Opto-electronic modules including electrically conductive connections for integration with an electronic device
View Patent ↗Opto-electronic modules include conductive wiring and connections that can facilitate integrating the modules into an external device. Some opto-electronic modules include an opto-electronic stack that includes at least one lens and an opto-electronic element. Conductive paths can extend from the bottom to the top of the module. The conductive paths can include conductive pads on the surface of the opto-electronic element, as well as wiring at least partially embedded in a substrate and walls of a housing for the opto-electronic stack. Conductive connections can be disposed between a top surface of the substrate and the bottom surface of the walls such that the conductive connections electrically connect the second wiring to the first wiring and to the conductive pads on the surface of the opto-electronic element. The modules can be fabricated, for example, in wafer-level processes so that multiple opto-electronic modules can be manufactured at the same time.
1. An opto-electronic module comprising:
an opto-electronic stack including at least one lens and an opto-electronic element, wherein the opto-electronic element has conductive pads on its surface;
a housing including a substrate and walls, the walls laterally surrounding the at least one lens such that at least a portion of the at least one lens and the walls have an intersecting plane in common, the intersecting plane being parallel to the substrate
wherein the substrate includes a first wiring, at least a portion of which is embedded within the substrate and which extends from a top surface of the substrate to a bottom surface of the substrate,
wherein the walls include a second wiring, at least a portion of which is embedded within the walls and which extends from a bottom surface of the walls to a top surface of the walls, and
wherein there is a hollow space between the at least one lens and the walls that include the second wiring;
the module further including conductive connections disposed between a top surface of the substrate and the bottom surface of the walls, wherein the conductive connections electrically connect the second wiring to the first wiring and to the conductive pads on the surface of the opto-electronic element.
2. The opto-electronic module of claim 1 wherein the conductive connections comprise an anisotropic conductive material.
3. The opto-electronic module of claim 2 wherein the anisotropic conductive material comprises anisotropic conductive film, epoxy, paste or adhesive.
4. The opto-electronic module of claim 1 wherein the first and second wirings include plated through-holes, respectively, in the substrate and the walls.
5. The opto-electronic module of claim 1 wherein a portion of the first wiring is present on the bottom surface of the substrate, the module further including one or more solder balls on the portion of the first wiring that is on the bottom surface of the substrate.
6. The opto-electronic module of claim 1 wherein a portion of the second wiring is present on the top surface of the walls.
7. The opto-electronic module of claim 1 wherein the substrate and walls are composed of a printed circuit board material.
8. The opto-electronic module of claim 1 wherein the substrate and walls are composed of a ceramic or fiberglass material.
9. A method of fabricating opto-electronic modules, the method comprising:
attaching a plurality of opto-electronic stacks to a first substrate, wherein each opto-electronic stack includes at least one lens and an opto-electronic element, and wherein at least a portion of each opto-electronic stack fits within a respective through-hole in the first substrate, wherein the opto-electronic element has conductive pads on its top surface, and wherein the first substrate includes first wirings, at least a portion of each first wiring being embedded within the first substrate and extending from a bottom surface of the first substrate to a top surface of the first substrate, wherein each of the conductive pads of the opto-electronic elements is connected to a portion of a respective one of the first wirings at the bottom surface of the first substrate;
attaching a second substrate at the bottom surface of the first substrate, wherein the second substrate includes second wirings, at least a portion of each second wiring being embedded within the second substrate and extending from a bottom surface of the second substrate to a top surface of the second substrate, wherein a portion of each of the second wirings at the top surface of the second substrate is connected to a portion of a respective one of the first wirings at the bottom surface of the first substrate through a respective conductive connection; and
separating the attached first and second substrates into a plurality of opto-electronic modules.
10. The method of claim 9 including providing an adhesive material to bond together the bottom surface of the first substrate with the top surface of the second substrate.
11. The method of claim 10 including providing an adhesive material to bond together the upper surface of the second substrate and a lower surface of the opto-electronic element in each opto-electronic stack.
12. The method of claim 9 wherein each conductive connection comprises an anisotropic conductive material.
13. The method of claim 12 wherein the anisotropic conductive material comprises anisotropic conductive film, epoxy, paste or adhesive.
14. The method of claim 9 wherein each conductive connection comprises an conductive elastomer strip.
15. The method of claim 9 wherein the first and second wirings include plated through-holes, respectively, in the first and second substrates.
16. The method of claim 9 wherein the first and second substrates are composed of a printed circuit board material.
17. The method of claim 9 wherein the first and second substrates are composed of a ceramic or fiberglass material.
18. A method of fabricating opto-electronic modules, the method comprising:
attaching a plurality of opto-electronic stacks to a first printed circuit board, wherein each opto-electronic stack includes at least one lens and an opto-electronic element, and wherein at least a portion of each opto-electronic stack fits within a respective opening in the first printed circuit board, wherein the opto-electronic element has conductive pads on its top surface, and wherein the first printed circuit board includes first wirings, at least a portion of each first wiring being embedded within the first printed circuit board and extending from a bottom surface of the first printed circuit board to a top surface of the first printed circuit board, wherein each of the conductive pads of the opto-electronic elements is connected to a portion of a respective one of the first wirings at the bottom surface of the first printed circuit board by way of anisotropic conductive film material;
attaching a second printed circuit board at the bottom surface of the first printed circuit board, wherein the second printed circuit board includes second wirings, at least a portion of each second wiring being embedded within the second printed circuit board and extending from a bottom surface of the second printed circuit board to a top surface of the second printed circuit board, wherein a portion of each of the second wirings at the top surface of the second printed circuit board is connected to a portion of a respective one of the first wirings at the bottom surface of the first printed circuit board by way of anisotropic conductive film material; and
dicing the attached first and second printed circuit boards into a plurality of opto-electronic modules.
19. The method of claim 18 wherein the first and second wirings include plated through-holes, respectively, in the first and second printed circuit boards.
20. The method of claim 18 wherein each opto-electronic stack includes a lens stack, the method including inserting the lens stack into a respective one of the openings in the first printed circuit board so that an end of the lens stack is near the top surface of the first printed circuit board.
21. A method of fabricating opto-electronic modules, the method comprising:
attaching a plurality of opto-electronic stacks to a first substrate, wherein each opto-electronic stack includes at least one lens and an opto-electronic element, wherein the first substrate includes first wirings, at least a portion of each first wiring being embedded within the first substrate and extending from a bottom surface of the first substrate to a top surface of the first substrate, wherein the opto-electronic element has conductive pads on its top surface; and
attaching a second substrate at the top surface of the first substrate, wherein at least a portion of each opto-electronic stack fits within a respective through-hole in the second substrate, wherein the second substrate includes second wirings, at least a portion of each second wiring being embedded within the second substrate and extending from a bottom surface of the second substrate to a top surface of the second substrate, wherein each of the conductive pads of the opto-electronic elements is connected to a portion of a respective one of the second wirings at the bottom surface of the second substrate, and wherein a portion of each of the first wirings at the top surface of the first substrate is connected to a portion of a respective one of the second wirings at the bottom surface of the second substrate through a respective conductive connection; and
dicing the attached first and second substrates into a plurality of opto-electronic modules.
22. The method of claim 21 wherein the conductive connections comprise an anisotropic conductive material.
23. The method of claim 22 wherein the anisotropic conductive material comprises anisotropic conductive film, epoxy, paste or adhesive.
24. The method of claim 21 wherein the first and second wirings include plated through-holes, respectively, in the first and second substrates.
25. The method of claim 21 wherein the first and second substrates are composed of a ceramic or fiberglass material.
26. The method of claim 21 wherein the opto-electronic stack comprises a lens array having a least one lens aligned with respect to a photodiode and having at least one lens aligned with respect to a light emitting diode.
27. The method of claim 21 wherein the opto-electronic stack includes a lens stack that extends above the top surface of the second substrate, the method including:
electrically coupling an electronic device to the lens stack for controlling a function of the lens stack, wherein the electronic device is disposed over the top surface of the second substrate and is electrically coupled to the second wiring at the top surface of the second substrate.
28. The method of claim 21 wherein the opto-electronic stack includes an array camera.
29. The opto-electronic module of claim 1 wherein the opto-electronic stack is disposed on a top surface of the housing substrate.
30. The opto-electronic module of claim 1 wherein the opto-electronic stack includes a lens stack comprising a plurality of lenses stacked one above the other.