Patent ID: 8267388
Filing Date: 2012-09-18
Classification: H01L,Y10T

Abstract:
1. A method for aligning a sample on an alignment assembly that resides on a rotation stage, to an axis of rotation of the rotation stage, using an actuator to move the alignment assembly, the alignment assembly comprising two orthogonal linear slides and an external measurement device to measure a location of the sample, the method comprising: (a) rotating the rotation stage until a direction of movement of the alignment assembly is parallel to the movement of the actuator, (b) measuring the location of the sample, (c) successively rotating the rotation stage 90 degrees until the sample is as closest to the actuator as possible, (d) pushing the at least one of the linear slides with the actuator until the sample is the same distance from the actuator as the center of rotation, and (e) repeating steps (c) and (d).