Patent ID: 7812325

Claim:
A method for implanting a wafer, comprising: providing an apparatus for holding a wafer, wherein the apparatus can rotate the wafer and tilt the wafer about a first orthogonal axis and a second orthogonal axis; tilting the wafer to a first angle about the first orthogonal axis; implanting the wafer at a plurality of different rotational positions; tilting the wafer to a second angle about the first orthogonal axis; implanting the wafer at the plurality of different rotational positions; tilting the wafer to a third angle about the second orthogonal axis; implanting the wafer at the plurality of different rotational positions; tilting the wafer to a fourth angle about the second orthogonal axis; implanting the wafer at the plurality of different rotational positions; and wherein the tilting to the first angle, the second angle, the third angle, and the fourth angle and the implanting at the plurality of different rotational positions are configured to uniformly implant the wafer and wherein the second angle is a negative of the first angle and the fourth angle is a negative of the third angle.