Material for substrate mounting optical circuit-electric circuit mixedly and substrate mounting optical circuit-electric circuit mixedly
View Patent ↗A material for an optical circuit-electrical circuit mixedly mounting substrate comprises a light permeable resin layer, and an optical circuit forming layer that is made of a light permeable resin of which refractive index increases (or decreases) when irradiated with an activating energy beam and is disposed adjacent to the light permeable resin layer, wherein a refractive index of a portion of the optical circuit forming layer is higher (or lower) than that of the light permeable resin layer when the material for the optical circuit-electrical circuit mixedly mounting substrate is irradiated with an activating energy beam so that said portion is irradiated.
1. A material for an optical circuit-electrical circuit mixedly mounting substrate comprising:
a light permeable resin layer,
a metal layer which is to be formed into an electrical circuit, 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 the light permeable resin layer is disposed between the metal layer and the optical circuit forming layer,
wherein 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,
a refractive index of the optical circuit forming layer is higher than that of the light permeable resin layer;
said portion of the optical circuit forming layer irradiated with the activating energy beam changes from a state of being removable by dissolving into a solvent to a state of being insoluble; and
the rest of the optical circuit forming layer that is not irradiated with the activating energy beam remains in the state of being removable by dissolving into the solvent.
2. The material for the optical circuit-electrical circuit mixedly mounting substrate according to claim 1 wherein an adhesive layer is provided adjacent to the metal layer and the adhesive layer is disposed between the metal layer and the optical circuit forming layer.
3. The material for the optical circuit-electrical circuit mixedly mounting substrate according to claim 1 further comprising a supporting member, wherein the supporting member constituting an exposed surface of the material for the optical circuit-electrical circuit mixedly mounting substrate on the side thereof nearer to the metal layer.
4. The material for the optical circuit-electrical circuit mixedly mounting substrate according to claim 1 further comprising a cover film, wherein the cover film constituting a surface of the material for the optical circuit-electrical circuit mixedly mounting substrate on the side thereof farther from the metal layer.