Development of high-definition aqueous polyvinylpyrrolidone photoresists for cathode ray tubes

Authors

  • Jason Swei,

    Corresponding author
    1. Chemical Engineering Program, University of California, San Diego, La Jolla, California 92093-0411
    • Chemical Engineering Program, University of California, San Diego, La Jolla, California 92093-0411
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  • Jan B. Talbot

    Corresponding author
    1. Chemical Engineering Program, University of California, San Diego, La Jolla, California 92093-0411
    • Chemical Engineering Program, University of California, San Diego, La Jolla, California 92093-0411
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Abstract

Aqueous photoresists that are capable of higher resolutions than are currently employed by the cathode ray tube (CRT) industry were developed by combining photoactivators, which activate at shorter UV wavelengths with polyvinylpyrrolidone (PVP). Two photoactivators were synthesized: 4,4′-diazido-2,2′-biphenyl disodium disulfonate (DABP), which has a maximum absorbance at 264 nm, and 4,4′-diazido-2,2′-biphenylethane disodium disulfonate (DABPE), which has a maximum absorbance at 258 nm. The PVP/DABP and PVP/DABPE photoresists successfully imaged a pattern with resolution as small as 4.4 μm with photoactivator concentrations greater than 20% of the PVP concentration. Addition of silane and emulgen greatly improved the performance of the photoresists with more uniform coatings of thicknesses of up to 1.4 μm. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1637–1644, 2006

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