JPS6318176Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electrode structure of a thickness-shear resonator, such as an AT cut crystal resonator.

In recent years, in response to the demands of high-precision wristwatches, AT-cut thickness-slide crystal resonators have been attracting attention because of their excellent frequency-temperature characteristics and aging characteristics. Various support structures for vibrators have been proposed.

For example, in the support structure shown in FIG. Adhesives such as solder and conductive adhesive 4
By fixing the crystal piece 1 on the base 2,
Thereafter, a cap 5 shown by a two-dot chain line is press-fitted onto the outer periphery of the base 2, and the crystal blank 1 is hermetically sealed.

Although not shown, an insulating cushioning material made of Teflon or the like is interposed between the upper end of the crystal blank 1 and the inner surface of the cap 5 to improve impact resistance.
The crystal blank 1 can also be supported.

The electrode structure of the crystal blank 1 includes a pair of main electrodes 6, 6 provided on its main surface, and lead electrodes 7, 7 for joining the electrodes 6, 6 and lead terminals 3, 3, respectively. extends to one end of the crystal blank 1 on the fixed end side.

However, in a vibrator piece with such an electrode structure, the fixed end of the vibrator piece is limited to the end on the side where the lead electrode is provided, so in the process of mounting this vibrator piece on a base, The troublesome work of checking the direction of the transducer pieces each time or arranging the transducer pieces in a certain direction in advance is required, which makes the mounting process complicated and reduces the workability of transducer manufacturing and mass production. It has the disadvantage of being extremely poor in quality.

In order to eliminate the above-mentioned drawbacks, the present invention improves the electrode structure of the thickness-shear resonator, thereby simplifying the manufacturing process of the resonator, especially the mounting process, and creating a thickness-shear resonator that is highly workable and mass-producible. This is what we provide.

The present invention will be explained below based on the embodiments shown in FIGS. 2 and 3. Note that parts common to those in FIG. 1 are given the same reference numerals.

In Figures 2 and 3, the transducer piece 1 is AT
It is a cut-thickness shear vibrator piece, and has beveled portions B at both ends in the length direction, and has a pair of main electrodes 6a and 6b made of gold, silver, aluminum, etc. on its main surface. are doing. Further, this vibrator piece 1 has lead electrodes 7a, 7a of the main electrode 6a and a lead electrode 7 of the main electrode 6b at both ends in the length direction.
b and 7b are extended, respectively, so that a pair of lead electrodes 7a and 7b are formed at both ends of the vibrator piece 1, respectively. It is preferable that all of the lead electrodes 7a, 7b extend to the end faces of both ends in the length direction of the vibrator piece 1, since the lead electrodes 7a, 7b and the lead terminals can be more reliably joined. .

Note that the interval between the pair of lead electrodes 7a and 7b in plan view should be set in advance according to the interval between the lead terminals, for example, when the vibrator piece is directly fixed to the lead terminals on the base. Bye.

The thickness-shear vibrator of the present invention adopts the electrode structure described above, and a pair of lead electrodes are formed at both ends of the vibrator piece in the length direction. No matter which end in the horizontal direction is fixed, the main electrodes 6a, 6b are connected to the lead electrode 7.
It will be connected to the lead terminal on the base side via a and 7b. Therefore, the process of mounting the vibrator pieces is simplified and workability is improved, which is effective for mass production of thickness-shear vibrators.

The electrode structure of the present invention is not limited to the support structure shown in Fig. 1. One end of the vibrator piece is fixed or fixed to the base, and the lead electrode and lead are connected using solder, gold wire, conductive adhesive, etc. It is widely applied to thickness-shear vibrators of the type in which the vibrator piece is stood upright on a base, such as when connecting terminals.

Furthermore, the present invention is not limited to the above-mentioned embodiments; for example, it is possible to use a shear vibrator piece with a different thickness from an AT-cut crystal piece, or to use a convex-processed vibrator instead of a bevel-processed vibrator piece. Various changes, such as using a piece, can be made without departing from the gist of the present invention.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional support structure for a thickness-shear vibrator, FIG. 2 is a perspective view showing an example of the electrode structure of the present invention, and FIG. 3 is a plan view of FIG. 2. 1: Thickness shear vibrator piece, 3: Lead terminal,
6, 6a, 6b: main electrode, 7, 7a, 7b: lead electrode.

Claims (1)

[Scope of utility model registration request] In a thickness-shear oscillator having a pair of main electrodes on the main surface of a rectangular oscillator piece, two
At the same time, one lead electrode derived from the same main electrode is placed at one end in the length direction of the vibrator piece, and the other lead electrode is placed at the other end in the length direction of the vibrator piece. The electrode structure of a thickness-shear resonator is characterized in that each electrode is extended.