Aromatizing unzipping polyester for EUV photoresist

Kensuke Matsuzawa, Ryan Mesch, Michael Olah, Wade Wang, Scott T. Phillips, C. Grant Willson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


New "self-immolating" or "unzipping" polymers, materials that depolymerize in response to irradiation, were designed and prepared successfully. We studied several candidate polymers and ultimately chose two of them for further development. One is a polyester that aromatizes upon depolymerization. The unzipping reaction initiated by UV exposure in solution was confirmed. The polymer was then studied in thin films to assess its potential for use in formulating photoresists. The neat polymer was tested as a blend with novolac resin. The effect of unzipping polyester loading in novolac on the rate of dissolution of films in TMAH was studied. Inhibition occurs at 20-30% loading. The films were exposed with DUV light and patterning was observed. The sensitivity of the unzipping polyester formulation is low in part due to the low absorption of the polymer for UV light. However, the polymer showed higher sensitivity with EUV exposure and first contrast curves show sensitivity in the range of 20-25mJ/cm2.

Original languageEnglish (US)
Title of host publicationAdvances in Patterning Materials and Processes XXXII
EditorsThomas I. Wallow, Christoph K. Hohle
ISBN (Electronic)9781628415278
StatePublished - 2015
EventAdvances in Patterning Materials and Processes XXXII - San Jose, United States
Duration: Feb 23 2015Feb 26 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherAdvances in Patterning Materials and Processes XXXII
Country/TerritoryUnited States
CitySan Jose

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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