| 摘要 |
A wafer chuck comprises a wafer chucking surface, a fixable rotary which allows the wafer chucking surface to rotate to adjust and fix pitch, and a planar joint which allows the wafer chucking surface to translate and fix position in order to center the wafer chucking surface with respect to another surface. An inventive assembly comprises a wafer chucking surface, and a wafer exchange surface, opposite the wafer chucking surface. The wafer exchange surface is mounted via a fixable rotary joint and a planar joint and allows the wafer exchange surface to rotate and to translate so as to fix the pitch and position of the wafer exchange surface to level and center the wafer exchange surface relative to the wafer chucking surface. Alternatively the fixable rotary and/or planar joints may be coupled to the wafer chucking surface. A calibration jig having rough and fine centering pins may be included.
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