Study on infrared transmittance of si-polymer hybrid structure press molded using a coupling agent

Hibiki Ishide, Jiwang Yan

Research output: Contribution to journalArticle


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.

Original languageEnglish
Pages (from-to)817-824
Number of pages8
JournalInternational Journal of Automation Technology
Issue number6
Publication statusPublished - 2019 Jan 1



  • Hybrid optics
  • Infrared lens
  • Polymer
  • Press molding
  • Silicon

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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