JPS59101525U - surface acoustic wave resonator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figure 1 is a plan view showing a conventional surface acoustic wave resonator, Figure 2 is an enlarged schematic plan view showing a part of the surface wave reflective electrode in Figures 1, and Figure 3a is a conventional surface wave reflective electrode. FIG. 3 is an enlarged view of FIG. 3a, FIG. 4 is a schematic plan view showing an embodiment of the surface acoustic wave resonator of the present invention, and FIG.
6a to 6e are schematic plan views showing other embodiments of the auxiliary electrode in FIG. 4, and FIGS. 7a to 7e are partially enlarged views.
FIG. e is a schematic diagram for explaining the manufacturing process of FIG. 4.

Claims (2)

[Scope of utility model registration request] (1) Consisting of a portion of busbars that sandwich a row of strips disposed on one main surface of a piezoelectric substrate and arranged approximately parallel to each other at predetermined intervals, and electrically short-circuit the rows of strips by opposing each other. a plurality of comb-shaped electrodes comprising a plurality of surface wave reflecting electrodes, comb-teeth portions arranged approximately in rows between the plurality of surface wave-reflecting electrodes, and leads connected to the comb-teeth portions at approximately right angles; and interdigital electrodes that intersect with each other, the surface acoustic wave resonator comprising a plurality of auxiliary electrodes between the bus bar and the edge of the piezoelectric substrate. . (2) The surface acoustic wave resonator according to claim 1, wherein the auxiliary electrode is an extension of the strip row.