Optical waveguides – Having particular optical characteristic modifying chemical... – Of waveguide core
Patent
1994-02-18
1995-06-13
Lee, John D.
Optical waveguides
Having particular optical characteristic modifying chemical...
Of waveguide core
313504, 385129, 427271, 427384, 430281, 430290, 430321, G02B 610
Patent
active
054251257
ABSTRACT:
A method is provided for forming in a semiconductive conjugated polymer at least first and second legions having different optical properties. The method comprises: forming a layer of a precursor polymer and permitting the first region to come into contact with a reactant, such as an acid, and heat while permitting the second region to come into contact with a lower concentration of the reactant. The reactant affects the conversion conditions of the precursor polymer in such a way as to control the optical properties of at least the first region so that the optical properties of the first region are different from those of the second region. The precursor polymer may comprise a poly(arylene-1, 2-ethanediyl) polymer, at least some of the ethane groups of which include a modifier group whose susceptibility to elimination is increased in the presence of the reactant.
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Bradley Donal D.
Brown Adam R.
Burn Paul L.
Friend Richard H.
Holmes Andrew B.
Cambridge Display Technology Limited
Lee John D.
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