Hui QIAO, Ni-Li WANG, Tian-Yi LAN, Shui-Ping ZHAO, Qi-Zhi TIAN, Ye LU, Reng WANG, Qin HUO, Fan SHI, Yi-Dan TANG, Kai-Hui CHU, Jia JIA, Qing ZHOU, Xiao-Yu SUN, Pei-Lu JIANG, Yi LUO, Xin-Yi CHENG, Xiang-Yang LI. Failure modes and analysis for HgCdTe linear photoconductive detectors[J]. Journal of Infrared and Millimeter Waves, 2022, 41(6): 1009
- Journal of Infrared and Millimeter Waves
- Vol. 41, Issue 6, 1009 (2022)
Fig. 1. The schematic diagram of HgCdTe photoconductive detector (a) side view, (b) vertical view, (c) vertical view of serpentine geometry pixel, (d) side view of overlap contact geometry
Fig. 2. Photographs of HgCdTe photoconductive detector with two kinds of pixel geometry
Fig. 3. Diagram of FTIR spectrum of HgCdTe photoconductors
Fig. 4. Diagram of signal and noise measurement of HgCdTe photoconductive detectors
Fig. 5. FTIR spectra of wide-band-spectrum HgCdTe photoconductive detectors
Fig. 6. Normal and abnormal spectra of narrow-band-spectrum photoconductive detectors
Fig. 7. Spectra of HgCdTe photoconductor passivated with SiO2 film at 300 K and 77 K
Fig. 8. Distribution of resistance of a linear detector with two abnormal pixels
Fig. 9. Photograph of two abnormal pixels together with EDS result
Fig. 10. Distribution of resistance of a linear detector with some abnormal pixels
Fig. 11. Polarizing microphotograph of pixels with abnormal resistance
Fig. 12. Distribution of resistance of two linear detectors
Fig. 13. Distribution of resistance for two linear detectors
Fig. 14. Photographs of two pixels with abnormal signal and noise before and after packaging
Fig. 15. Diagram of detector with normal and abnormal metal contact
Fig. 16. Diagram of voltage drop measurement for pixel-related ground electrode
Fig. 17. Comparison results of pixel-related voltage drop before and after ground electrode thickening
Fig. 18. Comparison of normalized resistance for two linear detectors after successive tests
Fig. 19. Variation of FOM for two linear detectors after successive tests
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Table 1. A linear detector with two pixels of abnormal signal and noise
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Table 2. A linear detector with three pixels of abnormal signal and noise
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Table 3. A linear detector with three abnormal pixels due to power burn-in
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Table 4. A linear detector with two pixels of abnormal crosstalk
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Table 5. Summary of failure modes、origins and identification methods
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