Research Scientist, III/V Compound Epitaxy Materials Characterization

Research | Cork, Ireland

The Research Scientist will be responsible for materials characterization of epitaxy wafers used for fabrication of LEDs. The role includes ownership of the epitaxy wafer characterization tools as well as analysis of the data generated. The individual filling this position is expected to work independently and lead projects, as well as within teams interfacing with other engineers, technicians and/or outside vendors to complete all necessary tasks. In particular close collaboration with epitaxy growers is critical.


  • Taking ownership of characterization tools for epitaxy wafers,including photoluminescence wafer mapper, thickness mapper, wafer bow measurement, and X ray diffractometer.
  • Ensuring uptime of tools, coordinating upgrades & repairs with tool manufacturer & keeping tools calibrated against standards.
  • Coordinating and completing qualification of new characterization tools.
  • Analysing wafer characterization data and creating trend charts for key material parameters.
  • Completing advanced characterization of epitaxy wafers using for example atomic force microscopy and cathodoluminescent techniques, and correlating results with epitaxy growth parameters.
  • Characterizing III-V epitaxy material by e.g. TLM, Hall and CV measurements.
  • Coordinating characterization with external vendors for structural characterization and analysis of III-N and AlInGaP LED wafers, for example TEM, SIMS.

Minimum Qualifications

  • M.S. in Materials Science, Applied Physics, Electrical Engineering or equivalent field.
  • Minimum 3 years of experience with optical and materials characterization of III-N or III-V wafers.
  • Experience with statistical data analysis of large data sets, e.g. using Matlab or Jmp.

Preferred Qualifications

  • Prior experience characterizing epitaxy for LED applications.
  • Experience working with partners and suppliers.
  • Good understanding of MOCVD growth of III-N/III-V epitaxy.

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