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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 23 — Nov. 9, 2009
  • pp: 20945–20951

Single-anchor support and supercritical CO2 drying enable high-precision microfabrication of three-dimensional structures

Shoji Maruo, Takuya Hasegawa, and Naoki Yoshimura  »View Author Affiliations


Optics Express, Vol. 17, Issue 23, pp. 20945-20951 (2009)
http://dx.doi.org/10.1364/OE.17.020945


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Abstract

In high-precision two-photon microfabrication of three-dimensional (3-D) polymeric microstructures, supercritical CO2 drying was employed to reduce surface tension, which tends to cause the collapse of micro/nano structures. Use of supercritical drying allowed high-aspect ratio microstructures, such as micropillars and cantilevers, to be fabricated. We also propose a single-anchor supporting method to eliminate non-uniform shrinkage of polymeric structures otherwise caused by attachment to the substrate. Use of this method permitted frame models such as lattices to be produced without harmful distortion. The combination of supercritical CO2 drying and the single-anchor supporting method offers reliable high-precision microfabrication of sophisticated, fragile 3-D micro/nano structures.

© 2009 OSA

OCIS Codes
(120.4610) Instrumentation, measurement, and metrology : Optical fabrication
(190.4180) Nonlinear optics : Multiphoton processes
(160.5335) Materials : Photosensitive materials

ToC Category:
Laser Microfabrication

History
Original Manuscript: October 2, 2009
Revised Manuscript: October 26, 2009
Manuscript Accepted: October 27, 2009
Published: November 2, 2009

Citation
Shoji Maruo, Takuya Hasegawa, and Naoki Yoshimura, "Single-anchor support and supercritical CO2 drying enable high-precision microfabrication of three-dimensional structures," Opt. Express 17, 20945-20951 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-23-20945


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