Patent ID: 8073295

Claim:
A material for an optical circuit-electrical circuit mixedly mounting substrate comprising: a light permeable resin layer; and an optical circuit forming layer that is made of a light permeable resin of which solubility to a solvent changes when irradiated with an activating energy beam and is disposed adjacent to the light permeable resin layer, wherein a refractive index of the optical circuit forming layer is higher than a refractive index of the light permeable resin layer; and when the activating energy beam is applied to the material for the optical circuit-electrical circuit mixedly mounting substrate so that a portion of the optical circuit forming layer is irradiated with the activating energy beam, said portion of the optical circuit forming layer irradiated with the activating energy beam changes from the state of not being removable by dissolving into a solvent to the state of being removable; and the rest of the optical circuit forming layer that has not been irradiated with the activating energy beam remains in the state of not being removable by dissolving into the solvent.