Patent ID: 6760500
Filing Date: 2004-07-06
Classification: G02B,H01L

Abstract:
An optical wiring device, comprising:a first substrate; an integrated circuit disposed on the first substrate; a photoelectric conversion element provided on the first substrate and configured to convert between electrical signals and optical signals; an optical terminal opposing the photoelectric conversion element; a second substrate having a first optical wiring, and being attached to the first substrate with the optical terminal therebetween, the first optical wiring comprising a first clad layer and a first optical waveguide surrounded by the first clad layer; and a second optical wiring comprising a second clad layer and a second optical waveguide surrounded by the second clad layer, an end portion of the second optical wiring including a center part having a tapered form and an inverse-taper portion other than the center part, the center part of the end portion being thinner at an upper surface and side surfaces thereof than other portions of the second optical wiring which is different from the end portion, and the thickness of the inverse-taper portion of the end portion being uniform and smaller than the other portions, wherein a part of the first optical waveguide is not covered by the first clad layer so as to be exposed therefrom, the end portion of the second optical wiring is attached to the first optical wiring in a direction extending along the first optical waveguide at the exposed part of the first optical waveguide, and the center part of the end portion is aligned to the exposed part of the first optical waveguide, and wherein the electrical signals are transmitted between the photoelectric conversion element and the integrated circuit, the optical signals are transmitted between the photoelectric conversion element and the first optical wiring through the optical terminal, and the optical signals are transmitted between the first and second optical wirings through the part of the first optical waveguide to be exposed.