Patent ID: 6490400
Filing Date: 2002-12-03
Classification: G02B

Abstract:
An optical waveguide provided on a substrate, comprising:a core for transmitting light; and a clad formed around the core; wherein the clad is made of a fluorinated alicyclic structure containing polymer having a functional group; and wherein the core is made of a second polymer which is different from the fluorinated alicyclic structure-containing polymer of the clad; wherein said fluorinated alicyclic structure containing polymer is a perhalo compound having at least one of the following polymer units of formulae (1) to (4): wherein h is an integer of from 0 to 5, i is an integer of from 0 to 4, j is 0 or 1, h+i+j is from 1 to 6, s is an integer of from 0 to 5, t is an integer of from 0 to 4, u is 0 or 1, s+t+u is from 1 to 6, each of p, q and r which are independent of one another, is an integer of from 0 to 5, p+q+r is from 1 to 6, and each of R1 to R7 which are independent of one another, is a fluorine atom, a chlorine atom, a chlorodifluoromethyl group or a trifluoromethyl group.