Patent ID: 7869671

Claim:
The method of manufacturing a three-dimensional optical waveguide, the three dimensional optical waveguide including at least two optical waveguides, a first optical waveguide of the two optical waveguides guiding light emitted from a light source, and a second optical waveguide of the two optical waveguides guiding the light from the first optical waveguide toward a predetermined light receiving device, the method comprising: forming the first optical waveguide within a first glass substrate, the light emitted from the light source being guided through the first optical waveguide; forming the second optical waveguide within a second glass substrate, the light from the first optical waveguide being guided through the second optical waveguide; forming a lens on a third glass substrate, the lens focusing the light from the first optical waveguide toward the second optical waveguide, the light being guided from the light source to the predetermined light receiving device through the first glass substrate, the second glass substrate, and the third glass substrate; and laminating the third glass substrate between the first glass substrate and the second glass substrate, wherein a predetermined alignment mark is formed on the third glass substrate during forming of the lens on the third glass substrate, the predetermined alignment mark being utilized for aligning the lens with the first optical waveguide and the second optical waveguide when third glass substrate is laminated between the first glass substrate and the second glass substrate.