Infrared and Laser Engineering, Volume. 51, Issue 3, 20210276(2022)
Coplanarity evaluation model of long linear LWIR detector
Figures & Tables(18)
Fig. 9. Curves of the flatness of butting base with the thickness of cold plate
Fig. 10. Curves of the flatness of butting base with the CTE of cold plate
Fig. 11. Schematic of the design improvement of laminated structure
Fig. 12. Curves of the flatness of butting base with the thickness of cold plate after design improvement
Fig. 13. Curves of the flatness of butting base with the CTE of cold plate after design improvement
Fig. 16. Location of sample point in the flatness test of detector
Table 1. Flatness of butting base under different cases
View tableView in ArticleTable 1. Flatness of butting base under different cases
Case No. Load Influencing factor which is analyzed Changed conditions relative to basic settings Flatness/μm 1 Packaging stress Packaging stress Basic settings −1.68 2 Packaging stress and atmospheric pressure Atmospheric pressure 1 atmospheric pressure 6.73 3 0.5 atmospheric pressure 2.53 4 Packaging stress and assembly stress Flatness of fixed interface Forced displacement is 0.05 mm −2.47 5 Forced displacement is 0.03 mm −2.14 6 Packaging stress and temperature load Thermal stress The temperature load is applied 176.41 7 Packaging stress and temperature load Stiffness of cold chain Young's modulus of cold chain is 14400 GPa 280.44 8 Young's modulus of cold chain is 1.44 GPa 154.45 9 Packaging stress and temperature load Stiffness of support pole Young's modulus of support pole is 11000 GPa 70.65 10 Young's modulus of support pole is 1.1 GPa 192.61 11 Packaging stress and temperature load Coefficient of thermal expansion of cold plate CTE of cold plate is 8.0×10-6/K 349.13 12 CTE of cold plate is 1.0×10-6/K −75.85 13 Packaging stress and temperature load Thickness of cold plate Thickness of cold plate is 5 mm 157.93 14 Thickness of cold plate is 6.5 mm 133.54
Table 2. Material parameters for verifying analysis
View tableView in ArticleTable 2. Material parameters for verifying analysis
Name of monolayer Young's modulus/GPa Poisson's ratio Thickness/ mm CTE/ K−1 Layer 1 123 0.3 3.5 Variable Layer 2 202 0.3 5 5.80×10−6 Layer 3 335 0.3 5 3.26×10−6
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Jun Ma. Coplanarity evaluation model of long linear LWIR detector[J]. Infrared and Laser Engineering, 2022, 51(3): 20210276
Paper Information
Category: Infrared technology and application
Received: Apr. 28, 2021
Accepted: --
Published Online: Apr. 8, 2022
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