Electrical interconnects in an electronic contact lens
Ophthalmic lenses, including contact lenses may be enhanced through the incorporation of both active and passive electrical components. Electrical interconnects and die attachment configurations are required to ensure electrical connectivity between the components and the optic portion of the lens as well as providing a means for mounting planar devices on spherical surfaces. Electrical interconnects and die attachment for powered ophthalmic devices, including contact lenses includes realizing conductive traces on optical plastic, attaching planar dies to spherical surfaces and underfilling, overmolding and light blocking to complete the lens.
1. An ophthalmic lens assembly comprising:
a non-planar substrate;
a lens section formed in the non-planar substrate; and
one or more electronic components cooperatively associated with the lens section and mounted on the non-planar substrate, wherein one of the non-planar substrate and the one or more electronic components comprise mechanical mounting structures, configured to facilitate mounting planar structures to non-planar surfaces, and electrical interconnect structures for mounting the one or more electronic components to the non-planar substrate.
2. The ophthalmic lens assembly according to claim 1 , wherein the non-planar substrate comprises an optical grade plastic.
3. The ophthalmic lens assembly according to claim 1 , wherein the mechanical mounting structures comprise one or more stand-offs formed on the non-planar substrate, the one or more stand-offs being variably sized to create a planar mounting substrate for the one or more electronic components.
4. The ophthalmic lens assembly according to claim 3 , wherein at least one of the one or more stand-offs are at least partially coated with a conductive material.
5. The ophthalmic lens assembly according to claim 1 , wherein the mechanical mounting structures comprise one or more stand-offs formed on the one or more electronic components, the one or more stand-offs being variably sized to create a non-planar mounting surface for mounting the one or more electronic components to the non-planar substrate.
6. The ophthalmic lens assembly according to claim 5 , wherein at least one of the one or more stand-offs are at least partially coated with a conductive material.
7. The ophthalmic lens assembly according to claim 1 , wherein the mechanical mounting structures comprise one or more raised structures formed on the non-planar substrate, the one or more raised structures being variably sized to create a planar mounting substrate for the one or more electronic components.
8. The ophthalmic lens assembly according to claim 7 , wherein at least one of the one or more raised structures are at least partially coated with a conductive material.
9. The ophthalmic lens assembly according to claim 1 , wherein the mechanical mounting structures comprise one or more raised structures formed on the one or more electronic components, the one or more raised structures being variably sized to create a non-planar mounting surface for mounting the one or more electronic components to the non-planar substrate.
10. The ophthalmic lens assembly according to claim 9 , wherein at least one of the one or more raised structures are at least partially coated with a conductive material.
11. The ophthalmic lens assembly according to claim 1 , wherein the mechanical mounting structures comprise one or more planar reliefs formed in the non-planar substrate, the one or more planar reliefs being variably sized to create a planar mounting substrate for the one or more electronic components.
12. The ophthalmic lens assembly according to claim 11 , wherein at least one of the one or more planar reliefs are at least partially coated with conductive materials.
13. The ophthalmic lens assembly according to claim 1 , wherein the electrical interconnect structures comprise traces affixed to the non-planar
substrate, the traces being formed from a conductive material.