Optical structure
AssigneeInternational Business Machines Corporation
InventorKoji Masuda
Life of this patent
Estimating the term…
Abstract
An optical structure is presented. The optical structure includes a substrate including a cavity on a first surface of the substrate. The optical structure further includes an optical component on the substrate, the optical component including a second surface opposed to the first surface of the substrate. The optical structure also includes an adhesive in a gap between the first surface of the substrate and the second surface of the optical component affixing the optical component to the substrate, wherein at least one of the first surface of the substrate and the second surface of the optical component includes a predetermined portion arranged around the cavity, wherein the predetermined portion prevents the adhesive from infiltrating.
Claims13
An optical structure, comprising:
- a substrate including a cavity;
- an optical component on the substrate that transmits light into the cavity;
- and
- an adhesive in a gap between the substrate and the optical component affixing the optical component to the substrate, wherein a predetermined portion having a surface treated to provide less wettability to a liquid adhesive than other areas surrounding the predetermined portion, the predetermined portion arranged around the cavity prevents the adhesive from infiltrating the cavity.
An optical multi-chip module, comprising:
- a substrate including a waveguide core and a cavity, the waveguide core allowing a light to pass therethrough, the cavity being located on a first surface of the substrate to intersect the waveguide core, the cavity being filled with a gas;
- an optical component on the substrate that transmits light into the cavity, the optical component including a second surface opposed to the first surface of the substrate;
- and
- an adhesive in a gap between the substrate and the optical component due to capillary effect affixing the optical component to the substrate, wherein the adhesive is faulted around the cavity in a predetermined portion of the gap, the predetermined portion including a surface treated to provide less wettability to a liquid adhesive than other areas surrounding the predetermined portion.
A method for fabricating an optical structure, the method comprising:
- forming a substrate with a cavity;
- forming an optical component;
- providing a predetermined portion on at least one of the substrate and the optical component, the predetermined portion including a surface treated to provide less wettability to a liquid adhesive than other areas surrounding the predetermined portion;
- applying an adhesive between the substrate and the optical component so that the adhesive infiltrates into a gap between the substrate and the optical component;
- and
- preventing the adhesive from flowing into the cavity with the predetermined portion such that light from the optical component is transmitted into the cavity.
Dependencies are inferred from the claim text.