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Proceedings Paper

Forbidden pitch or duty-free: revealing the causes of across-pitch imaging differences
Author(s): Bruce W. Smith
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Paper Abstract

As resist image responses vary with duty ratio, the identification of a particularly challenging instance leads to its classification as a “forbidden pitch.” The increased application of various RET methods has often resulted in the misuse of this label for anything unexplained by linear effects. This paper attempts to dispel the myths regarding the imaging variations that occur with pitch. Furthermore, by describing the basis of these behaviors, insight is provided for the appropriate design of mask, illumination, OPC, and exposure parameters to best accommodate a broad range of duty ratio values.

Paper Details

Date Published: 26 June 2003
PDF: 9 pages
Proc. SPIE 5040, Optical Microlithography XVI, (26 June 2003); doi: 10.1117/12.485490
Show Author Affiliations
Bruce W. Smith, Rochester Institute of Technology (United States)

Published in SPIE Proceedings Vol. 5040:
Optical Microlithography XVI
Anthony Yen, Editor(s)

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