ANATOMY OF AN APPLICATION AUTOMATIC …

ANATOMY OF ANAPPLICATION:AUTOMATICALIGNMENT IN West Automated Vision Systems, Table of Contents 1 Generic Alignment Procedure .. 1 Prealignment .. 1 History .. 2 Manual Methods .. 2 Mechanically Scanned Point 2 Binary Correlation .. 3 Projection .. 4 Current applications .. 7 Wafer 7 Film Thickness Measurement .. 10 Remaining 12 Conclusion .. 13 14 Glossary .. 15 1 Introduction AUTOMATIC alignment, used extensively in the semiconductor industry, includes both front end wafer fabrication and back end test, assembly, and packaging (TAP) processes. This white paper presents two such AUTOMATIC alignment APPLICATION case studies one from the back end test area, the other from the front end of the process and shows how each APPLICATION evolved, lessons learned along the way, and the resulting impact on today s best practices. Of course, AUTOMATIC alignment is not limited to the semiconductor industry, but is widespread throughout all manufacturing industries using AUTOMATIC assembly equipment.

1 Introduction Automatic alignment, used extensively in the semiconductor industry, includes both fifront endfl wafer fabrication and fiback endfl test, assembly, and packaging (TAP) processes.

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