Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Reexamination Certificate
2005-03-22
2005-03-22
Zarneke, David (Department: 2829)
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
C324S758010
Reexamination Certificate
active
06870360
ABSTRACT:
An apparatus and method are provided for recognizing a working height of a device transfer system in a semiconductor device test handler which allows the working height of the device transfer system to be quickly measured and/or precisely reset. The device transfer system moves horizontally and vertically on a handler body of the semiconductor device test handler, and moves horizontally and vertically, and includes a plurality of pickers which pick up the semiconductor devices. An elevating block installed at one side of the device transfer system moves upward and downward, and a touch probe installed vertical relative to the elevating block moves upward and downward based on contact with a target object. A detector detects ascendance of the touch probe upon contact with the target object, and a working position is determined based on an initial position, a measured position, and a series of offset values.
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Fleshner & Kim LLP
Mirae Corporation
Nguyen Tung X.
Zarneke David
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