Compact pinlifter assembly integrated in wafer chuck

Details Compact pinlifter assembly integrated in wafer chuck Compact pinlifter assembly integrated in wafer chuck

2006-05-16

2006-05-16

Banks, Derris H. (Department: 3722)

Chucks or sockets

Vacuum

C451S289000, C451S388000

Reexamination Certificate

active

07044476

ABSTRACT:
A compact pinlifter assembly is fitted in a substantially enclosed cavity within a wafer chuck such that an overall outside shape of the wafer chuck remains highly unaffected. The pinlifter assembly includes wedge guides providing a movement path in a wedge angle relative to the wafer holding face. A pin actuator is driven along the wedge guides transforming its movement along the wedge guides into a vertical movement of the lifting pins perpendicularly sliding between the cavity and the wafer holding face. The combination of wedge guides and pin actuator takes advantage of the relatively large lateral dimensions of the wafer chuck to move the pin actuator between end positions that are in a distance multiple of the pin lifters movement. Due to the wedge angle, the actuators comparatively large scale movement is transformed in a highly precise, smooth and balanced movement of the pin lifters.

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patent: 6485248 (2002-11-01), Taylor, Jr.

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