Optical waveguides derived from a combination of poly(perfluorocyclobutanes) and polymeric cyanates

US6853790B1 · kind B1 · utility

Assignee

• Pirelli Cavi e Sistemi S.p.A. · IT

Inventors

• Monika Bauer · Seligenstadt, DE
• Jörg Bauer · Weingarten, DE
• Christian Dreyer · Idar-Oberstein, DE
• Norbert Keil · Berlin, DE
• Crispin Zawadzki · Berlin, DE

Key dates

• Filing date: Jul 3, 2000
• Grant date: Feb 8, 2005
• Expiry date: Feb 27, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31547
• WIPO field: Optics
• WIPO sector: Instruments

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 R1 to R8 are independently from each other hydrogen, optionally substituted C1-C10 alkyl, C3-C8 cycloalkyl, C1-C10 alkoxy, 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, CF2 CH2, CHF, CH(CH3), isopropylene, hexafluoroisopropylene, n- or iso-C1-C10 alkylene which may be partly or fully fluorinated, O, NR9 whereby R9 is hydrogen or C1-C10 alkyl, N═N, CH═CH, C(O)O, CH═N, CH═N—N═CH, alkyloxyalkylene having 1 to 8 carbon atoms, S, or Si(CH3)2 optionally 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 …