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:
Nov. 05, 2002
Filed:
Feb. 04, 2000
Applicant:
Inventors:
Yves Ruello, Lannion, FR;
Benoit Cadier, Ploumanach, FR;
Assignee:
France Telecom (SA), Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B05D 5/06 ; H05H 1/30 ; D02G 3/00 ;
U.S. Cl.
CPC ...
B05D 5/06 ; H05H 1/30 ; D02G 3/00 ;
Abstract
A method for the deposition of a coating layer on an optical fiber while it is being drawn. The coating layer is designed to reduce the permeability of the optical fiber to water vapor and therefore to increase its lifetime. The method is characterized in that it consists in carrying out a decomposition of a gas mixture of boron halogenide and hydrogen and/or boron halogenide and ammonia gas by a microwave plasma-assisted addition of energy and in that the operation is conducted in the presence of a carrier gas in order firstly to carry the gas mixture to a reaction medium and secondly to activate the plasma.