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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationTHERMEC 2013
EditorsB. Mishra, Mihail. Ionescu, T. Chandra
PublisherTrans Tech Publications Ltd
Pages2474-2479
Number of pages6
ISBN (Print)9783038350736, 9783038350736
Publication statusPublished - Jan 1 2014
Externally publishedYes
Event8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV, United States
Duration: Dec 2 2013Dec 6 2013

Publication series

NameMaterials Science Forum
Volume783-786
ISSN (Print)0255-5476

Other

Other8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
CountryUnited States
CityLas Vegas, NV
Period12/2/1312/6/13

Fingerprint

Silicon
pressing
shot
melting points
Melting point
Lenses
transmittance
lenses
Infrared radiation
silicon
Temperature
temperature
Infrared transmission
brittleness
Brittleness
cracks
curvature
Single crystals
Cracks
radii

All Science Journal Classification (ASJC) codes

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

Cite this

Morishita, K., Nakajima, K., Fujii, T., & Shiinoki, M. (2014). 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. In B. Mishra, M. Ionescu, & T. Chandra (Eds.), THERMEC 2013 (pp. 2474-2479). (Materials Science Forum; Vol. 783-786). Trans Tech Publications Ltd.

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. / Morishita, Kohei; Nakajima, Kazuo; Fujii, Takashi; Shiinoki, Masakazu.

THERMEC 2013. ed. / B. Mishra; Mihail. Ionescu; T. Chandra. Trans Tech Publications Ltd, 2014. p. 2474-2479 (Materials Science Forum; Vol. 783-786).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Morishita, K, Nakajima, K, Fujii, T & Shiinoki, M 2014, 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. in B Mishra, M Ionescu & T Chandra (eds), THERMEC 2013. Materials Science Forum, vol. 783-786, Trans Tech Publications Ltd, pp. 2474-2479, 8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013, Las Vegas, NV, United States, 12/2/13.
Morishita K, Nakajima K, Fujii T, Shiinoki M. 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. In Mishra B, Ionescu M, Chandra T, editors, THERMEC 2013. Trans Tech Publications Ltd. 2014. p. 2474-2479. (Materials Science Forum).
Morishita, Kohei ; Nakajima, Kazuo ; Fujii, Takashi ; Shiinoki, Masakazu. / 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. THERMEC 2013. editor / B. Mishra ; Mihail. Ionescu ; T. Chandra. Trans Tech Publications Ltd, 2014. pp. 2474-2479 (Materials Science Forum).
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