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Journal of Micro/Nanolithography, MEMS, and MOEMS • Open Access

Optical microlithography on oblique and multiplane surfaces using diffractive phase masks
Author(s): Peng Wang; Rajesh Menon

Paper Abstract

Micropatterning on oblique and multiplane surfaces remains a challenge in microelectronics, microelectromechanics, and photonics industries. We describe the use of numerically optimized diffractive phase masks to project microscale patterns onto photoresist-coated oblique and multiplane surfaces. Intriguingly, we were able to pattern a surface at 90 deg to the phase mask, which suggests the potential of our technique to pattern onto surfaces of extreme curvature. Further studies show that mask fabrication error of below 40-nm suffices to conserve pattern fidelity. A resolution of 3  μm and a depth-of-focus of 55  μm are essentially dictated by the design parameters, the mask generation tool, and the exposure system. The presented method can be readily extended for simple and inexpensive three-dimensional micropatterning.

Paper Details

Date Published: 22 May 2015
PDF: 7 pages
J. Micro/Nanolith. 14(2) 023507 doi: 10.1117/1.JMM.14.2.023507
Published in: Journal of Micro/Nanolithography, MEMS, and MOEMS Volume 14, Issue 2
Show Author Affiliations
Peng Wang, The Univ. of Utah (United States)
Rajesh Menon, The Univ. of Utah (United States)


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