Nano-Displacement Sensing and Estimation (nDSE): Enabling Technology for Nano Metrology and Fabrication

Author:

Gao Jun1,Picciotto Carl1

Affiliation:

1. Hewlett Packard Company

Abstract

In this paper, we will present theory for nDSE (nano-scale Displacement Sensing and Estimation) and its application framework: IDMA (Indirect Displacement-Measurement-based Alignment). nDSE presents a clear and novel theoretical explanation to displacement sensing and estimation, especially down to the nano scale, a precision traditionally thought difficult or impossible to achieve because the displacements are below the wavelength of light and smaller than the pixel dimensions of practical observation systems. IDMA is an enabling framework based on nDSE to provide a new, low-cost, high precision overlay alignment for the challenging issue of nano scale alignment and metrology.

Publisher

Trans Tech Publications, Ltd.

Subject

Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics

Reference5 articles.

1. J. Gao, C. Picciotto, and W. Jackson: Displacement sensing and estimation theory and application, Applied Physics A, Materials Science & Processing, Vol. A80, No. 6, page 1265-1278, March (2005).

2. C. Picciotto, J. Gao, E. Hoarau and W. Wu: Image displacement sensing (NDSE) for achieving overlay alignment, Applied Physics A, Materials Science & Processing, Vol. A80, No. 6, page 1287-1299, March (2005).

3. R. Beausoleil and R. Allen: Navigation system for handheld scanner, US Patent No. 6, 195, 475 201.

4. C. Picciotto, J. Gao and R. Beausoleil: Compensation for motion blur in system using optical navigation while accelerating, US Patent Application, Docket #200311092 (Pending), June (2004).

5. C. Picciotto, J. Gao: Displacement Estimation System and Method, US Patent Application, Docket #200403527 (Pending), August (2004).

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