Optical waveguide and dry film for optical waveguide production

Patent metadata

Field	Value
Publication number	US-9448334-B2
Application number	US-201314412424-A
Country	US
Kind code	B2
Filing date	Jul 2, 2013
Priority date	Jul 2, 2012
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

The present invention provides an optical waveguide excellent in all of transparency, a bending property and heat resistance and a dry film for manufacturing an optical waveguide. A clad layer of the optical waveguide according to the present invention is formed by using a dry film containing a polymer comprising at least a (meth)acrylate monomer with an epoxy group and a (meth)acrylate monomer without an epoxy group; and cationic or anionic curing initiator.

First claim

What is claimed is:

1. An optical waveguide comprising a core and a clad enveloping the core, wherein at least the clad is a cured product by epoxy crosslinking a polymer comprising a (meth)acrylate monomer with an epoxy group (A) which is epoxycyclohexylmethyl (meth)acrylate represented by the general formula (2):

wherein R denotes hydrogen or a methyl group; glycidyl (meth)acrylate represented by the general formula (3):

wherein R denotes hydrogen or a methyl group; or a mixture thereof, and a (meth)acrylate monomer without an epoxy group (B) represented by the general formula (1):

wherein R denotes hydrogen or a methyl group.

2. The optical waveguide of claim 1 , wherein a formulation ratio of a (meth)acrylate monomer with an epoxy group (A) and a (meth)acrylate monomer without an epoxy group (B) is a molar ratio of 1:1-1:20.

3. The optical waveguide of claim 2 , wherein a weight-average molecular weight of the polymer is 50,000-500,000.

4. The optical waveguide of claim 1 , wherein a weight-average molecular weight of the polymer is 50,000-500,000.

5. A dry film comprising at least a carrier film and an uncured resin layer of an epoxy resin composition, which is formed as a film on the carrier film, wherein the epoxy resin composition contains a polymer comprising a (meth)acrylate monomer with an epoxy group (A) which is epoxycyclohexylmethyl (meth)acrylate represented by the general formula (2):

wherein R denotes hydrogen or a methyl group; glycidyl (meth)acrylate represented by the general formula (3):

wherein R denotes hydrogen or a methyl group; or a mixture thereof, and a (meth)acrylate monomer without an epoxy group (B) represented by the general formula (1):

wherein R denotes hydrogen or a methyl group.

6. The dry film of claim 5 , wherein a formulation ratio of a (meth)acrylate monomer with an epoxy group (A) and a (meth)acrylate monomer without an epoxy group (B) is a molar ratio of 1:1-1:20.

7. The dry film of claim 6 , wherein a weight-average molecular weight of the polymer is 50,000-500,000.

8. The dry film of claim 7 , wherein the epoxy resin composition contains 5-35 weight % of liquid epoxy resin with respect to the whole resin composition.

9. The dry film of claim 6 , wherein the epoxy resin composition contains 5-35 weight % of liquid epoxy resin with respect to the whole resin composition.

10. The dry film of claim 5 , wherein a weight-average molecular weight of the polymer is 50,000-500,000.

11. The dry film of claim 10 , wherein the epoxy resin composition contains 5-35 weight % of liquid epoxy resin with respect to the whole resin composition.

12. The dry film of claim 5 , wherein the epoxy resin composition contains 5-35 weight % of liquid epoxy resin with respect to the whole resin composition.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kondo Naoyuki
• Kurizoe Junko
• Hashimoto Shinji
• Nakashiba Toru

Classifications

• C08G59/1466

  Acrylic or methacrylic acids · CPC title

• G02B6/1221 Primary

  made from organic materials · CPC title

• C09D133/068

  containing glycidyl groups · CPC title

• G02B6/138

  by using polymerisation · CPC title

• Y10T428/31511

  Of epoxy ether · CPC title