JPS6216573B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crystal resonator, and in particular, it is an object of the present invention to provide a crystal resonator that has a structure that is easy to manufacture and has a high mechanical strength.

Most conventional crystal oscillators have a structure in which the crystal oscillator is held by wire springs, so the manufacturing method thereof requires a large amount of manual labor and is not suitable for mass production. Furthermore, since it has a wire holding structure, its mechanical strength is also poor. Furthermore, when fine-tuning the frequency of a crystal vibrating body, a very cumbersome manufacturing method was used in which a mask was attached to each crystal vibrating body, adjustment was made by adding electrode material, and then the mask was removed. . On the other hand, a crystal resonator with a structure in which the crystal resonator is fixed to a flat plate requires a spacer or something equivalent to protect the vibration of the crystal resonator, and since it is attached to a flat plate, it is necessary to position the crystal resonator. It was difficult.

The crystal resonator according to the present invention solves the above-mentioned drawbacks of conventional products by directly attaching the crystal resonator to a terminal board for holding the crystal resonator and providing a recess.

Examples thereof will be described in detail below.

FIG. 1A is a front view of the crystal vibrating body 100,
Figure B is a side view thereof. This consists of a rectangular plate-shaped crystal vibrating element 1 and circular electrodes 2 and 3 formed on its main surface so as to sandwich the crystal vibrating element 1 therebetween.
and lead electrodes 4 and 5 which are conductively connected to these and formed so as not to face each other. The shape of the crystal vibrating element 1 is not limited to the rectangular plate shown in the figure, but may be other shapes such as a circular plate.

FIG. 2A is a front view of the terminal board 200, FIG. 2B is a side view thereof, and FIG.
FIG. 3 is a sectional view taken along line J'. This is insulating substrate 1
1 and lead terminals 12 and 13 are integrally molded, and a rectangular recess 16 is provided on one main plane of the insulating substrate 11 to house the crystal vibrating body 100 shown in FIG.
A portion of the lead terminals 12 and 13 are exposed along the recess 16 on the main surface of the insulating substrate 11 as fixed terminals 14 and 15 that are conductively fixed to the lead-out electrodes 4 and 5 shown in FIG. ing.

FIG. 3A shows the crystal resonator 100 connected to the terminal board 200.
This is a front view when it is installed in the same figure B.
FIG. The crystal vibrating body 100 is housed so that one main surface thereof faces the bottom surface of the recess 16 and is not exposed from the main surface of the insulating substrate 11, and the extraction electrodes 4 and 5 are fixed terminals 14 and 5, respectively. 15 with conductive adhesives 21 and 22, for example.

A crystal resonator having such a holding structure has the following advantages compared to a crystal resonator having a conventional structure.

(a) It is easy to hold the crystal vibrating body, which is particularly advantageous when the crystal vibrating body is small and thin.

(b) Since the entire crystal vibrating body is housed in a recess on the terminal board, there is no need for a special spacer to protect its vibration.

(c) Since the crystal resonator is directly attached to the terminal board,
It has superior mechanical strength compared to crystal resonators with a wire holding structure.

(d) By matching the shape of the recess to the shape of the crystal vibrating body, positioning of the crystal vibrating body is very easy.

4 to 7 show other examples of terminal boards with slightly different shapes from the terminal board 200, and the same components as those in FIGS. 2 and 3 are given the same numbers. . 4A is a front view of the terminal board 300, FIG. 4B is a side view thereof, and FIG. 4C is a front view of the terminal board 300.
FIG. This consists of a terminal board 200 and fixed terminals 14 and 1 shown in FIG.
They have the same structure except for 5. In this embodiment, the fixed terminals 31 and 32 are exposed on the bottom surface of the recess 16. According to this terminal board 300, the lead terminal 1
There is no need to bend the lead terminals when integrally molding 2, 13 and the insulating substrate 11. Figure 5 A is the first
The crystal resonator 100 shown in the figure is connected to the terminal board 300 shown in FIG.
This is a front view when it is installed in the same figure B.
FIG. The extraction electrodes 4 and 5 of the crystal vibrating body 100 are fixed to fixed terminals 31 and 32 within the recess 16 using conductive adhesives 21 and 22. According to this terminal board 300, the second
In addition to the same advantages as the terminal board 200 shown in the figure, the lead terminals are not exposed on the main plane of the insulating board and are flat, which is advantageous when sealing the recess 16.

6 and 7 show still other embodiments, FIG. 6A is a front view of the terminal board 400, FIG. 6B is a side view thereof, and FIG.
FIG. 3 is a sectional view taken along line N'. This has the same structure as shown in FIG. 4 except for the terminal board 300 and fixed terminals 31 and 32. That is, the fixed terminals 41 and 42 are provided on the bottom surface of the recess 16 so that only the surfaces thereof are exposed without exposing the entire thickness of the fixed terminals 41 and 42. Figure 7A shows the crystal oscillator 1 in Figure 1.
00 is attached to the terminal board 400 of FIG. 6, and FIG. 6B is a sectional view taken along the line O-O' of FIG. 6A. The extraction electrodes 4 and 5 of the crystal vibrating body 100 are fixed to fixed terminals 41 and 42 within the recess 16 using conductive adhesives 21 and 22. Such a terminal board 400 is similar to the terminal board 2 of FIG. 2 as described above.
In addition to the same advantages as the terminal board 300 of FIG. 00 or FIG. 4, one main surface of the crystal vibrating body 100 is stably held because it is in contact with the bottom surface of the recess 16, and has excellent mechanical strength.

8 to 10 show embodiments of the crystal resonator of the present invention, and the same components as those in FIGS. 1 to 7 are given the same numbers.
FIG. 8A is a front view of the crystal resonator, and FIG. 8B is a sectional view taken along line P-P' in FIG. 8A.
This crystal resonator includes a crystal resonator 100, a terminal board 4
00, and an insulating flat plate 51 that protects the crystal vibrating body 100, seals the recess 16, and is bonded to the insulating substrate 11. The flat plate 51 may be made of a resin material or the like, and its size needs to be larger than the area of the recess 16 . The method for bonding the flat plate 51 may be, for example, adhesive, ultrasonic bonding, heat bonding, or the like. Further, the terminal board 400 may be the terminal board 200 or 300 described above, and in either case, the crystal vibrating body 100 is protected and sealed by the flat plate 51.

FIG. 9A is a front view of a crystal resonator according to another embodiment, and FIG. 9B is a sectional view taken along the line QQ' in FIG. 9A. This crystal resonator includes an insulating cap 61 that seals the entire terminal board 400 and the crystal resonator 100 except for a portion 63 of the lead terminals, and is bonded to the insulating board 11. The cap 61 may be made of a resin material or the like, and the inner hole of the cap 61 needs to be the same size or larger than the terminal board 400. Further, the cap 61 may be bonded to the insulating substrate 11 by, for example, an adhesive, ultrasonic fusion, heat fusion, or the like, and the terminal substrate 400 may be the terminal substrate 200 or 300 described above. According to the two crystal oscillators described above, the crystal oscillator 100 can be sealed without requiring a special spacer to protect the vibration of the crystal oscillator 100. Furthermore, since it is easy to seal in a vacuum or in a nitrogen atmosphere, a highly reliable crystal resonator can be obtained.

10A is a partially sectional front view of the crystal resonator, and FIG. 10B is a sectional view taken along line RR' in FIG. 10A. This crystal resonator includes a crystal resonator 100, a terminal board 400, an insulating film 71 that protects the recess 16 and is fixed to the insulating board 11, and a resin 73 that covers the entire area except for a portion 72 of the lead terminal.
It consists of The insulating film 71 is made of adhesive 7, for example.
4, it may be fixed to the insulating substrate 11. Terminal board 4
00 may be the terminal board 200 or 300.

Next, terminal boards in which other functions are added to the terminal boards 200, 300, and 400 will be explained. 11th
The figure shows a case where this is implemented on a terminal board 400, for example. Components that are the same as those in FIGS. 2 to 7 are given the same numbers. 11A is a front view of the terminal board 500, FIG. 11B is a side view, and FIG. 11C is a sectional view taken along line S-S' in FIG. 11A.
This has the same structure as the terminal board 400, but a through hole 81 is newly provided at the bottom of the recess 16. Through hole 81
needs to be the same size or smaller than the electrodes 2 and 3 of the crystal vibrating body 100. FIG. 12A is a front view of the crystal vibrating body 100 attached to the terminal board 500, and FIG. 12B is a sectional view taken along line T-T' in FIG. 12A. In this state, using the through hole 81 as a mask, the crystal vibrating body 1 is
00 frequency can be finely adjusted. Crystal vibrator 10
It is important that one electrode 3 is attached so as to face the through hole 81 at the bottom of the recess 16. According to this method, the frequency can be finely adjusted without changing the capacitance between the electrodes 2 and 3 of the crystal vibrating body 100 when adding electrode material. Such an integrated crystal vibrating body 100 and terminal board 500 can be sealed by the methods shown in FIGS. 8 to 10, although the shape is slightly different. For example, the first
Figure 3 shows an example of this. FIG. 13A is a front view of the crystal resonator, and FIG. 13B is a front view of the crystal resonator, and FIG.
FIG. 3 is a cross-sectional view taken along the −U′ line. This crystal resonator includes an insulating flat plate 91 that protects the crystal resonator 100, the terminal board 500, and the crystal resonator 100, seals the recess 16, and adheres to the insulating substrate 11, and seals the through hole 81 for insulation. It is composed of an insulating flat plate 92 bonded to the substrate 11. flat plate 91,9
2 may be bonded by adhesive, ultrasonic melting point, heat fusion, etc., and thereby the crystal vibrating body 10
0 is completely sealed.

Similarly, the present invention can be applied to the case where a plurality of crystal vibrating bodies 100 shown in FIG. 1 are attached to the same terminal board. FIG. 14 to FIG. 16 show an embodiment in which two crystal vibrators are attached to the same terminal board. FIG. 14A is a front view of a terminal board 600 to which two crystal vibrating bodies 100 can be attached, and FIG. 14B is a sectional view taken along line V-V' in FIG. 14A. This consists of an insulating substrate 101, lead terminals 102 and 103, and a common lead terminal 10.
4 is integrally molded, and has two recesses 105 and 106 on one main plane of the insulating substrate 101 that can accommodate the crystal vibrating body 100 shown in FIG. Through holes 111, 112
A portion of the lead terminals 102, 103 and the common lead terminal 104 are each attached to a fixed terminal 10.
7, 108, 109, 110 as recess 105,
Only the surface is exposed at the bottom of 106. 15th
In Figure A, the crystal vibrating body 10 of Figure 1 is mounted on a terminal board 600.
FIG. 2 is a front view when two 0s are attached, and FIG. B is a sectional view taken along the line W-W' in FIG. A. One crystal vibrator 100 has lead electrodes 4 and 5
are connected to the fixed terminals 107 and 109 in the recess 105, and the lead electrodes 4 and 5 of the other crystal vibrating body 100 are connected to the fixed terminals 108 and 110 in the recess 106 using conductive adhesives 113, 114, 115, and 116, for example. is fixed. At this time, the crystal vibrating body needs to be attached so that one electrode 3 faces the through holes 112 and 113. This terminal board 6
00 can be sealed in the same manner as the terminal board described above. FIG. 16 shows an example of this. FIG. 16A is a front view of the crystal vibrating body, and FIG. 16B is a front view of the crystal vibrating body.
FIG. This crystal resonator consists of two crystal resonators 100, a terminal board 600, an insulating flat plate 121 which is adhered to an insulating substrate 101 with the recesses 105 and 106 sealed, and a through hole 1.
11 and 112 and a flat plate 122 that is adhered to the insulating substrate 101. A crystal resonator in which a plurality of such crystal resonators are attached to the same terminal board has the following advantages in addition to the advantages of the crystal resonator described above.

(a) Compared to crystal oscillators held by wire springs, the crystal oscillator can be held on the same plane, making it easier to increase the number of elements.

(b) Lead terminals can be shared, simplifying the structure.

As explained above, in the present invention, a crystal vibrating body having electrodes facing each other on the main surface of the crystal vibrating body and extraction electrodes not facing each other is an insulator having a concave portion dimensionally larger than the outline dimension of the crystal vibrating body. The board and the lead terminals are integrally molded and are fixed in the recesses of the terminal board, with a portion of the lead terminals exposed from the insulating board. A crystal resonator with such a structure not only has greater mechanical strength than a wire holding structure because the crystal resonator is directly attached to the terminal board, but also has recesses that facilitate the placement of the crystal resonator. , and plays a role in protecting the vibration of the crystal oscillator. Moreover, it is possible to provide a crystal resonator that is easy to manufacture, has stable performance, and has high industrial value.

[Brief explanation of the drawing]

1A and 1B are a front view and a side view showing an embodiment of a crystal vibrating body used in a crystal oscillator according to the present invention, and FIGS. 2A, B, and C are a front view and a side view of a terminal board, 3A and 3B are front views and sectional views of the main part of the terminal board with the crystal vibrating body attached, FIGS. 4 and 6 similarly show other terminal boards, and FIGS. FIG. 7 is a configuration diagram of a crystal oscillator installed in the same manner, FIGS.
10 is a configuration diagram showing another embodiment, and FIG. 11 is a configuration diagram showing another embodiment.
Figures A, B, and C are front views, side views, and sectional views of main parts showing other terminal boards, Figure 12 is a configuration diagram of the one with a crystal oscillator attached, and Figure 13 is the configuration of the completed crystal oscillator. Figure, Figure 14, Figure 15, Figure 16
The figure is a configuration diagram showing still another embodiment. 100...Crystal vibrating body, 1...Crystal vibrating element,
2, 3... electrode, 4, 5... extraction electrode, 20
0,300,400,500,600...terminal board, 11,101...insulating board, 12,13,1
02,103,104...Lead terminal, 14,1
5, 31, 32, 41, 42, 107, 108,
109,110...Fixed terminal, 16,105,1
06... recess, 81, 111, 112... through hole.

Claims (1)

[Scope of Claims] 1. An insulating substrate having a concave portion on one main plane and a plurality of conductive lead terminals, a part of the lead terminals being exposed on the main plane with the concave portion to form a fixed terminal. A terminal board formed by forming a terminal board, electrodes facing each other on the main surface of a crystal vibrating element through this element, and extraction electrodes formed to be conductively connected to each of the electrodes and not to face each other. a crystal vibrating body having a crystal vibrating body, one main surface of the crystal vibrating body facing a bottom surface of the recess, and the crystal vibrating body being housed in the recess and being exposed from a main plane of the insulating substrate. A crystal resonator characterized in that the crystal resonator and the terminal board are integrated by arranging the lead electrodes so as not to be connected to each other and conductively fixing the extraction electrodes to the fixing terminals. 2. The crystal resonator according to claim 1, wherein the fixed terminal of the lead terminal is disposed at the bottom of the recess. 3. The crystal resonator according to claim 2, wherein only the surface of the fixed terminal of the lead terminal is exposed. 4. An insulating flat plate having an area larger than the area of the recess is fixed to the insulating substrate such that the main plane of the flat plate faces the main plane of the insulating substrate and the entire recess is sealed. A crystal resonator according to claim 1, 2, or 3. 5. Claims 1 and 2, characterized in that an insulating cap is fixed to the insulating substrate so as to cover the entire terminal board and the crystal vibrating body except for a portion of the lead terminal. Or the crystal oscillator described in item 3. 6. An insulating film having an area larger than the area of the recess is fixed to the insulating substrate so that one side of the insulating film faces the main plane of the insulating substrate and covers the entire recess, and the lead terminal is 4. A crystal resonator according to claim 1, wherein the terminal board, the crystal resonator, and the insulating film, except for a portion thereof, are all sealed with a resin material. 7 The bottom of the recess has a through hole that is the same as or smaller in size than the electrode of the crystal vibrating body, and the crystal vibrating body is arranged at the bottom of the recess so that one of the electrodes faces the through hole. A crystal resonator according to claim 1, 2, or 3, characterized in that: 8. The crystal resonator according to claim 7, wherein an insulating flat plate is fixed to the insulating substrate so as to seal each of the recess and the through hole. 9. The crystal resonator according to claim 7, wherein an insulating cap is fixed to the insulating substrate by covering the entire terminal board and the crystal resonator except for a portion of the lead terminals. . 10 An insulating film is fixed to the insulating substrate by covering the entire recess and the through hole, respectively, and
Claim 7, characterized in that the terminal board, the crystal vibrating body, and the entire insulating film except for a part of the lead terminal are sealed with a resin material.
Crystal oscillator described in section.