The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 12, 2006
Filed:
Mar. 16, 2004
Kang-hyun Baek, Minneapolis, MN (US);
Anand Gopinath, Wayzata, MN (US);
H. Aaron Christmann, White Bear Lake, MN (US);
Kang-Hyun Baek, Minneapolis, MN (US);
Anand Gopinath, Wayzata, MN (US);
H. Aaron Christmann, White Bear Lake, MN (US);
Regents of the University of Minnesota, Minneapolis, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A method of making a photonic crystal includes obtaining single spheres for use in making a self assembled opal structure. Spherical particles are placed centrifuge and separated from doublets using a relative difference in sedimentation velocity in response to centrifugal force. A method includes drawing a substrate through a meniscus at a declination to uniformly deposit spheres on the substrate. Three-dimensional photonic crystals including buried waveguides are also provided.