| 摘要 |
PURPOSE:To obtain a package for optical transmission-reception modules which can be automatically mounted and the circuit board of which can be miniaturized by fixing lead parts and connecting parts to the circuit board in a face- contact state. CONSTITUTION:Lead parts 4a and connecting parts 4b are formed into flat shape so that the parts 4a and 4b can be brought into face-contact with a circuit board 1 and, while the parts 4a are terminals for electrical connection, the parts 4a are subject to soldering and have certain degrees of mechanical strengths. The parts 4b having a larger contact area than the parts 4a have and provided on a connector 3 side of the parts 4a are mechanically strongly connected to the board 1 by soldering, but the parts 4b are provided at a location where stresses tend to concentrate when the connector 3 is inserted and removed. Therefore, the parts 4a and 4b can be automatically mounted on this module, because they are surface-mounted similarly to ordinary electronic parts and the module has a sufficiently high reliability against the mechanical stress applied to the mounting surface when the connector 3 is inserted and removed. In addition, the circuit board 1 can be miniaturized, since the number of required through holes can be reduced. |
