| 摘要 |
PURPOSE: To prevent self-welding between an Ag electrode provided on the surface of a piezoelectric material substrate and a metallic terminal whose surface an Ag film brought into contact with this Ag electrode is provided on. CONSTITUTION: Fine particles 4 having a high melting point are stuck on oscillation electrodes 3 which are provided on front and rear faces of a piezoelectric material substrate 2 and consist of Ag. Ceramics such as an alumina, glass, Ni, Cr, W, Ti, Mo, Ni-Cu (monel), or alloys of these metals are used as materials of these fine particles 4. These fine particles 4 having a high melting point are stuck to or buried in the surface of the oscillation electrode 3 by the sand-blast method, the agitation method, or the like. |
