Optical coherence tomography as a method of quality inspection for printed electronics products

Jakub Czajkowski*, Tuukka Prykäri, Erkki Antero Alarousu, Jaakko Palosaari, Risto Myllylä

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Application of time domain, ultra high resolution optical coherence tomography (UHR-OCT) in printed electronics products' quality inspection is demonstrated. Presented study was done using experimental UHR-OCT device based on a Kerr-lens mode locked Ti:sapphire femtosecond laser, photonic crystal fibre and modified, free-space Michelson interferometer. Possibilities of the technique are demonstrated by analysis of an RF antenna-example of printed electronics products. Measurements were done with submicron axial resolution, offered by UHR-OCT system developed in our laboratory. Such high resolution is necessary due to the thickness of material layers used in printed electronics. In addition to tomography imaging, numerical results were compared with data provided by two commercially available measurement devices: Wyko NT3300 optical profiler and Dektak 8 stylus profiler (both Veeco). Comparison of profile heights and their spatial correlation is presented. Ability for full volumetric reconstruction and accuracy justified with reference measurements prove OCT to be a reliable tool in printed electronics product testing.

Original languageEnglish (US)
Pages (from-to)257-262
Number of pages6
JournalOptical Review
Volume17
Issue number3
DOIs
StatePublished - Jun 18 2010

Keywords

  • Imaging
  • Low coherence interferometry
  • Non-invasive
  • Optical measurement
  • Printed electronics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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