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3 May 2010 Recent results of two-dimensional LW- and VLW-HgCdTe IR FPAs at AIM
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In recent years AIM has expanded its portfolio of standard IR focal plane arrays (FPA) in the 3-5μm (MWIR) and 8- 10μm (LWIR) spectral range by 2-dimensional IR detectors, sensitive in the 0.9-2.5μm (SWIR) and especially in the 10- 15μm VLWIR. As far as dark current behavior, homogeneity, and operability are concerned, the VLWIR spectral range constitutes a major challenge for sensor material improvement and device development. This paper reports on the latest technological advancements at AIM. These advancements are not limited to the applications demonstrated in this paper, but a wide range of AIM products will benefit. A reduction of the pixel pitch from 24μm to 15μm is the result of increasing demands for compact detection modules with reduced weight, size, power consumption and improved costefficiency. Performance characterization for such a reduced pitch of 640x512 module in the LWIR (cut-off 9.2μm at 67 K) yields a mean NETD of ~37 mK and an operability of >99.8%. Extending the detection wavelength further into the VLWIR is of major interest for space applications such as Meteosat Third Generation (MTG), which poses challenging requirements for sensor material homogeneity and dark current density. To meet this requirement, an extrinsic doping approach is utilized on a 256x256 HgCdTe Focal Plane Array (FPA) with ~14μm cut-off wavelength at 55K operating temperature, a dark current density of about 1pA/μm2 is demonstrated.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. Ziegler, D. Eich, S. Hanna, A. Bauer, H. Bitterlich, M. Bruder, K.-M. Mahlein, H. Lutz, T. Schallenberg, J. Wenisch, and R. Wollrab "Recent results of two-dimensional LW- and VLW-HgCdTe IR FPAs at AIM", Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 766038 (3 May 2010);


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