Patent ID: 8252651

Claim:
A method of manufacturing a semiconductor device having a FIN-type transistor including a FIN-shape semiconductor portion, comprising the steps of: (a) forming a FIN-shape semiconductor portion having an upper surface, one lateral side, and another lateral side extending along a first direction and forming a pad insulating film over the upper surface of the FIN-shape semiconductor portion; (b) forming a gate insulating film on the one lateral side and the other lateral side of the FIN-shape semiconductor portion; (c) forming a gate electrode extending in a second direction perpendicular to the first direction by way of the pad insulating film and the gate insulating film while overriding a portion of the FIN-shape semiconductor portion; (d) using a cluster containing ten or more impurity atoms as a starting gas which is evaporated in an oven, ionized, and implanted to the one lateral side of the FIN-shape semiconductor portion having the pad insulating film at the upper surface and not formed with the gate electrode, from a direction at a first implantation angle relative to a normal line vertical to the upper surface of the FIN-shape semiconductor portion; (e) using a cluster containing ten or more impurity atoms as a starting gas which is evaporated in an oven, ionized, and implanted to the other lateral side of the FIN-shape semiconductor having the pad insulating film on the upper surface and not formed with the gate electrode, from a direction at a second implantation angle relative to the normal line vertical to the upper surface of the FIN-shape semiconductor portion; and (f) activating the cluster ions implanted to the FIN-shape semiconductor portion to form a diffusion region that forms a portion of a source region and a drain region to the FIN-shape semiconductor portion on both sides of the gate electrode.