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:
Sep. 16, 2003
Filed:
Jan. 18, 2000
Christopher L. Chua, San Jose, CA (US);
David W. Treat, San Jose, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A photonic device includes a plurality of semi-conductor layers formed on a substrate. The semi-conductor layers include an active layer and a current controlling region in close proximity to the active layer. The current controlling region includes a relatively small electrically conductive section or aperture, and a relatively large non-conductive section. A plurality of channels in the device are arranged to bound the electrically conductive section within their perimeter. The channels are spaced close enough together, and close enough to the desired aperture region to permit a relatively brief oxidation process to precisely isolate the aperture. The remainder of the current controlling region, i.e. beyond the aperture is also altered to present a high resistance. The photonic device also includes a relatively large surface area electrical contact used to drive the device. The large size desirably lowers overall resistance.