Wednesday, March 14, 2018

RMD Dynasil employ CdTe ALD process for passivating HgCdTe IR sensors

Dynasil’s Radiation Monitoring Devices (RMD) is a world-renowned expert in the scintillation, photodetection, and radiation detection industries. At the recent Dynasil Corporation of America Annual Stockholder Meeting and Investor Presentation Conference Call it was reveiled that they have commericiallized an ALD process for passivating HgCdTe sensors with semiconductor-grade CdTe layer. The ALD coating is conformal, continuous and pinhole-free. Such low temperature CdTe ALD films have been previously published by Bengi Hanyaloglu et al (LINK).

Applications for these sensors are for:
  • Space IR telescopes
  • Tactical night vision googles and binoculars etc.
Peter Sulick - Chairman, President & CEO has this to say about the application (Seeking Alpha call transcript LINK)

"Another exciting area for research that is going on at RMD is its activation of the mercaptal infrared arrays, third-generation infrared arrays, and as people in the optic suite are well aware, this mercaptal infrared arrays require stabilization on the surfaces because of the semiconductor bonds being open at the surfaces. And one of the ways to do that is through activation layer of mercaptal films, and RMD has developed a proprietary technology using atomic layer deposition to deposit this mercaptal films. And the important advantage that our technology brings is that these are controllable films, which can be deposited at much lower temperatures than currently thought, and that can have a big impact in the yield and in the utility of these infrared sensors. So we are excited about where this area is going."


RMD has developed an ALD process for passivating HgCdTe sensors with semiconductor-grade CdTe layer. The ALD coating is conformal, continuous and pinhole-free. (Dynasil 2018 Annual Meeting Management Presentation LINK