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. 05, 2003
Filed:
Feb. 05, 2001
Alexei Glebov, San Bruno, CA (US);
Mark McCormack, Livermore, CA (US);
Fujitsu Limited, Kawasaki, JP;
Abstract
An interposer and method for producing an interposer. The method comprises forming in a substrate a cladding layer having a known density value; and forming in the substrate a waveguide core layer in contact with the cladding layer and also having a known density value which is greater than the density value of the cladding layer. The method further includes forming in the substrate a second cladding layer in contact with the waveguide core layer and having a known density value less than the density value of the waveguide core layer. A method for producing a light-guiding structure comprising forming in a substrate a cladding layer having a top substrate surface and a porosity value; and forming in the substrate a waveguide core layer in contact with the cladding layer and having a porosity value less than the porosity value of the cladding layer. The method also includes forming in the substrate another cladding layer in contact with the waveguide core layer and having a porosity value greater than the porosity value of the waveguide core layer. The two cladding layers and the waveguide core layer terminate in the top substrate surface of the substrate.