Latest developments on MCT staring arrays

Abstract

HgCdTe (Mercury Cadmium Telluride / MCT) staring arrays for infrared detection do show constant improvements regarding their compactness and performances. New detectors are now proposed offering system solutions in the different IR wavebands and profiting of the latest technology improvements as well as MCT performance advantages and cost reduction. As a matter of fact, the size of MCT wafer has grown to 4", the pixel pitch was lowered to 15µm while maintaining outstanding results on the Focal Plane Arrays (FPA) uniformity. New functions as the Analog to Digital Conversion (ADC) are added to read-out circuits. Results are presented concerning Non Uniformity Corrections (NUC) stabilities for two Sofradir products. Then results from developments of integrated ADC are addressed and finally, the Jupiter 1280x1024 mid-wave (MWIR) MCT detector performance results are presented.

Fabrication and Characterization of Small Unit-Cell Molecular Beam Epitaxy Grown HgCdTe-on-Si Mid-Wavelength Infrared Detectors

“…9. The plot shows that the detector exhibits diffusion limited (~n I -2 ) performance characteristics Wafer ID 1 (lm) 2 (lm) 3 (lm) 4 (lm) 5 (lm) XY (lm) 4-5-379 5.9 5.9 5.9 5.9 6.1 11-12 4-5-383 5.8 5.9 5.8 5.9 5.9 11-12 4-5-385 5.9 5.9 5.7 5.8 5.9 11-12 4-5-395 6.0 6.0 6.0 6.0 6.1 [11][12] The measurement locations correspond to the 4-in. wafer labels illustrated in Fig.…”

“…HgCdTe/Ge wafers, thus showing MBE HgCdTe growth on alternative substrates to CdZnTe as a viable approach to yield high quality large format, small pixel FPAs. 11,12 This paper will report on detector level characterization and discuss factors associated with detector design, MBE growth, and detector array fabrication for 15 lm unit-cell FPAs at RVS.…”