JP2023148198A - Crystal vibration piece and crystal device - Google Patents

Abstract

To provide a crystal vibration piece with a novel structure that can improve the mounting accuracy on a container even though it is miniaturized and to provide a crystal device including the same.SOLUTION: A crystal vibration piece 10 includes a crystal piece 10a of a rectangular shape in plan view, a first excitation electrode 10b and a second excitation electrode 10c provided on a main surface opposite to the crystal piece, a first extraction electrode 10d extending from the first excitation electrode to one end side of one side 10aa of the crystal piece, and a second extraction electrode 10e extending from the second excitation electrode to the other end side of the one side. Planar shapes of portions 10da, 10ea that are portions of the first and second extraction electrodes along a first side on the same main surface of the crystal piece are made to be different from each other so that an image recognition unit of a mounting device used to mount the crystal vibration piece to a container can acquire a desired recognition pattern.SELECTED DRAWING: Figure 1

Description

The present invention relates to a crystal vibrating piece and a crystal device using the same, which can improve mounting accuracy in a container.

BACKGROUND ART One type of crystal resonator, which is a type of crystal device, includes a crystal vibrating piece that vibrates in a thickness-shear vibration mode and a container containing the crystal vibrating piece. The crystal vibrating piece includes a crystal piece, excitation electrodes provided on the front and back surfaces of the crystal piece, and an extraction electrode drawn out from the excitation electrode.
There is an increasing demand for miniaturization of such crystal resonators. As a result, crystal vibrating pieces and containers are becoming increasingly smaller. Therefore, unless the mounting accuracy when mounting the crystal resonator in the container is improved, the position of the crystal resonator with respect to the container will occur, resulting in a problem of deteriorating the electrical characteristics, shock resistance characteristics, etc. of the crystal resonator.

In order to reduce the above-mentioned problems, for example, in Patent Document 1, a pattern for positioning the crystal vibrating piece with respect to the container is provided on the crystal piece, separately from the excitation electrode, and using this positioning pattern, the crystal vibrating piece is moved. A technique for mounting on a container is described (Summary of Patent Document 1, FIG. 5, FIG. 7, etc.).

Japanese Patent Application Publication No. 2003-69370

However, as crystal resonators become smaller and crystal pieces become smaller, the area of the crystal piece becomes smaller and smaller, making it difficult to provide a positioning pattern on the crystal piece separate from excitation electrodes. .
On the other hand, it is also conceivable to use the excitation electrode itself as a positioning pattern. However, in that case, problems associated with miniaturization of the crystal resonator still occur. In other words, as crystal resonators become smaller, the nozzle that attracts the crystal resonator of the mounting device that mounts the crystal resonator in the container becomes larger than the planar shape of the excitation electrode, making it difficult to confirm the position of the crystal resonator. A part of the suction nozzle is included in the image of the excitation electrode (see FIG. 3), making it impossible to obtain accurate image information.
It is also conceivable to mount the crystal vibrating piece in the container by using an extraction electrode provided integrally with the excitation electrode on the crystal piece and reaching the end of the crystal piece as a positioning pattern. However, in that case, as will be described in detail later in a first comparative example (see FIG. 5), if the shape of the extraction electrode is simple, erroneous recognition will occur and mounting accuracy cannot be improved.

It is also conceivable to position the crystal vibrating piece in the container by recognizing the outer shape of the crystal piece itself. However, in that case, the following problem occurs, as will be explained in detail in a second comparative example described later. That is, in order to respond to the miniaturization of crystal pieces, the mainstream manufacturing method for crystal pieces uses a wafer method and photolithography technology. Therefore, a method is used in which a large number of crystal vibrating pieces are formed in a matrix on a crystal wafer, and each crystal vibrating piece is broken off from the crystal wafer and used as individual pieces. As a result, an irregularly shaped portion is generated in the broken-off portion of the crystal vibrating piece (see FIG. 6), which reduces the precision with which the crystal vibrating piece is positioned in the container.

On the other hand, other improvement measures can be considered, such as introducing a high-resolution image recognition section in the mounting device that mounts the crystal vibrating piece in the container, but the cost of introducing the device becomes a problem.
Each of the above-mentioned problems becomes more and more noticeable as crystal resonators become smaller. Specifically, in terms of crystal resonator package sizes, 1008 size (long side dimension is about 1 mm, short side dimension is about 0.8 mm), 0806 size (long side dimension is about 0.8 mm, short side dimension (approximately 0.6 mm) and become increasingly noticeable when manufacturing smaller crystal resonators.
This application was filed in view of the above points, and therefore, the purpose of this application is to provide a crystal resonator piece with a new structure that can improve mounting accuracy in a container even as crystal resonators become smaller. and to provide a crystal device using this.

In order to achieve this object, according to the present invention, a crystal piece having a rectangular shape in plan view, a first excitation electrode provided on a first main surface of the crystal piece, and a first excitation electrode opposite to the first main surface are provided. a second excitation electrode provided on a second main surface; a first extraction electrode extending from the first excitation electrode to one end side of the first side of the crystal piece; and from the second excitation electrode to the crystal piece. a second extraction electrode extending to the other end side of the first side;
The planar shapes of the portions of the first extraction electrode and the second extraction electrode that are along the first side and are on the same main surface of the crystal piece are determined by placing the crystal vibrating piece in a container. A feature is that the image recognition units of the mounting apparatuses used during mounting are different from each other so that a desired recognition pattern can be obtained.

In carrying out this invention, the length of the portion of the first extraction electrode along the first side in the direction parallel to the first side is defined as L1, and the length of the portion of the first extraction electrode along the first side is defined as L1, and When the length parallel to the first side of the part along the side is defined as L2, and the length of the first side is defined as L0 (see FIG. 1), it is preferable that L1>L2, In addition, L1 is preferably in the range of 0.25L0 to 0.5L0, more preferably 0.35L0 to 0.5L0. Further, it is preferable that L2=0.1L0 to 0.2L0.

Further, in implementing the present invention, the following configuration may be used. That is, a portion of the first extraction electrode along the first side is divided into a first portion parallel to the first side and located on the excitation electrode side, and a first portion parallel to this first portion and located on the excitation electrode side. It may have a stepped shape including a second portion located on the side side and shorter in length than the first portion (see FIG. 4).
In this case, when the length of the first part in the direction parallel to the first side is defined as L3, and the length of the second part in the direction parallel to the first side is defined as L4, L3 is For the length L0 of one side, L3 is preferably in the range of 0.4L0 to 0.65L0, more preferably in the range of 0.5L0 to 0.7L0. Further, it is preferable that L4 is in the range of 0.1L3 to 0.5L3 with respect to L3 (see FIG. 4).
In the case of a structure having a stepped shape, when the crystal vibrating piece is connected and fixed to the container with conductive adhesive, the conductive adhesive may wrap around from the side of the first side of the crystal piece to the surface side of the crystal piece. Even in this case, it is easy to avoid short-circuiting between the two extraction electrodes.

Further, a crystal device according to another invention of this application includes the above-described crystal vibrating piece according to the present invention, a container containing the crystal vibrating piece, and fixing means for connecting and fixing the crystal vibrating piece to the container. It is characterized by having the following.

According to the crystal vibrating piece of the present invention, the portions of the first extraction electrode and the second extraction electrode along the first side of the crystal piece, that is, the predetermined portions corresponding to the end sides of the first and second extraction electrodes, As mentioned above, since they have different predetermined shapes, the image recognition unit of the mounting device that mounts the crystal vibrating piece on the container has a better positioning pattern when mounting the crystal vibrating piece on the container than in the case where the crystal vibrating piece is not mounted. This makes it easier to extract patterns. Therefore, it is possible to realize a crystal vibrating piece with a novel structure that can improve mounting accuracy in a container.
Further, according to the crystal resonator of the present invention, the crystal vibrating piece is mounted in the container, with the predetermined portions corresponding to the end sides of the first extraction electrode and the second extraction electrode having different predetermined shapes. , a crystal resonator is obtained in which the crystal resonator piece is mounted in a predetermined positional relationship with respect to the container. Therefore, it is possible to provide a crystal resonator having desired electrical characteristics and impact resistance.

FIG. 1(A) is a plan view for explaining the crystal vibrating piece 10 of the first embodiment, and FIG. 1(B) is a sectional view thereof. FIG. 2 is a diagram for explaining an outline of a mounting apparatus 20 for mounting a crystal vibrating piece on a container. FIG. 3 is a diagram showing an image when the crystal vibrating piece 10 of the first embodiment is recognized by an image recognition unit of the mounting apparatus. FIG. 7 is a plan view for explaining a crystal vibrating piece 30 according to a second embodiment. FIG. 2 is an explanatory diagram of a first comparative example, in which FIG. FIG. 3 is a diagram showing an image recognized by an image recognition unit of the mounting apparatus. FIG. 3 is an explanatory diagram of a second comparative example, in which FIG. FIG. 3 is a diagram showing an image recognized by an image recognition unit of the mounting apparatus. FIG. 2 is a plan view and a cross-sectional view for explaining a crystal resonator 50 according to an embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a crystal vibrating piece and a crystal resonator of the present invention will be described with reference to the drawings. Note that the drawings used in the explanation are merely shown schematically to the extent that these inventions can be understood. Moreover, in each figure used for explanation, the same number is attached|subjected and shown about the same component, and the explanation may be abbreviate|omitted. Furthermore, the shapes, dimensions, etc. described in the following description are merely preferred examples within the scope of the present invention. Therefore, the present invention is not limited only to the following embodiments.

1. Description of embodiments of crystal vibrating piece The crystal vibrating piece of the present invention includes a crystal piece having a rectangular shape in plan view, a first excitation electrode provided on a first main surface of the crystal piece, and a first excitation electrode facing the first main surface. a second excitation electrode provided on a second main surface, a first extraction electrode extending from the first excitation electrode to one end of the first side of the crystal blank; The present invention relates to a crystal vibrating piece including a second extraction electrode extending from the electrode near the one side of the crystal piece to the other end of the side.
In the crystal vibrating piece of the present invention, the portions of the first extraction electrode and the second extraction electrode that are along the first side of the crystal piece and are on the same main surface of the crystal piece (hereinafter referred to as (sometimes abbreviated as "predetermined portion") have different planar shapes from each other so that the image recognition unit of the mounting device used to mount the crystal vibrating piece in the container can obtain the desired recognition pattern. It is characterized by:
Here, the predetermined portions of the first extraction electrode and the second extraction electrode are made different from each other so that the image recognition unit of the mounting device can acquire a desired recognition pattern. The purpose is to provide a recognition pattern that allows accurate judgment. Therefore, various modifications may be made as long as the above idea can be achieved, but in order to deepen the understanding, several embodiments will be described below along with comparative examples.

1-1. Crystal vibrating piece of the first embodiment FIG. 1(A) is a plan view for explaining the crystal vibrating piece 10 of the first embodiment, and FIG. 1(B) is taken along the line PP in FIG. 1(A). FIG.
This crystal vibrating piece 10 includes a crystal piece 10a that is square in plan view, a first excitation electrode 10b provided on a first main surface of the crystal piece 10a, and a first excitation electrode 10b provided on a second main surface opposite to the first main surface. a second excitation electrode 10c, a first extraction electrode 10d that extends from the first excitation electrode 10b to one end side of the first side 10aa of the crystal piece 10a, and A second extraction electrode 10e extending from the first side electrode 10c to the other end of the first side 10aa and near the first side 10aa.
Note that the ends of each of the first extraction electrode 10d and the second extraction electrode 10e are connected to the opposite side of the crystal piece 10a from the main surface where these ends of the crystal piece 10a are formed, via the side surface of the first side 10aa. It is routed around the main surface. Therefore, the ends of the first extraction electrode 10d and the second extraction electrode 10e have a similar shape and arrangement on the two main surfaces of the crystal blank 10a. This is because the crystal vibrating piece 10 can be mounted in the container without worrying about whether the crystal vibrating piece 10 is front or back.

In the case of the first embodiment, a predetermined portion of the first extraction electrode 10d and the second extraction electrode 10e along the first side 10aa of the crystal blank 10a and located on the same main surface of the crystal blank 10a. The planar shapes of the portions 10da and 10ea (hereinafter sometimes abbreviated as predetermined portions) are different as follows.
That is, the length of the portion along the first side 10aa of the predetermined portion 10da of the first extraction electrode 10d on the same main surface of the crystal blank 10a is defined as L1, and the length of the portion along the first side 10aa is defined as L1, and the length of the predetermined portion 10ea of the second extraction electrode 10e is defined as L1. When the length of the part along the first side 10aa of is defined as L2, and the length of the first side 10aa is defined as L0 (see FIG. 1(A)), L1>L2, and L1 = a dimension selected from 0.25L0 to 0.5L0, more preferably a dimension selected from 0.35L0 to 0.5L0, and L2 = a dimension selected from 0.1L0 to 0.2L0. be. If L1 exceeds 0.5L0, there is a risk that the first excitation electrode 10b and the second excitation electrode 10c will be short-circuited by the conductive adhesive used to connect and fix the crystal piece 10a to the container. Further, the first excitation electrode 10b and the second excitation electrode 10c may face each other at the extraction electrode, which is not preferable because unnecessary capacitance is generated. If L1 is smaller than 0.2L0, it is not preferable because it is difficult to differentiate between the predetermined portion 10da and the predetermined portion 10ea. If L2 is smaller than 0.1L0, the area required for adhesion with the conductive adhesive cannot be obtained, and if L2 is larger than 0.2L0, it is difficult to cause a difference between the predetermined portion 10da and the predetermined portion 10ea, so it is preferable. do not have.
Here, the crystal piece 10a vibrates in a thickness shear mode, and is typically an AT-cut crystal piece, but may also be a two-turn cut crystal piece, such as an SC cut.

The effects of the first embodiment are as follows.
A suitable crystal piece 10a to which the present invention is applied is small. Specifically, in the case of a so-called 1008 size crystal resonator in terms of the external dimensions of the crystal resonator container, the long side dimension of the crystal piece 10a is about 0.7 mm, and the short side dimension (the above L0 is 0.5 mm). In the case of a so-called 0806 size crystal resonator, the crystal piece 10a is small, with the long side dimension of the crystal piece 10a being about 0.6 mm and the short side size of about 0.4 mm. Since the crystal vibrating piece 10 is small in size, it is not easy to mount the crystal vibrating piece 10 in a desired position in the container, so the structure of the present invention is important.
In other words, if L1 and L2 are set as above, there is a long straight line part L1, so when this crystal vibrating piece 10 is recognized by an image recognition device, it will be recognized as compared to when L1 and L2 are not set as above. , the attitude state of the crystal piece 10a can be grasped more accurately than, for example, when L1=L2. Hereinafter, the effects of the present invention will be explained based on experimental results.

<Explanation of image recognition results>
Next, in order to deepen the understanding of the present invention, the results of an experiment in which the crystal vibrating piece 10 of the first embodiment was image-recognized by the image recognition section of the mounting apparatus will be explained.
FIG. 2 is a schematic diagram of the mounting apparatus. The mounting apparatus 20 includes a suction/transport mechanism section 20a that attracts and transports the crystal vibrating piece 10, and an image recognition section 20b that grasps the posture state of the crystal vibrating piece 10. The suction/conveyance mechanism section 20a is located on the upper side in the vertical direction, and the image recognition section 20b is located on the lower side in the vertical direction. Then, when the suction/conveyance mechanism unit 20a attracts the crystal vibrating piece 10 and conveys it above the image recognition unit 20b, the image recognition unit 20b recognizes the crystal vibrating piece 10 and grasps the posture state of the crystal vibrating piece 10. do. Then, depending on the posture, the suction/conveyance mechanism section 20a itself rotates in-plane so that the crystal vibrating piece 10 is in a predetermined position with respect to a crystal resonator container (not shown), and Place piece 10 in the container. Since a conductive adhesive is applied in advance to a predetermined position of the container, the first side 10aa portion of the crystal vibrating piece 10 is adhered to the container via the conductive adhesive.

FIG. 3 is a diagram showing an image of the crystal vibrating piece 10 recognized by the image recognition section shown in FIG. 2. As shown in FIG. In the recognized image, the convex portions 20x generated above and below the first excitation electrode 10b are images of the suction nozzle of the suction/transport mechanism section 20a of the mounting apparatus 20 shown in FIG. 2. That is, since the suction nozzle is larger than the excitation electrode 10b, a part of the image of the suction nozzle has entered the image of the excitation electrode 10b. It can be seen that if the excitation electrode itself is used as a positioning image, the image of the suction nozzle will be included in the image, and therefore the attitude of the crystal vibrating piece 10 cannot be accurately grasped. In contrast, in the case of the present invention, the reference line 20z for posture correction is extracted using the image area 20y of the predetermined portion 10da of the extraction electrode as the positioning pattern of the crystal vibrating piece 10 in the container. posture information can be obtained.

1-2. Crystal vibrating piece according to second embodiment Next, a second embodiment of the invention of a crystal vibrating piece will be described. FIG. 4 is a plan view for explaining the crystal vibrating piece 30 of the second embodiment.
The crystal vibrating piece 30 of the second embodiment differs from the crystal vibrating piece 10 of the first embodiment in the following structural parts.
That is, a portion of the first extraction electrode along the first side 30aa is divided into a first portion 30x1 parallel to the first side 30aa and located on the excitation electrode 10b side, and a first portion 30x1 parallel to the first portion 30x1 and located on the excitation electrode 10b side. The second portion 30x2 is located on the side of the first side 30aa and is shorter than the first portion 30x1, and has a stepped portion 30x.
In this case, when the length of the first portion 30x1 in the direction parallel to the first side 30aa is defined as L3, and the length of the second portion 30X2 in the direction parallel to the first side is defined as L4, then L3 is a dimension selected from the range of L3=0.5L0 to 0.7L0, more preferably a dimension selected from the range of 0.4L0 to 0.65L0, with respect to the length L0 of the first side. good. Further, L4 is a dimension selected from the range of L4=0.1L3 to 0.5L3 with respect to L3. The length of L4 to be shorter than L3 is preferably determined by taking into account the effect of preventing short circuits caused by the conductive adhesive surrounding it, which will be described later.
Further, when the length of the first portion 30x1 in the direction perpendicular to the first side 30aa is defined as L5, and the length of the second portion 30X2 in the direction perpendicular to the first side as L6, L6= Preferably, the dimensions are selected from the range of 0.2L5 to 0.8L5. By making the dimensions different in this way, it is easy to prevent a short circuit between the electrodes even if the conductive adhesive wraps around the first side 10aa of the crystal piece 10a. Note that it is preferable to decide how much shorter L6 should be compared to L5 by taking into consideration the amount of the conductive adhesive wrapped around the circumference and the like.

In the case of the crystal vibrating piece 30 of the second embodiment, since the length of the second portion 30x2 in the stepped shape portion 30x is short, a region 30y without an electrode is generated along the first side 30aa. Therefore, when a crystal vibrating piece is connected and fixed to a container with a conductive adhesive, even if the conductive adhesive wraps around from the side surface of the first side 30aa of the crystal piece to the surface side of the crystal piece 10a, there is no area where there is an electrode. Due to the action of 30y, it is easy to avoid a short circuit between the two extraction electrodes. Furthermore, since it has a stepped shape, it also has the advantage of making it easy to extract features during image recognition.
In addition, in the case of the crystal vibrating piece 10 of the first embodiment and the crystal vibrating piece 30 of the second embodiment, the excitation electrodes and extraction electrodes can be formed using well-known film forming techniques and photolithography techniques. The shape of each predetermined portion of the first extraction electrode and the second extraction electrode can be easily formed into a desired shape.

3. Explanation of Comparative Examples Next, several comparative examples will be explained to clarify the effects of the present invention.
(First comparative example)
FIG. 5(A) is a plan view of the crystal vibrating piece 100 of the first comparative example, and FIG. 5(B) is a plan view of the crystal vibrating piece 100 of the first comparative example when recognized by the image recognition unit 20b (see FIG. 2). It is a diagram showing an image.
The crystal vibrating piece 100 of the first comparative example has a predetermined portion 101 of the first extraction electrode along the first side 100a of the crystal piece, and a predetermined portion of the second extraction electrode along the first side 100a of the crystal piece. 103 have the same planar shape and size, and the dimensions La and Lb of each of these predetermined portions 101 and 103 in the direction along the first side 100a satisfy La≈Lb, and , with respect to the dimension L0 of the first side 100a, La≈0.3L0 and Lb≈0.3L0.
When the crystal vibrating piece 100 of this first comparative example is recognized by the image recognition unit 20b (see FIG. 2), the characteristic line 105 of the recognized image is influenced by the unfavorable shape of the predetermined portions 101 and 103, and the crystal vibrating piece 100 is 100 postures will not be shown accurately. That is, the reference line 105 for positioning does not accurately indicate the attitude of the crystal vibrating piece 100. As a result, when this crystal vibrating piece 100 is mounted on a container using the mounting apparatus 20 (see FIG. 2), the mounting will be misaligned.

(Second comparative example)
FIG. 6(A) is a plan view of the crystal vibrating piece 200 of the second comparative example, and FIG. 6(B) is a plan view of the crystal vibrating piece 200 of the second comparative example when recognized by the image recognition unit 20b (see FIG. 2). It is a diagram showing an image.
The crystal vibrating piece 200 of the second comparative example has irregularly shaped portions 201 that are formed when the crystal vibrating piece 200 is broken off from a crystal wafer (not shown) near both ends of the first side 200a. It is something that Note that the crystal vibrating piece 200 of the second comparative example is in a state in which the middle part of the extraction electrode is pulled out in an oblique direction from the excitation electrode, but this is due to the sample used in the experiment. Since it is not an essential part of the comparative example, it can be ignored.
When the crystal vibrating piece 200 of this second comparative example is recognized by the image recognition unit 20b (see FIG. 2), the recognized image features 203 are influenced by the shape of the irregular shaped portion 201, and the characteristics 203 of the crystal vibrating piece 200 are This will not accurately indicate your posture. As a result, when this crystal vibrating piece 200 is mounted on a container using the mounting apparatus 20 (see FIG. 2), the mounting will be misaligned.

4. Description of a crystal device according to an embodiment Next, an embodiment of a crystal device which is another invention of the present application will be described. This description will be made with reference to FIG. 7(A) is a plan view of a crystal resonator 50 as an example of the crystal device of the present invention, and FIG. 7(B) is a plan view of the crystal resonator 50 of the embodiment taken along the QQ line in FIG. 7(A). FIG.
The crystal resonator 50 of the embodiment is one in which the crystal resonator piece 10 of the first embodiment is mounted in a container 51 and connected and fixed to the container 51 using, for example, a conductive adhesive 60 as a fixing means.
Specifically, the container 51 is provided at a predetermined position in a recess 51a that is rectangular in plan view and encloses the crystal vibrating piece 10, a bank 51b surrounding the recess 51a, and a recess 51a on the bottom of the recess 51a. It is provided with a connection pad 51c and an external connection terminal 51d provided on the bottom surface of the back side of the container 51 for connection to an external device. Container 51 can be configured, for example, by a ceramic package.

The crystal vibrating piece 10 is fixed in the recessed portion of the container 51 with a conductive adhesive 60 in a positional relationship in which predetermined portions 10da and 10ea of the extraction electrodes correspond to the connection pads 51c. However, when manufacturing the crystal resonator 50, the crystal resonator piece 10 is mounted on the container 51 using a predetermined portion 10da of the extraction electrode. Therefore, the crystal vibrating piece 10 can be mounted in the container 51 with higher precision than when the predetermined portion 10da of the extraction electrode is not used.
A lid member 53 (see FIG. 7(B)) is joined to the bank portion 51b of the container 51 by a method depending on the sealing method, thereby hermetically sealing the crystal vibrating piece 10 inside the container 51. It has been done.
Since the crystal resonator 50 of the embodiment has the crystal resonator piece 10 mounted in the container 51 with high accuracy, desired electrical characteristics and shock resistance characteristics can be obtained even when the crystal resonator 50 is downsized. It is something.

In the description of the embodiment of the crystal device described above, an example was described in which a container having a concave portion was used. However, the container may include a flat base having a connection pad and a space in which the crystal vibrating piece 10 can be contained. A container having a structure including a cap-like lid member having a cap shape may also be used.
In addition, in the above description of the embodiment of the crystal device, a simple crystal resonator was given as an example, but the crystal device referred to in this invention also includes devices with other structures, such as a crystal device incorporating a temperature sensor. .

10: Crystal vibrating piece of the first embodiment 10a: Crystal piece 10aa: First side of crystal piece 10b: First excitation electrode 10c: Second excitation electrode 10d: First extraction electrode 10da: First extraction electrode Predetermined portion 10e: Second extraction electrode 10ea: Predetermined portion of the second extraction electrode L0: Length of the first side of the crystal piece L1: Predetermined length of the first extraction electrode L2: Predetermined portion of the second extraction electrode Length 20: Mounting device 20a: Adsorption/conveyance mechanism part 20b: Image recognition part 30: Crystal vibrating piece of the second embodiment 30aa: First side of crystal piece 30x: Stepped shape part 30x1: Stepped shape part 30x2: Second portion of the stepped portion 30y: Area without electrodes 50: Crystal device (crystal resonator) of the embodiment
51: Container 53: Lid member 60: Conductive adhesive

Claims (6)

A crystal piece having a square shape in plan view, a first excitation electrode provided on a first main surface of the crystal piece, and a second excitation electrode provided on a second main surface opposite to the first main surface, a first extraction electrode extending from the first excitation electrode to one end side of the first side of the crystal piece; and a second extraction electrode extending from the second excitation electrode to the other end side of the first side of the crystal piece. In a crystal vibrating piece comprising an extraction electrode,
The planar shapes of the portions of the first extraction electrode and the second extraction electrode that are along the first side and are on the same main surface of the crystal piece are determined by placing the crystal vibrating piece in a container. A crystal vibrating piece characterized in that the image recognition units of the mounting apparatus used during mounting are different from each other so that a desired recognition pattern can be obtained. A length of a portion of the first extraction electrode along the first side in a direction parallel to the first side is defined as L1, and a portion of the second extraction electrode along the first side. When the length parallel to the first side is defined as L2, the length of the first side is defined as L0, and the length of the first side is defined as L0,
The L1 and the L2 satisfy L1>L2, and the L1 has a dimension selected from the range of L1=0.25L0 to 0.5L0, and the L2 has a dimension L2=0.1L0 to 0.2L0. The crystal vibrating piece according to claim 1, having dimensions selected from the range of . A portion of the first extraction electrode along the first side,
a first portion parallel to the first side and located on the excitation electrode side;
a second portion parallel to the first portion, located on the first side side, and shorter in length than the first portion;
The length of the second portion is determined by the length of the first excitation electrode and the second excitation caused by the wrapping around the first side of the conductive adhesive used when fixing the edema vibrating piece to the container. 2. The crystal vibrating piece according to claim 1, wherein the first portion is shortened by a length that can prevent short circuit with the first electrode. The length of the first portion in the direction parallel to the first side is defined as L3, the length of the second portion in the direction parallel to the first side is defined as L4, and the length of the second portion in the direction parallel to the first side is defined as L4. When the length of the side is defined as L0,
The L3 is a dimension selected from the range of L3 = 0.5L0 to 0.7L0, and the L4 is a dimension selected from the range of L4 = 0.1L3 to 0.5L3 relative to the L3. The crystal vibrating piece according to claim 3, characterized in that: The crystal vibrating piece according to claim 1, wherein the crystal piece is an AT-cut crystal piece. A crystal vibrating piece according to any one of claims 1 to 5,
a container in which the crystal vibrating piece is mounted;
A crystal device comprising: fixing means for connecting and fixing the crystal vibrating piece to the container.

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