Protected interconnect for solid state camera module
A camera module includes a solid state lens that flexes, in response to electrical signals. A lens barrel holds the lens on the optical axis. A lens barrel holder holds the lens barrel above an image sensor. The lens barrel holder includes electrically conductive interconnects between a bottom and a top end of the lens barrel holder. The conductive interconnects are not exposed to an exterior of the lens barrel holder. The camera module includes two or more respective lower electrically conductive connections in proximity to the interconnects and connecting the electrically conductive interconnects to respective conductors for the one or more electrical signals. The camera module includes two or more upper conductive connections configured to electrically connect the solid state lens to respective ones of the two or more conductive interconnects.
1. A camera module, comprising:
a solid state lens configured to flex, in response to one or more electrical signals;
a lens barrel configured to hold the solid state lens;
an image sensor below the lens barrel;
a lens barrel holder configured to hold the lens barrel above the image sensor, wherein the lens barrel holder comprises:
two or more electrically conductive interconnects configured to transmit the one or more electrical signals between a bottom end of the lens barrel holder and a top end of the lens barrel holder in proximity to the solid state lens, wherein the conductive interconnect is not exposed to an exterior of the lens barrel holder;
two or more lower electrically conductive connections in proximity to respective bottom ends of the conductive interconnects and connecting the electrically conductive interconnects to respective conductors for the one or more electrical signals; and
two or more upper electrically conductive connections configured to electrically connect the solid state lens to respective ones of the two or more conductive interconnects.
2. The camera module of claim 1 , wherein the two or more conductive interconnects comprise electrically conductive material on an inside surface of the lens barrel holder.
3. The camera module of claim 1 , wherein the two or more conductive interconnects comprise electrically conductive material inside a wall of the lens barrel holder, and wherein the two or more conductive interconnects are not exposed to an inner surface or an outer surface of the lens barrel holder.
4. The camera module of claim 1 , wherein the upper electrically conductive connections comprise electrically conductive material in holes, cavities, or depressions of the lens barrel holder.
5. The camera module of claim 1 , wherein the lower electrically conductive connections and the upper electrically conductive connections comprise electrically conductive solder.
6. The camera module of claim 1 , wherein the lower electrically conductive connections and the upper electrically conductive connections comprise electrically conductive adhesive.
7. The camera module of claim 1 , further comprising a protective ring positioned around an outer edge of the solid state lens, wherein the protective ring is part of the lens barrel or part of the lens barrel holder.
8. A multifunction device, comprising:
a central processing unit;
a system memory connected to the central processing unit; and
a camera module connected to the central processing unit, wherein the camera module comprises:
a solid state lens configured to flex, in response to one or more electrical signals;
a lens barrel configured to hold the solid state lens;
an image sensor below the lens barrel;
a lens barrel holder configured to hold the lens barrel above the image sensor, wherein the lens barrel holder comprises:
two or more electrically conductive interconnects configured to transmit respective ones of the one or more electrical signals between a bottom end of the lens barrel holder and a top end of the lens barrel holder in proximity to the solid state lens, wherein the conductive interconnect is not exposed to an exterior of the lens barrel holder;
two or more lower electrically conductive connections in proximity to respective ones of the conductive interconnects and connecting the electrically conductive interconnects to respective conductors for the one or more electrical signals; and
two or more upper electrically conductive connections configured to electrically connect the solid state lens to respective ones of the two or more conductive interconnects.
9. The multifunction device of claim 8 , wherein the two or more conductive interconnects comprise electrically conductive material on an inside surface of the lens barrel holder.
10. The multifunction device of claim 8 , wherein the two or more conductive interconnects comprise electrically conductive material in inside a wall of the lens barrel holder, and wherein the two or more conductive interconnects are not exposed to an inner surface or an outer surface of the lens barrel holder.
11. The multifunction device of claim 8 , wherein the upper electrically conductive connections comprise electrically conductive material in holes, cavities, or depressions in the lens barrel holder.
12. The multifunction device of claim 8 , wherein the lower electrically conductive connections and the upper electrically conductive connections comprise electrically conductive solder.
13. The multifunction device of claim 8 , wherein the lower electrically conductive connections and the upper electrically conductive connections comprise electrically conductive adhesive.
14. The multifunction device of claim 8 , wherein the camera module further comprises a substrate below the lens barrel, and wherein:
the substrate comprises a hole in the center of the substrate along the optical axis; and
the image sensor is flip chip mounted to an underside of the substrate.
15. A method of manufacturing a camera module, comprising:
forming a lens barrel configured to hold a solid state lens;
forming a lens barrel holder configured to hold the lens barrel above an image sensor;
forming, in the lens barrel holder, two or more electrically conductive interconnects configured to transmit one or more electrical signals between a bottom end of the lens barrel holder and a top end of the lens barrel holder, wherein the conductive interconnect is not exposed to an exterior of the lens barrel holder;
positioning respective ones of two or more lower electrically conductive connections in proximity to respective ones of the two or more conductive interconnects;
positioning respective ones of two or more upper electrically conductive connections in proximity to respective ones of the two or more conductive interconnects, wherein the two or more upper electrically conductive connections are configured to electrically connect a solid state lens to respective ones of the two or more conductive interconnects; and
positioning, at a top end of the lens barrel, the solid state lens.
16. The method of claim 15 , wherein forming the two or more conductive interconnects in the lens barrel holder further comprises adding electrically conductive material to the lens barrel holder with a laser direct structuring (LDS) process.
17. The method of claim 15 , wherein forming the two or more conductive interconnects in the lens barrel holder further comprises mechanically inserting electrically conductive material into two or more respective holes in the lens barrel holder.
18. The method of claim 15 , wherein forming the lens barrel holder further comprises:
inserting the two or more conductive interconnects into a mold of the lens barrel holder; and
injecting plastic into the mold around the two or more conductive interconnects.
19. The method of claim 15 , wherein the lower conductive connections and the upper conductive connections comprise electrically conductive solder.
20. The method of claim 15 , wherein the lower conductive connections and the upper conductive connections comprise conductive electrically adhesive.