JP2526665Y2 - Vibrating bar mounting and holding structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting and holding structure for a resonator element used for a surface mount type piezoelectric vibrator, a piezoelectric oscillator, a piezoelectric filter and the like.

[0002]

2. Description of the Related Art As electronic devices such as a camera-integrated VTR and a computer-related electronic device have been miniaturized, the circuit components constituting these electronic devices, especially the surface mount type circuit components, have been reduced in size and height. There is a need for reliability. Among such surface-mounted circuit components, there are circuit components such as a piezoelectric vibrator, a piezoelectric oscillator, and a piezoelectric filter in which a resonator element such as a crystal resonator is mounted.

In such a surface mount type piezoelectric vibrator, piezoelectric oscillator, piezoelectric filter, or the like, when a vibrating piece such as a crystal vibrator is mounted, one end of the vibrating piece is fixed to a substrate, and the other end is fixed. The holding is performed such that the free end is separated from the substrate. In that case, conventionally, for example, as shown in FIG. 6, a conductive adhesive 63 is provided on the electrode 62 on the substrate 61, and the vibrating piece 64 is held by the adhesive 63. That is, one end of the resonator element 64 is held by the adhesive 63, and the other end is separated from the substrate 61 so as to be a free end.

However, with such a structure, the resonator element 64
In the case of mounting and holding, the adhesive 63 is cured with the other end of the vibrating piece 64 at a predetermined distance by using, for example, a spacer 65 as shown in FIG.
To get rid of. For this reason, it is necessary to flatten the substrate 61 so that the spacer 65 can be easily moved.
There will be restrictions on the shape and the like of the substrate for sealing.
Further, when the spacer 65 is removed, there is a high possibility that the vibrating piece 64 may be damaged, and there is a problem in terms of workability during manufacturing, quality control, and the like. The present invention has been made in view of such points.

[0005]

The problems to be solved by the invention are that the conventional structure has limitations on the shape of the substrate and the like, and has problems in workability during production, quality control, and the like. It is.

[0006]

According to the present invention, there is provided a vibrating reed mounting and holding structure in which one end of a vibrating reed 4 is fixed to a substrate 1 and the other end is separated from the substrate 1 to be a free end. A step d is provided on the top, and the vibrating piece 4 is provided on the step d.
When the fixed end is supported by the substrate 1
Both sides are supported by the upper end of the step d, and one end of the vibrating reed 4 is fixed to the substrate 1, and the vibrating reed 4 is inclined and held on the substrate 1.
The vibrating reed mounting and holding structure is characterized in that the other end of the vibrating reed 4 is gradually separated from the substrate 1 by a step d so as to be a free end.

[0007]

According to this, the vibrating reed is held inclined by the step, and the other end thereof is separated from the substrate and becomes a free end. Therefore, it is not necessary to use a spacer or the like at the time of manufacturing, and therefore, the shape of the substrate can be reduced. There are no restrictions, and workability during manufacturing, quality control, and the like can be improved.

[0008]

FIG. 1 is a perspective view showing a structure of, for example, a surface mount type piezoelectric vibrator made by using a vibrating piece mounting / holding structure according to the present invention. In this figure, 1 is a substrate, 2
Denotes an electrode, 3 denotes a conductive adhesive, and 4 denotes a resonator element.

Here, the structure of the substrate 1 and the electrodes 2 excluding the adhesive 3 and the vibrating reed 4 is as shown in FIG. 2, for example. That is, the electrodes on the substrate 1 are separately formed into electrodes 2a and 2b, connected to the back surface of the substrate 1 through the through holes 5a and 5b, respectively, and further provided with terminal electrodes provided at both ends and end surfaces of the back surface of the substrate 1. 6a, 6b.

A step d is provided on each of the electrodes 2a and 2b. This step d is, for example, the electrode 2
After the thick films a and 2b are fired or the like, the protrusions forming the steps d are formed by thick film firing or the like by further changing the mask. One of the vibrating reeds 4 is provided on the protrusion formed in this manner.
Hold the fixed end, which is the end,
The end is a plane that is continuous with the step d of the electrodes 2a and 2b.
While supporting, the inside is supported by the upper end of the step d,
One end of the resonator element 4 is fixed to the substrate 1.

Therefore, in FIG. 1, this electrode 2 (2a,
2b) is provided with an adhesive 3 with one end of the vibrating reed 4 in contact with
When the adhesive 3 is cured, the vibrating reed 4 is inclinedly held on the substrate 1 by the step d, and the other end is gradually separated from the substrate 1 to become a free end. That is, FIG. 3 is a cross-sectional view. The vibrating reed 4 is held inclined by the step d of the electrode 2, and the adhesive 3 is cured in this state.

According to the structure described above, the vibrating reed 4 is held inclined by the step d, and the other end thereof is separated from the substrate 1 to be a free end. Therefore, it is not necessary to use a spacer or the like at the time of manufacturing. Therefore, there is no restriction on the shape and the like of the substrate 1, and workability during manufacturing, quality control, and the like can be improved.

In the structure of the above-described surface-mount type piezoelectric vibrator, for example, the overall shape of the component is, for example, 5 m in length.
m, a width of 3.2 mm, and a height of 1.5 mm. In this case, the distance between the other end of the resonator element 4 and the substrate 1 is 0.1 mm.
mm.

The distance at which the other end of the resonator element 4 is separated from the substrate 1 is determined by the height of the step d. The height of the step d can be accurately set by a technique such as thick film baking. Therefore, the distance at which the other end of the resonator element 4 is separated from the substrate 1 can be stably determined.

Further, in the above-described component, the step d provided on the electrode 2 may be formed on the substrate 1 in advance by a projection 1 corresponding to the step d, as shown in FIG.
1 may be provided and used as a step.

Further, the mounting and holding structure of the resonator element of the present invention is as follows.
The present invention is not limited to the above-described surface-mount type piezoelectric vibrator, and can be applied to a surface-mount type piezoelectric oscillator, a piezoelectric filter, or the like in which an IC 12 or the like is provided in a recess of the substrate 1 as shown in FIG.

[0017]

According to the present invention, the vibrating reed is inclined and held by the step, and the other end is separated from the substrate to be a free end. Therefore, it is not necessary to use a spacer or the like at the time of manufacturing, and therefore, the substrate is not required. There is no restriction on the shape and the like, and the workability during production, quality control, and the like can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an example of a structure for mounting and holding a resonator element according to the present invention.

FIG. 2 is a diagram for explaining this.

FIG. 3 is a cross-sectional view of an example of the mounting and holding structure of the resonator element according to the present invention.

FIG. 4 is a cross-sectional view of another example of the mounting and holding structure of the resonator element according to the present invention.

FIG. 5 is a perspective view of another example of the mounting and holding structure of the resonator element according to the present invention.

FIG. 6 is a view for explaining a conventional vibrating element mounting and holding structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2, 2a, 2b Electrode 3 Conductive adhesive 4 Vibrating piece 5a, 5b Through hole 6a, 6b Terminal electrode d Step 11 Convex part 12 IC

Claims (1)

(57) [Scope of request for utility model registration] 1. A one end of the resonator element is fixed to the substrate, the mounting holding structure of the vibrating element to a free end and a second end is separated from the substrate, a step is provided on the substrate, the resonator element to the step With
When the fixed end is supported by the substrate
The upper end of the step supports the inside of the vibrating piece and fixes one end of the vibrating piece to the substrate.
A vibrating bar mounting and holding structure, wherein the other end of the vibrating bar is gradually separated from the substrate by a step to become a free end.