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Proceedings Paper

Second-level imaging of advanced alternating phase-shift masks using e-beam lithography
Author(s): Bernd Leibold; Joerg Butschke; Lutz Bettin; Dirk Beyer; Mathias Irmscher; Corinna Koepernik; Rainer Plontke; Armelle Vix; Peter Voehringer
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Paper Abstract

When e-beam lithography is applied for second level imaging of Alternating Phase Shift Masks charging effects on the cleared chrome absorber induces placement, overlay and pattern distortion of the second layer. The water soluble conductive to coat Showa Denko ESPACER 300Z has been evaluated in combination with the chemically amplified resist FEP171 for a charging eliminating patterning solution. Application of ESPACER on top of FEP171 kept the resist performance unchanged. Sensitivity, profile, resolution, CD-uniformity and post exposure delay of FEP171 have been investigated and no influence of ESPACER was detected. The bilayer system ESPACER and FEP171 was used for the second patterning of an altPSM test design and the technology performance was characterized. No difference has been figured out between placement of the second level and placement on a non-structured chrome layer. The achieved overlay accuracy proves the ESPACER/FEP171 combination as a promising approach for future altPSM manufacturing.

Paper Details

Date Published: 17 December 2003
PDF: 11 pages
Proc. SPIE 5256, 23rd Annual BACUS Symposium on Photomask Technology, (17 December 2003); doi: 10.1117/12.518037
Show Author Affiliations
Bernd Leibold, Institut fur Mikroelektronik Stuttgart (Germany)
Joerg Butschke, Institut fur Mikroelektronik Stuttgart (Germany)
Lutz Bettin, Leica Microsystems Lithography (Germany)
Dirk Beyer, Leica Microsystems Lithography (Germany)
Mathias Irmscher, Institut für Mikroelektronik Stuttgart (Germany)
Corinna Koepernik, Institut für Mikroelektronik Stuttgart (Germany)
Rainer Plontke, Leica Microsystems Lithography (Germany)
Armelle Vix, Infineon Technologies AG (Germany)
Peter Voehringer, Institut für Mikroelektronik Stuttgart (Germany)

Published in SPIE Proceedings Vol. 5256:
23rd Annual BACUS Symposium on Photomask Technology
Kurt R. Kimmel; Wolfgang Staud, Editor(s)

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