Patent ID: 8120043

Claim:
A surface mount optical device, comprising: a ceramic package having a mounting surface and a cavity, the mounting surface located on an outside flat surface of the ceramic package, and the cavity including an opening and a bottom portion in the ceramic package; at least one chip-mounting pad disposed at the bottom portion in the cavity of the ceramic package; at least one conductor pattern located adjacent the at least one chip-mounting pad at the bottom portion in the cavity; at least one semiconductor optical chip having electrodes mounted on the at least one chip-mounting pad and located towards the opening of the cavity with respect to the chip mounting pad, and each of the electrodes being electrically connected to the at least one conductor pattern; two soldering pads located adjacent the mounting surface of the ceramic package, each of the two soldering pads electrically connected to a respective one of the electrodes of the at least one semiconductor optical chip via the at least one conductor pattern; and at least one dummy soldering pad electrically insulated from the electrodes of the at least one semiconductor optical chip, aligned with the two soldering pads on the mounting surface, and located at least one of, on either side of the two soldering pads on the mounting surface, and on one side of both of the two soldering pads on the mounting surface.