• Infrared and Laser Engineering
  • Vol. 46, Issue 5, 504001 (2017)
Hao Lichao1、2、*, Huang Aibo2, Xie Xiaohui2, Li Hui2, Lai Canxiong1, Chen Honglei2, Wei Yanfeng2, and Ding Ruijun2
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10.3788/irla201746.0504001 Cite this Article
    Hao Lichao, Huang Aibo, Xie Xiaohui, Li Hui, Lai Canxiong, Chen Honglei, Wei Yanfeng, Ding Ruijun. 32×32 very long wave infrared HgCdTe FPAs[J]. Infrared and Laser Engineering, 2017, 46(5): 504001 Copy Citation Text show less

    Abstract

    Very long wave infrared(VLWIR) band is widely used for the remote atmosphere sounding applications, particularly for humidity, CO2 levels, cloud structure and temperature distribution. A 32×32 VLWIR HgCdTe focal plane array(FPA) was designed. The photosensitive component was fabricated by B+ ion implanting As-doped p-type material of liquid phase epitaxial growth on ZnCdTe substrate. The readout integrated circuit(ROIC) used a buffered direct injection(BDI) structure with an improved background suppression. The VLWIR focal plane array(FPA) was achieved by combining the HgCdTe detector with ROIC in terms of indium bump bonds, the cutoff wavelength of which was over 14 ?滋m. The pixel occupied an area of 60 ?滋m×60 ?滋m. It could be operated at the temperatures of 50 K. The test results show that the peak detectivity and blackbody responsivity of PFAs are 2.57×1010 cmHz1/2/W and 1.35×107 V/W, respectively. The nonuniformity of responsivity is about 45%, and dead pixels ratio is less than 12%.
    Hao Lichao, Huang Aibo, Xie Xiaohui, Li Hui, Lai Canxiong, Chen Honglei, Wei Yanfeng, Ding Ruijun. 32×32 very long wave infrared HgCdTe FPAs[J]. Infrared and Laser Engineering, 2017, 46(5): 504001
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