Geometrical instruments – Gauge – With calibration device or gauge for nuclear reactor element
Reexamination Certificate
2010-01-20
2010-11-02
Guadalupe-McCall, Yaritza (Department: 2841)
Geometrical instruments
Gauge
With calibration device or gauge for nuclear reactor element
C033S503000
Reexamination Certificate
active
07823295
ABSTRACT:
A method is disclosed which is suitable for the calibration of a measuring table (20) of a coordinate measuring machine (1). For this purpose, a mask (2) is deposited in a three-point support of the measuring table (20), wherein the mask (2) used for the calibration of the measuring table (20) is a mask (2), which is used for the semiconductor production. The measurement of positions of a plurality of different structures (3) which are arranged in a distributed manner on the mask (2) is carried out. The structures (3) are available in an initial orientation on the mask (2). The mask (2) is rotated and the position of the structures (3) is determined in the rotated orientation. Afterwards, the mask (2) is shifted and the position of the structures (3) is also determined. A total correction function for eliminating coordinate-dependant measuring errors is determined, wherein the total correction function has a first correction function and a second correction function.
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Guadalupe-McCall Yaritza
Houston Eliseeva LLP
Vistec Semiconductor Systems GmbH
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