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Process for producing flexible optical waveguide

  • US 7,120,345 B2
  • Filed: 07/11/2005
  • Issued: 10/10/2006
  • Est. Priority Date: 07/12/2004
  • Status: Expired due to Fees
First Claim
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1. A process for producing a flexible optical waveguide which comprises the steps of:

  • immersing a substrate having an optical waveguide formed thereon in water to thereby reduce adhesion between the optical waveguide and the substrate and then peeling the optical waveguide from the substrate;

    temporarily bonding the peeled optical waveguide to a surface of a pressure-sensitive adhesive layer containing a foaming agent;

    cutting the temporarily bonded optical waveguide into a given length;

    allowing the foaming-agent-containing pressure-sensitive adhesive layer after the cutting step to foam by heating, thereby reducing adhesion between the foaming-agent-containing pressure-sensitive adhesive layer and the optical waveguide; and

    peeling the optical waveguide cut into the given length from the foamed adhesive layer.

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