Conical structures produced by excimer laser irradiation of polymers

B. Hopp, Zs Bor, E. Homolya, E. Mihalik

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

The development of conical structures on the surface of excimer laser ablated polymers (polyethylene(naphtalate), polycarbonate and polyimide) is studied. It is demonstrated that this phenomenon has a lower threshold and an upper limit fluence which values depend on the material. The lower value is equivalent of the ablation threshold of the sample, below which the etch does not occur. In accordance with our assumption the upper limit corresponds to the ablation threshold of the particulate impurities which are responsible for the formation of cones, because these impurities remove from the surface of the polymers with the other ablating fragments when the fluence exceeds the upper limit. The dependence of the apex angles of the cones on the fluence and the number of pulses is investigated. A simple etching model based on the diffraction and interference theories is proposed to explain the formation of the conical structure.

Original languageEnglish
Pages (from-to)389-393
Number of pages5
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3423
DOIs
Publication statusPublished - Jul 14 1998
Event2nd GR-I International Conference on New Laser Technologies and Applications - Olympia, Greece
Duration: Jun 1 1997Jun 4 1997

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Keywords

  • Ablation
  • Cones
  • Excimer laser
  • Polymers
  • Surface structure

ASJC Scopus subject areas

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

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