Inspection stage having a plurality of Z axes
US6774621B2 · kind B2 · utility
2Cited by
7References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 14, 2003 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | May 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2887
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An inspection stage including a chuck top, a rectangular Z base, an X stage, a Y stage, and a Z axis elevating mechanism. The chuck top is used for mounting a wafer W. The Z base is provided with the chuck top and is vertically movable. The X stage elevatingly supports the Z base and is movable in an X direction. The Y stage movably supports the X stage in the X direction and is movable in a Y direction. The Z axis elevating mechanism is provided at each of the four corners of the Z base in such a manner as to surround the chuck top.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.