Patent ID: 8175462
Filing Date: 2012-05-08
Classification: G02B,H01L

Abstract:
1. A fiber optic transceiver (FOT) module comprising: a leadframe comprising at least a plurality of I/O pins and a printed circuit board attachment area having an area less than a total area of the leadframe, each I/O pin having a proximal end and a distal end; a plurality of electrically conductive attachment devices, wherein respective ones of the electrically conductive attachment devices are positioned on respective ones of the distal ends of respective ones of at least some of the I/O pins of the leadframe, wherein at least one of the electrically conductive attachment devices comprises electrically conductive adhesive and is positioned on the printed circuit board attachment area of the leadframe; a printed circuit board (PCB) having at least an upper surface and a lower surface, the lower surface of the PCB having a plurality of electrically conductive attachment pads positioned thereon, one or both of the upper and lower surfaces of the PCB having a plurality of electrically conductive bond pads positioned thereon, wherein the electrically conductive attachment pads on the lower surface of the PCB are in contact with respective ones of the electrically conductive attachment devices positioned on the leadframe, wherein the contact between said electrically conductive attachment pads and said respective ones of the electrically conductive attachment devices operates to secure the PCB to the leadframe and to provide electrical connections between the leadframe and the PCB; at least a first integrated circuit (IC), at least a first optical active device, and at least a first passive device mounted on one or both of the upper and lower surfaces of the PCB; a plurality of bond wires, each bond wire having at least a first end and a second end, wherein the first ends of at least some of the bond wires are attached to electrically conductive contact pads of said at least a first IC and wherein the second ends of said at least some of the bond wires are attached to at least some of the electrically conductive bond pads of the PCB; and an encapsulation that encapsulates at least a portion of the leadframe to which the PCB is attached such that the encapsulation encapsulates at least the PCB, said at least a first IC, said at a first optical active device, and said at least a first passive device, and such that a major portion of the I/O pins including the proximal ends extends outside the encapsulation, and wherein the encapsulation has at least a first optical element formed therein at a location on the encapsulation for coupling light between said at least a first optical active device and a first end of a first optical waveguide.