JPH06343020A - Piezoelectric resonance parts - Google Patents

Abstract

PURPOSE:To provide a piezoelectric resonance parts which can be easily thinned with high productivity and can suppress the characteristic variance caused by the positional shift of a contact point to obtain the fixed stable characteristic. CONSTITUTION:The piezoelectric resonators 21-24 function as the elements which use the surface expanding vibration modes. Each of terminal members 31-34 has a conduction pattern 301 formed on a flexible polymer substrate 300. The resonators 21-24 and the members 31-34 are put on each other to construct a ladder circuit and placed in an internal space 11 of a case 1. The resonators 21-24 are arranged with a space secured between their peripheries and the inner wall surface of the space 11. Then the members 31-34 are arranged so that a part of each pattern 301 touches the resonators 21-24 on the nodes produced on the surfaces of the resonators 21-24 and that the parts excluding the touching points are separate from the surfaces of the resonators 21-24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric resonance component used for a ladder type ceramic filter or the like.

[0002]

2. Description of the Related Art Piezoelectric resonance components of this type are disclosed, for example, in Japanese Utility Model Publications No. 4-119130, No. 5-4622 and No.
No. 4623 and Japanese Utility Model Laid-Open No. 5-4624 are disclosed. As a basic configuration, a plurality of piezoelectric resonators,
The piezoelectric resonator and the terminal member are stacked so as to form a ladder circuit, and the assembly thereof is arranged in the internal space of the case. Each of the piezoelectric resonators is a flat plate-shaped element that utilizes the surface-spreading vibration mode,
Each of the terminal members comes into contact with the piezoelectric resonator at a node generated on the surface of the piezoelectric resonator, and the portions other than the contact points are arranged apart from the surface of the piezoelectric resonator. The terminal member is made of a metal plate material and is formed in advance into a shape required for stacking and contacting with the piezoelectric resonator. When assembling into the case, after inserting the assembly in which the terminal member and the piezoelectric resonator are stacked in a predetermined positional relationship into the case, bend the external lead terminal part of the terminal member along the outer surface of the case and surface mount it. An external terminal suitable for the above is formed.

[0003]

The above-mentioned conventional piezoelectric resonance component should be improved in terms of further thinning, improvement in mass productivity, improvement in accuracy, and reduction of influence of solder heat during mounting. There is a point. For example, since the terminal plate is formed by bending the metal plate so as to be folded back, the thickness of the terminal plate is twice or more the plate thickness. Further, it is necessary to perform a pressing process or a bending process for forming a contact protrusion on one side or both sides of the metal plate. These processing steps are generally poor in mass productivity.
Further, the positional accuracy of the protrusion is determined by the accuracy of the pressing process and the bending process. If the accuracy of these steps deteriorates, the positional accuracy of the protrusions also deteriorates. If the position of the protrusion is incorrect,
In some cases, the contact point of the terminal plate is located on the node point of the piezoelectric resonator, and in some cases it is significantly deviated from the node point. These cause characteristic variations.

Further, since the terminal plate is made of a metal plate, it has high thermal conductivity. Therefore, the solder heat during surface mounting is easily transferred to the piezoelectric resonator through the terminal plate made of a metal plate, and the piezoelectric resonator may be thermally damaged.

Further, when the assembly of the terminal member and the piezoelectric resonator is housed in the case, it is necessary to bend the terminal member made of a metal plate along the outer surface of the case. At this point in time, since the terminal member and the piezoelectric resonator are already overlaid, the pressure applied during the bending process is applied to the piezoelectric resonator from the terminal member. As a result, cracks or breaks may occur in the piezoelectric resonator.

An object of the present invention is to provide a piezoelectric resonance component which can minimize the influence of the terminal member on the surface expansion vibration mode of the piezoelectric resonator.

Another object of the present invention is to provide a ladder-type piezoelectric resonance component in which a piezoelectric resonator is incorporated in a case without causing a characteristic change due to contact with the case.

A further object of the present invention is to provide a piezoelectric resonance component which can be easily thinned and has high mass productivity.

Still another object of the present invention is to provide a piezoelectric resonance component which suppresses characteristic fluctuation due to displacement of a contact point formed between a terminal member and a piezoelectric resonator and obtains a constant and stable characteristic. Is to provide.

A further object of the present invention is to provide a piezoelectric resonance component in which the piezoelectric resonator is less likely to be thermally damaged by solder heat or the like during mounting.

Still another object of the present invention is to provide a piezoelectric resonance component which is less likely to cause cracks or breaks in the piezoelectric resonator when the piezoelectric resonator and the terminal member are incorporated into the case.

[0012]

In order to solve the above problems, the present invention provides a piezoelectric resonance component including a case, a plurality of piezoelectric resonators, and a plurality of terminal members, wherein the case has an internal space. Each of the piezoelectric resonators is an element that utilizes a surface expansion vibration mode, and each of the terminal members is formed by forming a conductive pattern on a flexible polymer substrate. The piezoelectric resonator and the terminal member are arranged in the internal space so as to be stacked so as to form a ladder circuit, and the periphery of the piezoelectric resonator is spaced apart from the inner wall surface of the internal space. In the terminal member, a part of the conductive pattern contacts the piezoelectric resonator on a node generated on the surface of the piezoelectric resonator, and a portion other than a contact point is separated from the surface of the piezoelectric resonator. Is located in

[0013]

[Function] Each of the piezoelectric resonators is an element that utilizes the surface expansion vibration mode, and the terminal member contacts the piezoelectric resonator on a node where a part of the conductive pattern is formed on the surface of the piezoelectric resonator, and the contact point is Since the removed portion is arranged apart from the surface of the piezoelectric resonator, the influence of the terminal member on the surface expansion vibration mode of the piezoelectric resonator can be minimized.

The piezoelectric resonator and the terminal member are stacked to form a ladder circuit, and are arranged in the internal space such that at least the periphery of the piezoelectric resonator is spaced from the inner wall surface of the internal space. It is possible to obtain a ladder-type piezoelectric resonance component incorporated in a case without causing characteristic fluctuation due to contact with.

Since each of the terminal members is formed by forming a conductive pattern on the polymer substrate, it becomes extremely thin. Therefore, it is easy to reduce the thickness. When forming a contact point that contacts the piezoelectric resonator on a node generated on the surface of the piezoelectric resonator, the protruding contact point can be formed by selecting the thickness of the conductive pattern or bending the flexible polymer substrate.
There is no need to use press working, bending machining, etc.
Therefore, mass productivity is improved.

Since each of the terminal members uses the polymer substrate, the thermal conductivity is lower than that when the metal plate is used. Therefore, the piezoelectric resonator is less likely to be thermally damaged by the solder heat or the like during mounting.

Since the conductor pattern can be formed by printing, sputtering, vapor deposition or plating, or a combination thereof, the contact point with the piezoelectric resonator can be positioned with high precision. Therefore, it is possible to suppress the characteristic variation due to the displacement of the contact point and obtain a constant and stable characteristic. Since the polymer substrate forming the terminal member has flexibility, it can be bent by utilizing the flexibility. For this reason, cracks and breaks are less likely to occur in the piezoelectric resonator when it is incorporated into the case.

[0018]

1 is a partial sectional view of a piezoelectric resonance component according to the present invention, and FIG. 2 is a plan view showing the piezoelectric resonance component shown in FIG. 1 with a lid removed. Reference numeral 1 is a case, reference numeral 2
Reference numerals 1 to 24 are piezoelectric resonators, reference numerals 31 to 34 are terminal members, and 5 is a lid. The case 1 has an internal space 11.

Each of the piezoelectric resonators 21 to 24 is an element that utilizes a surface expansion vibration mode. More specifically, electrodes are provided on both surfaces of the piezoelectric ceramic body, and are polarized so that an electrostrictive phenomenon occurs in a diagonal direction when an electric field is applied between the electrodes. In the face-spreading vibration mode, a node is generated at the center of the plane of the piezoelectric ceramic body.

Each of the terminal members 31 to 34 has a piezoelectric resonator 2 on a node formed on the surface of the piezoelectric resonator 21 to 24.
1 to 24, and the portion other than the contact points is the piezoelectric resonator 21.
It is arranged so as to be separated from the plane of ~ 24. Each of the terminal members 31 to 34 is configured by forming the conductor pattern 301 on the flexible polymer substrate 300. The flexible polymer substrate 300 can be made of, for example, a polymer resin film having a thickness of about 100 μm. The conductor pattern 301 can be formed by printing, sputtering, vapor deposition or plating, or a combination thereof. Examples of such terminal members 31 to 34 include tabs (Tape Automated B
flexible wiring material called tape.

FIG. 3 is a front sectional view of the terminal members 31-34. As shown in the figure, the terminal members 31 to 34 have conductor patterns 301 on the front and back surfaces of the flexible polymer substrate 300.
And the conductor patterns 301-301 are electrically connected to each other by the penetrating conductor 302 penetrating the flexible polymer substrate 300. Protrusions 303 rising from the surface of the flexible polymer substrate 300 are provided on both sides of the through conductor 302. Such protrusions 303 can be formed by increasing the thickness of the conductor pattern 301 on both sides of the through conductor 302.

FIG. 4 is a front sectional view showing another embodiment of the terminal member. In this embodiment, the protrusion 303 is formed by bending the flexible polymer substrate 300.

FIG. 5 is an enlarged sectional view showing other details of the terminal member. In this embodiment, an electric resistor 304 is included. The resistor 304 is attached on the flexible polymer substrate 300 using the conductor pattern 301 to form a damping circuit for the ladder circuit.

Of the terminal members 31 to 34, the terminal member 31
Is bent so that the first contact portion 311 and the second contact portion 312 are formed by utilizing the flexibility of the polymer substrate 300. The first contact portion 311 and the second contact portion 312 each have a protrusion 303 at the center. The terminal members 32 to 34 have the contact portions 321 to 341 and the contact portion 321.
The projections 303 are provided on the surfaces of the surfaces ˜342. Of the terminal members 31 to 34, the terminal members 32 to 34 are drawn out of the case 1 and are used as terminal electrodes connected to an external circuit in surface mounting or the like.

Piezoelectric resonators 21 to 24 and terminal members 31 to 31
34 are overlapped so as to form a ladder circuit, and are arranged in the internal space 11 so that at least the periphery of the piezoelectric resonators 21 to 24 is spaced from the inner wall surface of the internal space 11. FIG. 6 is an electrical symbol diagram of the piezoelectric resonance component according to the present invention. Piezoelectric resonators 21 and 24 are series resonators,
The piezoelectric resonators 22 and 23 are parallel resonators, and the terminal member 32
Is used as an output terminal, the terminal member 33 is used as a ground terminal, and the terminal member 34 is used as an input terminal. Although not shown, the number, arrangement and size of the piezoelectric resonators are arbitrary. The same applies to the terminal member.

As described above, the piezoelectric resonators 21 to 24 and the terminal members 31 to 34 are stacked so as to form a ladder circuit, and at least the periphery of the piezoelectric resonators 21 to 24 is spaced from the inner wall surface of the internal space 11. Internal space 11 to separate
Since the piezoelectric resonators 21 to 24 and the terminal members 31 to 34 are arranged in the case 1, the ladder type piezoelectric resonance component can be obtained by incorporating the piezoelectric resonators 21 to 24 and the terminal members 31 to 34 in the case 1 without causing characteristic variations. To be

Each of the piezoelectric resonators 21 to 24 is an element utilizing the surface expansion vibration mode, and is composed of the terminal members 31 to 31.
34 contact each other at the nodes generated on the surfaces of the piezoelectric resonators 21 to 24, and the portion excluding the contact point P is the piezoelectric resonator 21.
˜24, the piezoelectric resonators 21-24
It is possible to minimize the influence of the terminal members 31 to 34 on the surface expansion vibration mode of.

Since each of the terminal members 31 to 34 is formed by forming the conductor pattern 301 on the polymer substrate 300, it becomes extremely thin. Therefore, it is easy to reduce the thickness. When a contact point that comes into contact with the piezoelectric resonators 21 to 24 is formed on a node generated on the surface of the piezoelectric resonators 21 to 24, it is projected by selecting the film thickness of the conductor pattern 301 or bending the flexible polymer substrate 300. Contact points can be formed. There is no need to use press working, bending machining, etc. Therefore, mass productivity is improved.

Since each of the terminal members 31 to 34 uses the polymer substrate 300, the thermal conductivity is lower than that when a metal plate is used. For this reason, the piezoelectric resonators 21 to 24 are less likely to be thermally damaged by solder heat or the like during mounting.

Since the conductor pattern 301 can be formed by printing, sputtering, vapor deposition or plating, or a combination thereof, the contact points with the piezoelectric resonators 21 to 24 can be positioned with high precision. Therefore, it is possible to suppress the characteristic variation due to the displacement of the contact point P and obtain a constant and stable characteristic. Polymer base 30 constituting terminal members 31 to 34
Since 0 has flexibility, it can be bent by utilizing flexibility. Therefore, when the piezoelectric resonators 21 to 24 are incorporated into the case 1, cracks and cracks are less likely to occur.

As the piezoelectric resonators 21 to 24, those of a normal type can be used, and as shown in FIG. 7, the electrodes 210 attached to the piezoelectric ceramic body 200 are made of Cu--Ni alloy, Ni--Cr. It is also effective to use an alloy or at least one of Cr-Si alloys. Electrodes made of these alloys have excellent oxidation resistance, sulfidation resistance and corrosion resistance,
There is no room for silver migration. Therefore, the electrodes 210 of the piezoelectric resonators 21 to 24 and the terminal member 3 are
It is possible to obtain a highly reliable piezoelectric resonance component in which poor contact is unlikely to occur between 1 and 34.

Further, the electrode 210 formed of at least one of Cu-Ni alloy, Ni-Cr alloy and Cr-Si alloy has an appropriate electric resistance value when used as a filter, so that the piezoelectric vibration is effective. Since the Q value of the child is lowered, the group delay characteristic can be improved. Therefore, the group delay characteristic can be improved without using a resistor.

FIG. 8 is a partial front sectional view of the piezoelectric resonance component according to the present invention, and FIG. 9 is a plan view of the same with the lid removed.
In the embodiment, the case 1 includes a plurality of terminal conductors 12-14.
Have. Each of the terminal conductors 12 to 14 is provided on the outer wall portion forming the internal space 11. Terminal member 31
Terminal members 32 to 34 to be led out to the outside
Are electrically connected to the terminal conductors 12 to 14 formed on the case 1. Specifically, the terminal member 32 is the terminal conductor 1.
2, the terminal member 33 is conductively connected to the terminal conductor 13, and the terminal member 34 is conductively connected to the terminal conductor 14. Therefore,
The terminal conductors 12 to 14 provided in the case 1 are the case 1
It functions as an external lead terminal portion for the terminal members 12 to 14 arranged inside.

In the embodiment, each of the terminal conductors 12 to 14 is attached to the outer surface of the outer wall portion forming the inner space 11. In addition, the terminal conductors 12 to 14 may be embedded inside the outer wall portion. Also, the internal space 1
1 is provided on the side where the opening faces the bottom portion, and the terminal conductors 12 to 14 are provided so as to reach the bottom portion from the end surface of the opening portion through the outer surface of the outer wall portion. Therefore, the piezoelectric resonance component shown in the embodiment can be used as a surface mount type.

The terminal conductors 12 to 14 are preferably composed of metal films. The metal film forming the terminal conductors 12 to 14 may include at least two layers. The first layer is a Ni layer and is attached to the surface of the case 1. The second layer is a metal layer having good solderability and is attached to the surface of the first layer. The second layer is at least one of Sn, solder or Au
It can consist of seeds. With such a structure, the second
It is possible to prevent solder erosion of the first layer, which is the Ni layer, while ensuring solderability by the layer. Alternatively, the first layer is N
A copper layer is included in addition to the i layer, and the copper layer is provided between the Ni layer and the case 1. With such a structure, the copper layer can reduce the electric resistance and the Ni layer can prevent the solder erosion phenomenon of the copper layer.

Although not shown, the terminal conductors 12 to 1
4 can also be formed by attaching a thin metal plate to the case 1 by means such as adhesion, or by embedding it in the outer wall of the case 1.

FIG. 10 is a partial sectional view of the piezoelectric resonance component according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 3 denote the same components. Piezoelectric resonator 21
~ 24 each have conductive protrusions 41-48 on the nodes that occur on the surface. Conductive protrusions 41-48
Is kept at the same potential as at least the surface of the electrode provided on the surface of the piezoelectric ceramic body. The illustrated conductive protrusions 41 to 4
Reference numeral 8 is a conductive resin attached to the surfaces of the piezoelectric resonators 21 to 24, for example, an epoxy-based conductive resin, and those obtained by applying and curing these conductive resins are generally used.

In each of the terminal members 31 to 34, the conductive pattern 301 is in contact with the conductive protrusions 41 to 48 at the contact point P, and the portions other than the contact point P are separated from the surfaces of the piezoelectric resonators 21 to 24. It is arranged.

With such a structure, the terminal members 31 to 31
It is not necessary to provide a protrusion on 34. Therefore, the terminal member 3
The structure of 1 to 34 is simplified, processing and assembly are easy, and cost is low.

Moreover, the elasticity of the conductive resin can be utilized to generate the required spring pressure between the piezoelectric resonators 21-24 and the terminal members 31-34.

FIG. 11 is a partial sectional front view showing another embodiment of the piezoelectric resonance component according to the present invention. Conductive protrusion 41
˜48 are formed by partially projecting the surfaces of the piezoelectric resonators 21 to 24. Therefore, it is not necessary to provide protrusions on the terminal members 31 to 34. Therefore, the terminal members 31 to 34
The structure of is further simplified.

FIG. 12 is a partial sectional view showing still another embodiment of the piezoelectric resonant component according to the present invention. Conductive protrusion 41
48 are formed by gradually increasing the thickness of the piezoelectric resonators 21 to 24 toward the central node.

FIG. 13 is a partial cross-sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention, and FIG. 14 is a plan view with the lid removed. In this embodiment, the positioning means 91-9
Have 4. The positioning means 91 to 94 are the piezoelectric resonators 2
The elastic resin or the foamable elastic resin is filled in the positions corresponding to the nodes generated in the peripheral portions of 1 to 24. As an example of such a resin, a silicon-based resin can be given. Since the illustrated piezoelectric resonators 21 to 24 have a rectangular shape, a total of four nodes are generated in the widthwise intermediate portion and the lengthwise intermediate portion of the piezoelectric resonators 21 to 24. The positioning means 91 to 94 are formed by applying an elastic resin or a foamable elastic resin to each of these nodes and curing it. It is desirable that the application width of the elastic resin or the expandable elastic resin be formed as narrow as possible within a range in which necessary mechanical strength can be secured.

Since the positioning means 91 to 94 are made of elastic resin or expandable elastic resin filled in the space, the elastic resin or expandable elastic resin is in close contact with the piezoelectric resonators 21 to 24 and the terminal members 31 to 34. , Piezoelectric resonators 21-2
4 and the terminal members 31 to 34 can be surely prevented from being displaced and illegally arranged.

Further, externally applied vibration and drop impact are absorbed by the elasticity of the elastic resin or foaming elastic resin which constitutes the positioning means 91-94, and the piezoelectric resonators 21-94.
It is possible to reliably prevent the positional deviation and the improper arrangement of the terminal 24 and the terminal members 31 to 34.

The positioning means 91 to 94 are the piezoelectric resonator 2
Since the filling is performed at the positions corresponding to the nodes generated in the peripheral portions of 1 to 24, the vibration disturbance to the piezoelectric resonators 21 to 24 by the positioning means 91 to 94 can be minimized.

FIG. 15 is a partial cross-sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention, and FIG. 16 is a plan view with the lid removed. The positioning means 91 to 93 are provided within the space along the stacking direction of the piezoelectric resonators 21 to 24 and the terminal members 31 to 34, including the positions corresponding to the nodes generated in the peripheral portions of the piezoelectric resonators 21 to 24. It is a protrusion. The positioning means 91 to 93 may be formed in the same body as the case 1, or may be a component separate from the case 1 and assembled at a predetermined position. Further, it is desirable that the width be formed as narrow as possible within a range in which necessary mechanical strength can be secured.

With the above structure, the positioning means 91-9
3, the piezoelectric resonators 21 to 24 and the terminal members 31 to 3
It is possible to surely prevent the positional deviation and the improper arrangement of No. 4. In addition, the positioning means 91-94 are provided with the piezoelectric resonators 21-24.
Since the piezoelectric resonator 21 is arranged at a position corresponding to a node generated in the peripheral portion of the piezoelectric resonator 21 by the positioning means 91 to 93.
Vibration disturbances to ~ 24 can be minimized.

FIG. 17 is a partial sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention, and FIG. 18 is a plan view with the lid removed. Of the plurality of piezoelectric resonators 21 to 24 provided, the piezoelectric resonators 21 and 24 are smaller in lateral width and vertical width than the piezoelectric resonators 22 and 23 by dimensional differences d1 and d2. Further, on the side facing the piezoelectric resonators 21 to 24 and the terminal members 31 to 34, step portions a and b having steps corresponding to the dimensional differences d1 and d2 of the horizontal width or the vertical width are provided. The steps a and b control the nodes generated on the surfaces of the piezoelectric resonators 21 to 24 in a direction in which the piezoelectric resonators coincide with each other. The positioning means 91 to 93 may be formed in the same body as the case 1, or may be a component separate from the case 1 and assembled at a predetermined position. Further, it is desirable that the width be formed as narrow as possible within a range in which necessary mechanical strength can be secured.

Of the plurality of piezoelectric resonators 21 to 24 provided, the piezoelectric resonators 21 and 24 are smaller than the piezoelectric resonators 22 and 23 in width and length by the dimensional differences d1 and d2. Depending on the size of the children 21 to 24, high selectivity can be achieved and group delay characteristics can be improved.

The positioning means 91 to 93 are the piezoelectric resonator 2
1 to 24 and the terminal members 31 to 34 along the stacking direction, the case 1, the piezoelectric resonators 21 to 24, and the terminal members 31 to 34.
And stepped portions a and b having a step corresponding to the dimensional differences d1 and d2 in horizontal and vertical widths are provided on the side facing the piezoelectric resonators 21 to 24 and the terminal members 31 to 34, respectively. ,
The step portions a and b control the nodes generated on the surfaces of the piezoelectric resonators 21 to 24 in a direction in which the piezoelectric resonators coincide with each other. , The nodes generated on the surfaces of the piezoelectric resonators 21 to 24 can be reliably matched.
Therefore, it is possible to prevent fluctuations in resonance impedance and generation of unnecessary vibration modes, and obtain desired characteristics. Further, the positioning means 91 to 93 prevent the piezoelectric resonators 21 to 24 and the terminal members 31 to 34 from being displaced due to vibrations applied from the outside or a drop impact, and the piezoelectric resonators 21 to 31.
It is possible to reliably prevent the positional deviation and the improper arrangement of the terminal 24 and the terminal members 31 to 34.

[0052]

As described above, according to the present invention, the following effects can be obtained. (A) It is possible to provide a piezoelectric resonance component that can minimize the influence of the terminal member on the surface expansion vibration mode of the piezoelectric resonator. (B) It is possible to provide a ladder-type piezoelectric resonance component in which the piezoelectric resonator is incorporated in the case without causing characteristic variations due to contact with the case. (C) It is possible to provide a piezoelectric resonance component which can be easily thinned and has high mass productivity. (D) It is possible to provide a piezoelectric resonance component in which characteristic fluctuation due to displacement of a contact point formed between a terminal member and a piezoelectric resonator is suppressed and constant and stable characteristics are obtained. (E) Piezoelectric resonators 21 to 24 due to solder heat or the like during mounting
It is possible to provide a piezoelectric resonance component that is less susceptible to thermal damage. (F) It is possible to provide a piezoelectric resonance component in which cracks and cracks are unlikely to occur in the piezoelectric resonator when the piezoelectric resonator and the terminal member are incorporated into the case.

[Brief description of drawings]

FIG. 1 is a partial front sectional view of a piezoelectric resonance component according to the present invention.

FIG. 2 is a plan view showing the piezoelectric resonance component shown in FIG. 1 with a lid removed.

FIG. 3 is an enlarged cross-sectional view showing details of a terminal member of the piezoelectric resonance component according to the present invention.

FIG. 4 is an enlarged cross-sectional view showing another detail of the terminal member of the piezoelectric resonance component according to the present invention.

FIG. 5 is an enlarged cross-sectional view showing another detail of the terminal member of the piezoelectric resonance component according to the present invention.

FIG. 6 is an electrical symbol diagram of the piezoelectric resonance component according to the present invention.

FIG. 7 is a front view of a piezoelectric resonator used in the piezoelectric resonance component according to the present invention.

FIG. 8 is a partial front sectional view showing another embodiment of the piezoelectric resonance component according to the present invention.

9 is a plan view showing the piezoelectric resonance component shown in FIG. 8 with a lid removed.

FIG. 10 is a partial front sectional view showing another embodiment of the piezoelectric resonant component according to the present invention.

FIG. 11 is a partial front sectional view showing another embodiment of the piezoelectric resonant component according to the present invention.

FIG. 12 is a partial front sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention.

FIG. 13 is a partial front sectional view showing still another embodiment of the piezoelectric resonant component according to the present invention.

FIG. 14 is a plan view showing the piezoelectric resonance component shown in FIG. 13 with a lid removed.

FIG. 15 is a front partial cross-sectional view showing still another embodiment of the piezoelectric resonance component according to the present invention.

16 is a plan view showing the piezoelectric resonance component shown in FIG. 15 with a lid removed.

FIG. 17 is a partial front sectional view showing still another embodiment of the piezoelectric resonant component according to the present invention.

FIG. 18 is a plan view showing the piezoelectric resonance component shown in FIG. 17 with a lid and a part of a terminal member removed.

[Explanation of symbols]

 1 Case 11 Internal Space 21-24 Piezoelectric Resonator 31-34 Terminal Member

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masanobu Sugimoto 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDK Corporation (72) Inventor Satoshi Satoshi 1-13-1 Nihonbashi, Chuo-ku, Tokyo TDC Within the corporation

Claims (7)

[Claims] 1. A piezoelectric resonance component including a case, a plurality of piezoelectric resonators, and a plurality of terminal members, wherein the case has an internal space, and each of the piezoelectric resonators has a surface. It is an element utilizing a spreading vibration mode, each of the terminal members is formed by forming a conductive pattern on a flexible polymer substrate, the piezoelectric resonator and the terminal member constitutes a ladder circuit Are arranged in the internal space so as to be overlapped with each other, the piezoelectric resonator is arranged with the periphery thereof being spaced from the inner wall surface of the internal space, and the terminal member has a part of the conductive pattern. A piezoelectric resonance component, which is arranged so as to come into contact with the piezoelectric resonator on a node generated on the surface of the piezoelectric resonator, and a portion other than a contact point is separated from the surface of the piezoelectric resonator. 2. The terminal member has the conductive pattern on the front surface and the back surface of the flexible polymer substrate at the contact point portion, and both conductive patterns penetrate the flexible polymer substrate. 2. The piezoelectric resonance component according to claim 1, wherein the piezoelectric resonance component is electrically connected to each other by a through conductor. 3. The piezoelectric resonance component according to claim 1, wherein the terminal member is led out of the case to form a terminal electrode. 4. The piezoelectric resonance component according to claim 1, wherein the terminal member has a protrusion at a portion of the contact point. 5. The piezoelectric resonance component according to claim 4, wherein the protrusion is formed by bending the flexible polymer substrate. 6. The piezoelectric resonance component according to claim 4, wherein the protrusion is formed by the conductive pattern. 7. The piezoelectric resonant component according to claim 1, further comprising an electric resistor, wherein the resistor is mounted on the flexible polymer substrate to form a damping circuit for the ladder circuit.