US Patent 7153043 Optical transceiver having improved printed circuit board

An optical transceiver includes a multi-layer printed circuit board comprising a plurality of layers and a first electric circuit and a flexible printed circuit board comprising a second electric circuit in connection with the first electric circuit. At least one of the layers is a rigid printed circuit board layer. A flexible printed circuit board is an extension of one of the layers in the multi-layer printed circuit board. An electro-optical component in communication with the first electric circuit and the second electric circuit can convert an electric signal to an optical signal or an optical signal to an electric signal.