IP Library › Granted Patent US 6,929,899
Granted Patent B2
US 6,929,899 · App. 10/050,185 · Granted Aug 16, 2005

Fluorinated photopolymer composition and waveguide device

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Quick Facts
Patent No.
US 6,929,899
App. No.
10/050,185
Granted
Aug 16, 2005
Kind
B2
Abstract

A photosensitive composition having low absorption loss at 1,300-1,610 nm and is suitable for practical waveguide devices. The composition comprises at least one (meth)acrylate prepared from a fluorinated monomer or polymer having minimum two hydroxyl groups, at least one multifunctional non-fluorinated (meth)acrylate and at least one photoinitiator. An optical coating on a variety of substrates is obtained by exposing the photosensitive composition to actinic radiation such as UV light. An optical waveguide device is fabricated by patterning the photosensitive composition on a substrate.

Claims (13)

1. A composition comprising,

a) at least one fluorinated (meth)acrylate prepared from a fluorinated monomer or polymer having at least two hydroxyl groups per molecule;

b) at least one non-fluorinated (meth)acrylate, said at least one non-fluorinated (meth)acrylate being soluble in said fluorinated (meth)acrylate, said non-fluorinated (meth)acrylate having at least two (meth)acrylate groups per molecule; and

c) at least one photoinitiator, said photoinitiator being soluble in the fluorinated (meth)acrylate;

wherein said at least one fluorinated (meth)acrylate is prepared from an ethoxylated fluoropolymer having the following formula:

Rf—(—O—(—CH 2 —CH 2 —O) m —H) n

wherein Rf is a fluorinated moiety having a F/H ratio of at least 3:1, m=1-10, and n=2-6.

2. The composition of claim 1 , wherein said at least one fluorinated (meth)acrylate has a number average molecular weight of at least 400.

3. The composition of claim 1 , wherein said at least one non-fluorinated (meth)acrylate has at least 3 (meth)acrylate groups per molecule.

4. The composition of claim 1 wherein the fluorinated (meth)acrylate is prepared from a fluorinated hydroxy-containing monomer or polymer and (meth)acryloyl chloride using a hindered tertiary amine, said amine having at least one tertiary or quaternary carbon atom.

5. The composition of claim 4 wherein the hindered tertiary amine is N,N-diisopropylethylamine.

6. The composition of claim 1 further comprising additives selected from the group consisting of contrast enhancers, UV stabilizers, antioxidants, surfactants, adhesion promoters, and viscosity thickeners.

7. A polymer coating formed by exposing the composition of claim 1 to an actinic radiation.