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  4. Debris-reduced laser machining of polymeric waveguides for optoelectronic applications
 
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2001
Conference Paper
Title

Debris-reduced laser machining of polymeric waveguides for optoelectronic applications

Abstract
A polymer multilayer was spin coated on a substrate and was structured with pulsed KrF-excimer laser radiation to generate optical waveguides. Ablation rate, surface roughness and wall-angles were determined using white light interferometry, atomic force microscopy and light microscopy. Polymeric waveguides can be used for optical transmission and their properties such as mode propagation and absorption losses were detertmined with beam diagnosis. However, compared to other structuring techniques absorption losses of the waveguides are high. One reason for this is the formation of debris on the surface of the waveguides during the process of structuring. Therefore, an investigation of the distribution of debris during structuring was conducted. Different types of processing gases and pressures were used to decide which configuration provides a minimum amount of debris. Absorption losses were again determined and successfully decreased alter debris reducing strategies were applied.
Author(s)
Berden, T.
Kreutz, E.W.
Poprawe, R.
Fraunhofer-Institut für Lasertechnik ILT  
Mainwork
Laser applications in microelectronic and optoelectronic manufacturing VI  
Conference
Conference "Laser Applications in Microelectronic and Optoelectronic Manufacturing" 2001  
Language
English
Fraunhofer-Institut für Lasertechnik ILT  
Keyword(s)
  • polymers

  • debris

  • waveguide

  • optoelectronic

  • micromachining

  • absorption loss

  • excimer

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