The study of chip orientation technology based on vision

Yuchan Xie; Zhonghai He

doi:10.1117/12.917783

15 November 2011 The study of chip orientation technology based on vision

Yuchan Xie, Zhonghai He

Proceedings Volume 8335, 2012 International Workshop on Image Processing and Optical Engineering; 833518 (2011) https://doi.org/10.1117/12.917783
Event: 2012 International Workshop on Image Processing and Optical Engineering, 2012, Harbin, China

Abstract

A chip visual localization method based on vision for IC packaging equipment was developed to satisfy the high precision requirement in the chip inspection in this paper. The method is based on the combination of Hough transform and prior geometric knowledge of chip. First, a straight line was extracted to match chip image.Then the conversion function of the chip image was deduced based on the straight line endpoint coordinates. Because the relative position coordinates of chip corner are known, the other two endpoints of chip in image can be deduced with substituting the known model coners coordinates into the matching conversion function. Finally, the chip orientation is achieved by linking the corners coordinates. Experimental results have shown that the the chip can be orientated accurately using this method.

Citation Download Citation

Yuchan Xie and Zhonghai He "The study of chip orientation technology based on vision", Proc. SPIE 8335, 2012 International Workshop on Image Processing and Optical Engineering, 833518 (15 November 2011); https://doi.org/10.1117/12.917783

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