Patent ID: 7776681

Claim:
A method for manufacturing a semiconductor device, comprising the steps of: forming a semiconductor film; 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 so as to cover the second semiconductor film and the second gate electrode after removing the first resist mask, the second resist mask, and the third 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 forth resist mask, wherein the p-type impurity ions are generated from diborane gas diluted with hydrogen gas, and the n-type impurity ions are generated from phosphine gas diluted with hydrogen gas or arsine gas diluted with hydrogen gas.