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Proceedings Paper

Yield enhancement based on defect reduction using on-the-fly automatic defect classification
Author(s): Manda Kulkarni; Andrew Skumanich
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Paper Abstract

Defect reduction for both process development and line monitoring requires not only capturing the defects, but also determining which are yield limiting, and then systematically eliminating these defects. A methodology has been successfully implemented at VLSI-Phillips providing for defect reduction and monitoring based on automatic defect classification. A wafer inspection tool (WF700 series) with 'on-the-fly' automatic defect classification (OTF-ADC) is utilized to capture and segregate defects of interest during the inspection with no loss in throughput. After determination of which defects have yield impact, the inspection is optimized to capture, classify, and track these defects with separate SPC limits. With the OTF-ADC segregation, the key defects of interest can be separately monitored for excursions. If an excursion is manifest, the corrective action can then be immediately implemented. Various cases are discussed including missing vias, metal bridging, and metal sidewall defects. Yield loss analysis was used for defect prioritization.

Paper Details

Date Published: 2 June 2000
PDF: 8 pages
Proc. SPIE 3998, Metrology, Inspection, and Process Control for Microlithography XIV, (2 June 2000); doi: 10.1117/12.386525
Show Author Affiliations
Manda Kulkarni, VLSI Technology, Inc. (United States)
Andrew Skumanich, Applied Materials (United States)

Published in SPIE Proceedings Vol. 3998:
Metrology, Inspection, and Process Control for Microlithography XIV
Neal T. Sullivan, Editor(s)

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