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:
Mar. 23, 1999
Filed:
Apr. 23, 1997
Applicant:
Inventor:
Sureshchandra Mishrilal Ojha, Harlow, GB;
Assignee:
Northern Telecom Limited, Montreal, CA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
438381 ; 438 31 ; 385130 ;
Abstract
An optical circuit device having a core supported on a substrate incorporates a wave guide being in a layer of the core. The structure is provided with a cladding layer by depositing by means of a PECVD process a cladding material on the wave guide core and maintaining a negative bias between the substrate or the core and earth while the deposition is proceeding.
Ojha, Sureshchandra. (1999). Planar wave guide cladding (U.S. Patent No. 5885881). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5885881
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile