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Proceedings Paper

Edge lithography as a means of extending the limits of optical and nonoptical lithographic resolution
Author(s): Steven J. Holmes; Toshiharu Furukawa; Mark C. Hakey; David V. Horak; Paul A. Rabidoux; K. Rex Chen; Wu-Song Huang; Mahmoud Khojasteh; Niranjan Patel
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Paper Abstract

Lithographic scaling entails continuously increasing resolution while at the same time improving the tolerance control on the printed images. Typically, this has been done by using shorter actinic wavelengths, increasing numerical aperture, compensating reticle patterns and similar methods that serve to enhance the fidelity of the aerial image. In some case, this scaling has been achieved by altering the method of image formation, such as with the use of alternating phase shift reticles, in which the width of the aerial image is established by phase interference rather than of a diffraction-limited process of passing light through a dark masking pattern. This paper describes development of a resist material that provides a new way to scale lithographic patterns, one similar to alternating phase shift lithography in the sense that it prints the edge of an aerial image rather than the entire image as a single pattern. Because the edge of the aerial image is of higher resolution, with smaller components of tolerance than the entire image, this type of resist may provide a new method of scaling.

Paper Details

Date Published: 11 June 1999
PDF: 10 pages
Proc. SPIE 3678, Advances in Resist Technology and Processing XVI, (11 June 1999); doi: 10.1117/12.350218
Show Author Affiliations
Steven J. Holmes, IBM Microelectronics Div. (United States)
Toshiharu Furukawa, IBM Microelectronics Div. (United States)
Mark C. Hakey, IBM Microelectronics Div. (United States)
David V. Horak, IBM Microelectronics Div. (United States)
Paul A. Rabidoux, IBM Microelectronics Div. (United States)
K. Rex Chen, IBM Microelectronics Div. (United States)
Wu-Song Huang, IBM Microelectronics Div. (United States)
Mahmoud Khojasteh, IBM Microelectronics Div. (United States)
Niranjan Patel, Intarsia Corp. (United States)

Published in SPIE Proceedings Vol. 3678:
Advances in Resist Technology and Processing XVI
Will Conley, Editor(s)

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