Patent ID: 8596885

Claim:
A flexible circuit assembly comprising: a flexible circuit, wherein the flexible circuit includes first and second opposite ends, a first major surface and a second major surface; a first alignment hole and a second alignment hole adjacent the first end; a fiber optic transmitter die and a fiber optic receiver die attached to the first major surface adjacent the first end; transmitter circuitry and receiver circuitry connected to the flexible circuit and electrically connected to the fiber optic transmitter die and the fiber optic receiver die, respectively; and at least one fiducial on the flexible circuit adjacent the first end positioned to locate the fiber optic transmitter die and the fiber optic receiver die on the flexible circuit, wherein the first end of the flexible circuit includes at least one solid section made of light transmissive material between the first major surface and the second major surface, the fiber optic transmitter die and the fiber optic receiver die each face a portion of the at least one solid section made of light transmissive material, and the light transmissive material of the respective portion is transparent to the respective wavelength of optical light transmitted from or received by the fiber optic transmitter die and the fiber optic receiver die so that optical signals can be transmitted and received through the surfaces of the flexible circuit.