Deep X-ray lithography for direct patterning of PECVD films

Stefano Costacurta, Luca Malfatti, Alessandro Patelli, Paolo Falcaro, Heinz Amenitsch, Benedetta Marmiroli, Gianluca Grenci, Massimo Piccinini, Plinio Innocenzi

Research output: Contribution to journalArticleResearchpeer-review

Abstract

An advanced lithographic technique which is based on direct writing of thin films by hard X-rays has been developed. Silica hybrid organic-inorganic films have been deposited by radio frequency plasma-enhanced chemical vapour deposition and have been patterned using deep X-ray lithography with synchrotron light. The exposure to high energy photons removed the organic groups in the films and induced densification of the silica network. The films, after lithographic writing, can be easily chemically etched to obtain well-defined patterns of high quality. By tuning the exposure dose it is possible modulating the structure and the properties of the final material. The overall lithography process can be achieved in two steps, writing by X-rays and chemical etching, therefore employing the hybrid film directly as resist without employing any other intermediate step. The films and the patterned structures have been characterized by ellipsometric spectroscopy, scanning electron microscopy, atomic force microscopy, contact angle measurements, Fourier transform infrared spectroscopy, infrared imaging and Rutherford backscattering. (Figure Presented)

Original languageEnglish
Pages (from-to)459-465
Number of pages7
JournalPlasma processes and polymers
Volume7
Issue number6
DOIs
Publication statusPublished - 22 Jun 2010
Externally publishedYes

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Keywords

  • Deep x-ray lithography
  • Infrared absorption spectroscopy (IR-AS)
  • Lithography
  • Plasma-enhanced chemical vapour deposition (PECVD)
  • Sol-gel
  • Synchrotron light
  • Thin films
  • X-ray

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Polymers and Plastics

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