26 July 1999 2048x2048 HgCdTe focal plane arrays for astronomy applications
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Abstract
Rockwell is developing the world's largest HgCdTe IR focal plane array (FPA) for astronomy and low background applications. The format of the device is a hybrid 2048 X 2048 with a unit cell size of 18 micrometers X 18 micrometers . SWIR detectors with a spectral response of 0.85 micrometers to 2.5 micrometers have been processed on liquid phase epitaxy (LPE) HgCdTe on sapphire substrates. The MWIR detectors with a spectral response of 0.4 micrometers to 5 micrometers will be processed on molecular beam epitaxy HgCdTe on CdZnTe substrates. The multiplexer has been designed and fabricated at Conexant. Room temperature probing shows that the device is functional with excellent yield. Novel hybrid fabrication techniques will be used to demonstrate the FPA. This HAWAII-2 device is based on the highly successful HAWAII 1024 X 1024 device and the performance will be similar. The ultimate performance expected from the array is: dark currents of < 0.01 3-/s, quantum efficiency of > 75 percent across the spectral band, and noise levels of < 3 e- for the SWIR and < 10 e- for the MWIR band using Fowler sampling. We expected to achieve these performance levels at 77K for the SWIR and > 40K for the MWIR band. The status of the 2048 X 2048 detector arrays and FPAs are discussed.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kadri Vural, Kadri Vural, Lester J. Kozlowski, Lester J. Kozlowski, Donald E. Cooper, Donald E. Cooper, C. A. Chen, C. A. Chen, Gary L. Bostrup, Gary L. Bostrup, Craig A. Cabelli, Craig A. Cabelli, Jose M. Arias, Jose M. Arias, Jagmohan Bajaj, Jagmohan Bajaj, Klaus-Werner Hodapp, Klaus-Werner Hodapp, Donald N. B. Hall, Donald N. B. Hall, William E. Kleinhans, William E. Kleinhans, G. G. Price, G. G. Price, J. A. Pinter, J. A. Pinter, } "2048x2048 HgCdTe focal plane arrays for astronomy applications", Proc. SPIE 3698, Infrared Technology and Applications XXV, (26 July 1999); doi: 10.1117/12.354532; https://doi.org/10.1117/12.354532
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