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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 5 — Feb. 1, 2002
  • pp: 895–901

Model of linewidth for laser writing on a photoresist

José Ramón Salgueiro, Vicente Moreno, and Jesús Liñares  »View Author Affiliations


Applied Optics, Vol. 41, Issue 5, pp. 895-901 (2002)
http://dx.doi.org/10.1364/AO.41.000895


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Abstract

We present a theoretical model to describe the feature size produced by direct laser writing upon a photoresist relative to various experimental parameters. The model allows the number of parameters required for describing the linewidth to be reduced and shows how the description can be made in terms of the ratio of laser power to writing velocity. Both of the limiting cases of the truncation of the laser beam are analyzed; i.e., the case of a nontruncated (Gaussian) beam and the case of a strongly truncated beam (simplified with uniform illumination assumed). Experimental measurements are presented that are fitted to the model to permit its validity to be assessed and for a comparison of these two regimes, which are shown to be different.

© 2002 Optical Society of America

OCIS Codes
(110.5220) Imaging systems : Photolithography
(350.3390) Other areas of optics : Laser materials processing

History
Original Manuscript: March 14, 2001
Revised Manuscript: September 27, 2001
Published: February 10, 2002

Citation
José Ramón Salgueiro, Vicente Moreno, and Jesús Liñares, "Model of linewidth for laser writing on a photoresist," Appl. Opt. 41, 895-901 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-5-895

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