Patent ID: 7468305

Claim:
A method for forming a semiconductor structure, the method comprising: providing a semiconductor chip including active regions; forming gate structures in the active regions; forming N-LDD regions on the semiconductor chip using an N-LDD mask; forming N-Pocket regions on the semiconductor chip using an N-Pocket mask, wherein the N-Pocket regions are of p-type, and wherein the N-LDD mask and the N-Pocket mask are different masks; forming P-LDD regions on the semiconductor chip using a P-LDD mask; and forming P-Pocket regions on the semiconductor chip using a P-Pocket mask, wherein the P-Pocket regions are of n-type, wherein the P-LDD mask and the P-Pocket mask are different masks, and wherein the N-LDD mask, the N-Pocket mask, the P-LDD mask, and the P-Pocket mask are for defining patterns in lithography processes.