| 摘要 |
A circuit board assembly includes a first circuit board, an optical transceiver, a second circuit board, and a number of light wave guides. The first circuit board includes a lower surface. The optical transceiver is mounted on the lower surface for sending and receiving light beams. The second circuit board is electrically connected to the first circuit board and includes a top surface facing the lower surface. The light wave guides are mounted on the top surface and optically coupled with the optical transceiver for transmitting the light beams.
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