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:
May. 05, 2026
Filed:
Dec. 20, 2023
Globalfoundries U.s. Inc., Malta, NY (US);
Avijit Chatterjee, Bangalore, IN;
Yusheng Bian, Ballston Lake, NY (US);
Sujith Chandran, Clifton Park, NY (US);
Aneesh Dash, Bangalore, IN;
Michal Rakowski, Ballston Lake, NY (US);
Riddhi Nandi, Bangalore, IN;
Kenneth J. Giewont, Hopewell Junction, NY (US);
Theodore Letavic, Putnam Valley, NY (US);
Mehrdad Djavid, South Burlington, VT (US);
Ravi Prakash Srivastava, Clifton Park, NY (US);
GlobalFoundries U.S. Inc., Malta, NY (US);
Abstract
Structures for a waveguide escalator, as well as methods of forming such structures. The structure comprises a first waveguide core on a substrate, a second waveguide core, and a back-end-of-line stack including a third waveguide core disposed between the first waveguide core and the second waveguide core. The third waveguide core comprises a layer stack that includes a first layer, a second layer, and a third layer between the first layer and the second layer. The first layer and the second layer comprise a first dielectric material with a first refractive index, and the third layer comprises a second dielectric material with a second refractive index that is less than the first refractive index.