Patent ID: 7513022

Claim:
A method for manufacturing a surface acoustic wave device to join a surface acoustic wave element having one principal surface formed with a connector electrode and a periphery sealing electrode to a base substrate formed with an element electrode for connection to the connector electrode, and a periphery sealing conductor for connection to the periphery sealing electrode, the method comprising the steps of: forming a first solder bump on either of the element electrode of the base substrate and the connector electrode of the surface acoustic wave element; forming a second solder bump having a height smaller than that of the first solder bump on either of the periphery sealing conductor of the base substrate and the periphery sealing electrode of the surface acoustic wave element; electrically connecting and temporarily fixing the element electrode of the base substrate to the connector electrode of the surface acoustic wave element by means of the first solder bump in atmospheric air; and thereafter in a nitrogen atmosphere fusing the first solder bump and the second solder bump in a predetermined atmosphere so that the periphery sealing conductor of the base substrate and the periphery sealing electrode of the surface acoustic wave element are hermetically sealed and joined to each other by the second solder bump.