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Chen F.,China Airborne Missile Academy | Su X.,China Airborne Missile Academy | Su X.,Aviation Key Laboratory of Science and Technology on Infrared Detector | Ma S.,China Airborne Missile Academy | And 2 more authors.
Journal of Applied Optics | Year: 2015

Mid-wave(MW) antireflective films were coated on double-side polished Ge substrate, and the films were experimented in hygrothermal environment for sustaining 24 h, 2×24 h, 3×24 h, 4×24 h, 5×24 h, 7×24 h, …, 12×24 h, respectively. The effects of hygrothermal environment on the reliability including transmittance and adhesion of Ge-based MW antireflective films were studied.The results indicate that, the transmittance of MW antireflective films becomes lower gradually after sustained in the hygrothermal environment, and the absorption peak of CO2 and H2O turnes up, resulted from the increase of the content of CO2 and H2O in the films sustained under hygrothermal environment for enough time; The fringe of film becomes desquamated after 10×24 h in hygrothermal environment, and from that time, the average transmittance is lower than 85%. ©, 2015, The No. 205 Research Institute of China Ordnance Industry. All right reserved.


Chen F.,China Airborne Missile Academy | Si J.,China Airborne Missile Academy | Si J.,Aviation Key Laboratory of Science and Technology on Infrared Detector | Shi Z.,China Airborne Missile Academy
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2015

New requirements on the reliability of the detector are put forward for the application of infrared detector in some special environment. In order to study the effect of hygrothermal environment on PbS detector performance, the PbS films had been prepared by CMD, surface morphology of the PbS films were showed, performance and experiment between dry and hygrothermal environment were specified. The influence of Rd, Vs, Vn and D* between dry and hygrothermal environment were analyzed. The Rd of PbS photoconductive detectors had been incresed in hygrothermal environment and decresed in dry environment. The varieties of Rd was reversible between dry and hygrothermal environment, for the resistance of the PbS particles R0 and ΔR that had produced from the absorption of H2O in hygrothermal environment were constituted an equivalent series resistance, and ΔR changed with PbS detector in dry and hygrothermal environment, to form a kind of similar to the adjustable state variable resistance. The trend of Vn variety between dry and hygrothermal environment is same to that of the Rd, and on the opposition that of the D*. © 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.


Shen X.,China Airborne Missile Academy | Lv Y.,China Airborne Missile Academy | Lv Y.,Aviation Key Laboratory of Science and Technology on Infrared Detector | Liu W.,China Airborne Missile Academy | And 3 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2014

With the development of InSb large-scale Infrared Focal Plane Arrays (IRFPA), wet etching process has not met the new technological requirement of IRFPA. A novel wet etching process was expatiated with suitable ratio citric acid/H2O2 as etchant instead of lactic acid/nitric acid in being and assistant etching facility using N2 agitation. The results from comparison and analysis of the experiment clearly indicate that the surface morphology etched by new process, compared with the conventional process, has less lateral etching and mesa trench, more surface uniformity and lower roughness. Otherwise, the electrical properties is improved with lower leak current.


Yao G.,China Airborne Missile Academy | Yao G.,Aviation Key Laboratory of Science and Technology on Infrared Detector | Zhang L.,China Airborne Missile Academy | Zhang L.,Northwestern Polytechnical University | And 3 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2015

Dry etching and wet etching were usually used in the mesa etching process of InAs/GaSb SLs. Three kinds of etch atmosphere (Cl2 based, Ar based and CH4 based)were studied in inductively coupled plasma (ICP) dry etching. The results show that the CH4 based atmosphere give much more smooth surface and less etch pits according to the SEM measurement. Then wet etching was introduced to eliminate the etching damage of ICP dry etching, tartaric acid based etchant and phosphoric acid based etchant, were studied. It was found that the phosphoric acid based etchant gave better result to remove etching damage, and provide a more stable etching rate. InAs/GaSb SLs photodiodes by standard photolithographic procedures were fabricated using this etching recipe. The diodes exhibits a high breakdown voltage and low leakage current, the measurement result reveals a dynamic impedance values of R0A =1.98×104 Ωcm2 at 77 K. ©, 2015, Chinese Society of Astronautics. All right reserved.


Wang Y.,China Airborne Missile Academy | Lu X.,China Airborne Missile Academy | Meng C.,China Airborne Missile Academy | Meng C.,Aviation Key Laboratory of Science and Technology on Infrared Detector | And 9 more authors.
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2015

The cooled InSb infrared focal plane array(IRFPA) detectors should work in the temperature as low as 80 K. As a result, detectors are commonly subjected to thousands of thermal cycle from 80 K to room temperature(300 K) in the entire life cycle. Thermal cycle characteristic of the InSb IRFPA detector was studied. The FPA photoelectric parameter, Dewar heat load and J-T cooling characteristics were analyzed. The results indicated that the maximal fluctuation of the detectivity was 5.5%, the maximal fluctuation of the responsivity was 4.8%, and the number of dead pixels did not increase. The experimental results exhibited that the detectors could undergo at least 2 000 thermal cycles, which provides reference for the research and improvement of detector fabrication. © 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.

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