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Proceedings Paper

A Positive Photoresist Optimized For Both I-Line And UV-3 Exposure
Author(s): John T. Grunwald; William F. Cordes III; Keith D. San Giacomo; Joseph Ben-Bassat; Eitan Shalom; Giora Ben-Shushan
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Paper Abstract

Data is presented on a positive photoresist designated as PR-1024 Megabit (MB), whose chemistry includes a cresol novolak, coupled with 2-1-4 diazonapthoquinone chloride. The type and M.W. of the coupled novolak were found to be of prime importance. UV absorption of the photoactive compound in the resist is in the range of 230 to 380 nm, with prominent peaks at 230, 270 and 370nm. Extensive SEM data is presented showing geometries obtained on the Micralign 600-552HT in the UV-3 mode. Micron capabilities are demonstrated with edge wall profiles of approximately 85°. A salient feature of the resist is its availability both in the ECA solvent mode (PR-1024MB) as well as "safe solvent" variety (EPA-1024MB). Exposure energies in the UV-3 mode were studied, ranging from 170 to 270 mJ/cm2. Linewidth control of both isolated/group lines is reported at various exposure energies, indicating wide process latitude. Used as an I-Line photoresist, sub-micron capabilities (0.5 micron) were demonstrated with edge acuities in the 80°-85° range. Wide process latitude is demonstrated with both types of exposure tools. Using I-Line steppeis and projection aligners, exposure energies were varied up to and including the 270 mJ/cm2 region. Dry processing (plasma etching) data will also be displayed.

Paper Details

Date Published: 9 July 1986
PDF: 6 pages
Proc. SPIE 0631, Advances in Resist Technology and Processing III, (9 July 1986);
Show Author Affiliations
John T. Grunwald, MacDermid Incorporated (United States)
William F. Cordes III, MacDermid Incorporated (United States)
Keith D. San Giacomo, MacDermid Incorporated (United States)
Joseph Ben-Bassat, MacDermid Incorporated (United States)
Eitan Shalom, MacDermid Incorporated (United States)
Giora Ben-Shushan, MacDermid Incorporated (United States)

Published in SPIE Proceedings Vol. 0631:
Advances in Resist Technology and Processing III
C. Grant Willson, Editor(s)

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