Method for recognizing working position of a device transfer apparatus in semiconductor test handler
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United States of America Patent
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Sep 9, 2008
Grant Date -
Jun 19, 2003
app pub date -
Dec 10, 2002
filing date -
Dec 17, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for recognizing working position in a semiconductor test handler is disclosed. The method includes the steps of: (a) obtaining necessary information through image input unit while moving device transfer unit to upper portion of tray and in horizontal and vertical directions; (b) obtaining image information of identifiers attached to respective change kits through the image input unit while moving the device transfer unit to the respective change kits and moving the device transfer unit in one direction, and simultaneously obtaining origin of the change kit; (c) comparing kinds of semiconductor devices inputted into control unit of the handler with information of the identifiers which are obtained in the step of (b), and determining whether or not the kinds of the semiconductor devices accords with those of the change kits; and (d) calculating the working position of the device transfer unit using the image information obtained through the steps a) to c) in the image processor and the control unit.
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