| 摘要 |
PURPOSE:To improve the leading-out precision of electrodes and to form numbers of external electrodes of chip-shaped piezoelectric resonators by forming metallic films on the surface of a piezoelectric substrate, and then etching those metallic film and forming electrodes. CONSTITUTION:Insulating base materials 55 and 57 are adhered to main surfaces 51a and 51b of a piezoelectric substrate base material 51 respectively. Then, the piezoelectric substrate base material 51 and insulting base materials 55 and 57 are cut along lines l1, l1- which run in the centers of circu lar holes 53, 53- corresponding to lead-out electrodes to form a thin, long- sized unit 58. While this long-sized unit 58 is rotated, a metallic film 60 is formed over its entire surface by sputtering, vapor deposition, or a PVD method of ion plating, etc. Then, the long-sized unit 58 is cut along lines l2, l2- which cross the lengthwise direction of the unit 58 almost at right angles and dipped in solder to obtain chip- shaped filter. |
