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. 10, 2010
Filed:
Jun. 05, 2006
Graeme Douglas Maxwell, Ipswich, GB;
Philip Richard Townley, Colchester, GB;
Robert Campbell Mcdougall, Befordshire, GB;
Graeme Douglas Maxwell, Ipswich, GB;
Philip Richard Townley, Colchester, GB;
Robert Campbell McDougall, Befordshire, GB;
The Centre For Integrated Photonics Limited, Ipswich, GB;
Abstract
A method of fabricating a photonic device comprises the steps of providing a core pattern of waveguide core material () on a base layer () and applying a cladding layer () over the core material 1 and the base layer (). The height of the surface of the cladding layer () over the base layer () varies in dependence on the pattern of core material (). The core pattern is designed with at least two reference regions, each having a width w that is selected to provide a peak of the cladding layer () with a predetermined height h1 over each reference region. The core pattern is further designed such that a line between the peaks of the reference regions is higher than any intervening peaks of the cladding layer, whereby the peaks of the reference regions provide a vertical alignment reference.