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Z-axis Contact Detection Algorithm for a Wire Bonder using a Discrete Kalman Filter  

Kim, Jung-Han (School of Mechanical Design and Automation Engineering, Seoul National University of Technology)
Publication Information
International Journal of Precision Engineering and Manufacturing / v.8, no.1, 2007 , pp. 52-58 More about this Journal
Abstract
We propose a new contact detection algorithm for fine pitch wire bonding. Fast and stable contact detection of the z-axis in wire bonding is extremely important to maintain the quality of fine pitch gold wire bonding processes, which use a small pad less than $70{\mu}m$ in diameter. A small perturbation in the contact detection time causes a large difference in the size of the formed squashed ball. The new detection method is based on a statistical approach and designed for a discrete Kalman filter. It is faster and has smaller detection time variations than conventional detection methods. Experimental results are presented to demonstrate the advantages of the proposed algorithm.
Keywords
Detection algorithm; Stochastic parameters; Kalman filter; Filtering problem;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 1  (Related Records In Web of Science)
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