Near-net shaping of silicon for optical lens by one-shot pressing at temperature just below silicon melting point and improvement of infrared transmittance by primary recrystallization

Kohei Morishita, Kazuo Nakajima, Takashi Fujii, Masakazu Shiinoki

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Silicon is brittle and easily cracks even under a small load. The difficulty in shaping silicon has prevented breakthroughs in the mass production of silicon lenses for terahertz and infrared technology. We developed a novel method of deforming bulk single-crystal silicon into the required shape by one-shot pressing at a temperature just below the melting point of silicon, despite its brittleness and covalent nature, and realized the near-net shaping of the material into the plano-convex shape with the curvature radius R=7.5 mm for a infrared transmission lens. The crystallographic quality of the obtained lens could be improved by primary recrystallization. The simple method of 'pressing' will enable the mass production of not only silicon lenses but also lenses with a complex shape, such as aspherical lenses, and lens arrays by using dies with desired shape.

本文言語英語
ホスト出版物のタイトルTHERMEC 2013
編集者B. Mishra, Mihail. Ionescu, T. Chandra
出版社Trans Tech Publications Ltd
ページ2474-2479
ページ数6
ISBN(印刷版)9783038350736, 9783038350736
DOI
出版ステータス出版済み - 2014
外部発表はい
イベント8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV, 米国
継続期間: 12 2 201312 6 2013

出版物シリーズ

名前Materials Science Forum
783-786
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

その他

その他8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
Country米国
CityLas Vegas, NV
Period12/2/1312/6/13

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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