Finite Element Analysis on Structural Stress of 8×8 Infrared Focal Plane Array Integrating with Microlens Arrays

Li Wen Zhang; Ming Shao; Qiang Yu; Peng Fei Li

doi:10.4028/www.scientific.net/AMR.442.162

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 442Finite Element Analysis on Structural Stress of...

Finite Element Analysis on Structural Stress of 8×8 Infrared Focal Plane Array Integrating with Microlens Arrays

Abstract:

Based on finite element analysis, the structural stress of 8×8 InSb Infrared Focal Plane Array integrating with microlens arrays dependent on indium bump sizes is systemically researched. Simulation results show that as the diameters of indium bump increase from 16μm to 38μm in step of 2μm, the maximum stress existing in InSb chip first reduces, then increases, and reaches minimum with indium bump diameter 32μm. Yet the maximum stress in the indium bump array is almost unchangeable and keeps at 16.5MPa. The maximum stress in Si readout integrated circuit almost half stress in InSb chip. Besides, the stress appearing on those regions situating just on microlens array is much smaller than its surrounding regions, and the stress distribution is uniform at contacting areas between InSb chip and indium bump.

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Periodical:

Advanced Materials Research (Volume 442)

Pages:

162-166

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.442.162

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Online since:

January 2012

Authors:

Li Wen Zhang, Ming Shao, Qiang Yu, Peng Fei Li

Keywords:

Finite Element Method (FEM), Infrared Focal Plane Array, Micro-Lens Array, Structural Stress

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