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:
Jan. 29, 2002
Filed:
Mar. 05, 1999
Mats Robertsson, Stockholm, SE;
Olle Jonny Hagel, Linköping, SE;
Göran Gustafsson, Linköping, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A thin-film multilayer structure on top of a substrate has three polymer layers having adapted refractive indices in which optical waveguides are formed. Signal conducting metal layers are located at these three thin-film layers. The metal is etched away at the waveguide cores so that ordinary optical waveguides of channel-type are obtained having a refractive index difference between the core and the cladding material. Holes are etched in the polymer layers in order to form electrical vias. Mirrors can be formed by laser ablating to provide connection of an optical waveguide to some component and to provide optical vias, in the case where another similar set of three polymer layers are applied on top of the layers shown. Hence, electrical and optical interconnections can be integrated in the multilayer structure using a minimum number of polymer layers and the optical waveguides can be constructed to have a low loss.