IJAT Vol.13 No.6 pp. 817-824
doi: 10.20965/ijat.2019.p0817


Study on Infrared Transmittance of Si-Polymer Hybrid Structure Press Molded Using a Coupling Agent

Hibiki Ishide and Jiwang Yan

Department of Mechanical Engineering, Faculty of Science and Technology, Keio University
3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan

Corresponding author

June 27, 2019
September 3, 2019
November 5, 2019
infrared lens, silicon, polymer, press molding, hybrid optics

Hybrid structures of single-crystal silicon and high-density polyethylene (HDPE) with high transmittance in the mid-to-far infrared region are used as infrared lens substrates. The hybrids are usually fabricated by high-precision press molding. The Si-HDPE hybrid lens previously fabricated had a low transmittance in the 9–10 μm wavelength region, thereby limiting its application for human body detection. In this study, a Si-polymer hybrid structure was fabricated using a new polymer without any silane coupling agent. Interfacial adhesion between the polymer and the Si substrate was realized with an extremely thin (a few micron thick) layer of an interfacial silane coupling agent. The press molding conditions that led to improved bonding strength and infrared transmittance of the hybrid substrate were investigated. A transmittance similar to that of a single-crystal Si substrate was achieved in the 9–10 μm wavelength range.

Cite this article as:
H. Ishide and J. Yan, “Study on Infrared Transmittance of Si-Polymer Hybrid Structure Press Molded Using a Coupling Agent,” Int. J. Automation Technol., Vol.13, No.6, pp. 817-824, 2019.
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Last updated on Feb. 17, 2020