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:
Aug. 15, 2023
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 form a three-dimensional photonic crystal template with a gradient structure involves irradiating a photoresist composition of a thickness of at least 15 μm from at least four laser beams to yield a periodic patterned with a percolating matrix of mass in constructive volumes of a cured photoresist composition and destructive volumes of voids free of condensed matter where the proportion of constructive volume displays a gradient from the irradiated surface to the substrate after development. For a given light intensity, photoinitiator concentration in the photoresist composition, and a given thickness, by irradiating for a relatively short period, a three-dimensional photonic crystal template displaying a gradient having greater constructive volume proximal the air interface forms and a relatively long irradiation period results in a gradient having greater constructive volume proximal the substrate.