Optical waveguides – Planar optical waveguide
Reexamination Certificate
2005-02-08
2005-02-08
Wu, David W. (Department: 1713)
Optical waveguides
Planar optical waveguide
C385S143000, C428S421000, C428S422800
Reexamination Certificate
active
06853790
ABSTRACT:
The present invention is directed to optical waveguides or waveguide systems, comprising at least (a) a first material which is a poly(perfluorocyclobutane), and in direct contact to this material, (b) a second material which is a polycyanate resin made from at least one aromatic difunctional cyanate of formula (I) wherein R1to R8are independently from each other hydrogen, optionally substituted C1-C10alkyl, C3-C8cycloalkyl, C1-C10alkoxy, halogen, phenyl or phenoxy, the alkyl or aryl groups being unfluorinated, partly fluorinated or fully fluorinated with the proviso that (I) carries at least 1 fluorine atom, and Z is a chemical bond, SO2, CF2CH2, CHF, CH(CH3), isopropylene, hexafluoroisopropylene, n- or iso-C1-C10alkylene which may be partly or fully fluorinated, O, NR9whereby R9is hydrogen or C1-C10alkyl, N═N, CH═CH, C(O)O, CH═N, CH═N—N═CH, alkyloxyalkylene having 1 to 8 carbon atoms, S, or Si(CH3)2optionally in mixture with other components. Preferably, both the first and the second materials are in the form of a thin layer, the layers directly adhered to each other. Either the waveguide can be made from the first material and at least one of the buffer layer and the cladding layer can be made from the second material, or vice versa.
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Bauer Jörg
Bauer Monika
Dreyer Christian
Keil Norbert
Zawadzki Crispin
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Hu Henry S
Pirelli Cavi e Sistemi S.p.A.
Wu David W.
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