Paper
12 February 1997 Measuring critical dimensions and overlays as prescribed by the National Technology Roadmap for Semiconductors
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Abstract
Continued demands on shrinking features with tighter tolerance on critical dimensions (CDs) and overlays (OL) are placing stringent requirements on parameters that are essentially the building blocks of the metrologies for CDs and overlays. This paper conducts a reality check on the precision and error budgets assigned to CD and overlay controls by the National Technology Roadmap for Semiconductors (NTRS) in light of constraints on parameters that are fundamental to the above measurements.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Syed A. Rizvi "Measuring critical dimensions and overlays as prescribed by the National Technology Roadmap for Semiconductors", Proc. SPIE 3236, 17th Annual BACUS Symposium on Photomask Technology and Management, (12 February 1997); https://doi.org/10.1117/12.284025
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KEYWORDS
Overlay metrology

Metrology

Critical dimension metrology

Precision measurement

Cadmium

Cesium

Chromium

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