas diluted with hydrogen gas, and wherein the n-type impurity ions are generated from phosphine gas diluted with hydrogen gas or arsine gas diluted with hydrogen gas.