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:
Feb. 27, 2024
Filed:
Aug. 05, 2021
Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US);
Shailesh N. Joshi, Ann Arbor, MI (US);
Gaurav Singhal, Champaign, IL (US);
Paul Vannest Braun, Champaign, IL (US);
Danny J. Lohan, Ann Arbor, MI (US);
Kai-Wei Lan, Champaign, IL (US);
Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US);
The Board of Trustees of the University of Illinois, Urbana, IL (US);
Abstract
A method to control the density of a three-dimensional photonic crystal template involves changing the irradiation time from at least four laser beams to yield a periodic percolating matrix of mass and voids free of condensed matter from a photoresist composition. The photoresist composition includes a photoinitiator at a concentration where the dose or irradiation is controlled by the irradiation time and is less than the irradiation time that would convert all photoinitiator to initiating species such that the density of the three-dimensional photonic crystal template differs for different irradiation times. A deposition of reflecting or absorbing particles can be patterned on the surface of the photoresist composition to form a template with varying densities above different areas of the substrate.