Electro Scientific Industries, Inc.

Bruce W Ball

Brian C Johansen

Kyung Young Kim

Justin Redd

Steven E Kuznicki

Peter Jensen

Deepak Badoni

Jill Goldberg

Each data point within a two-dimensional code can be represented by a distribution of spots. Each spot can be made small enough to be invisible to the human eye so that the two-dimensional code can be invisible on or within transparent or nontransparent materials. The spots can be spaced at a large distance to increase the signal-to-noise ratio for an optical code reader. A code reader can be adapted to read the spots and determine the data points.

Optical mark reader

The present invention provides a method for automatically defining a part model for a semiconductor component. An image of the component is provided. The automatic method may be any of a trial and error method, systematic method or a method based on distance-angle signatures. The trial and error method is described in the context of defining a part model for a ball grid array. The systematic approach is described in the context of a leaded semiconductor, and the distance angle signature approach is described in the context of defining a part model for an odd form semiconductor component.

Method for automatically defining a part model for semiconductor components

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Ann Arbor, MI, United States of America

Bruce W Ball