| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible wiring board and its solder bonding method by which electrodes can be bonded to each other by solder without producing a corrosive gas, and to provide an optical transmitting package using the same. SOLUTION: The flexible wiring board 1 is comprised of a conductor 3 formed directly on a flexible heat-resistance insulation film 2, a wiring which is formed by covering such a film 41 as a nickel oxide film or the like on the conductor 3 that is difficult to be wetted by solder, and an electrode 5 which is formed by covering the surface of the wiring with such a film 51 that is easy to be wetted by solder such as gold or the like. COPYRIGHT: (C)2007,JPO&INPIT
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