Patent ID: 8804368

Claim:
An electronic device, comprising: a first printed circuit board (PCB); a second PCB configured to be coupled to the first PCB; the first PCB having top and bottom surfaces and at least one component mounted to the top surface of the first PCB prior to the first PCB being coupled to the second PCB; the second PCB comprising a top surface and a bottom surface; the second PCB further comprising a through-hole extending between the top and bottom surfaces of the second PCB; wherein the first PCB is mounted in an inverted orientation with respect to the second PCB such that the top surface of the first PCB faces the top surface of the second PCB; and wherein the first PCB is aligned with the second PCB such that the component is substantially aligned with the through hole of the second PCB and is visible from the bottom surface of the second PCB; wherein the component comprises an optical device that operates in a line of sight through the second PCB toward the bottom surface of the second PCB.