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:
Oct. 11, 2005
Filed:
Jul. 16, 2001
Anisul Khan, Sunnyvale, CA (US);
Ajay Kumar, Sunnyvale, CA (US);
Anisul Khan, Sunnyvale, CA (US);
Ajay Kumar, Sunnyvale, CA (US);
Other;
Abstract
Thermo-optic devices including a bottom cladding layer, a patterned core material and a top cladding layer, each having a different refractive index, can be made by depositing a heater material, such as tungsten or chromium, on the outside of the bottom and/or top cladding layer. Depending on the refractive index differences between the cladding layers and the core layers, the amount of heater material can also be varied. The heater material can surround the cladding layers, can be present on the sidewalls and top only, or the sidewalls alone, to provide sufficient heat to change the refractive index of the layers and thus the path of light passing-through the device. These devices when built into the substrate can be connected to underlying devices for vertical integration, or connected to other devices and components formed on the same substrate for increased integration.