JPH01208008A - Resonator and its manufacture and method for adjusting frequency characteristic in resonator - Google Patents

Abstract

PURPOSE:To perform the adjustment of a resonance frequency by constituting a device in such a way that a resonator formed in laminate structure is divided between a resonator main body and a shield electrode layer, and an adhesive layer is inserted between them. CONSTITUTION:On the resonator, a protection layer 1, a shield electrode layer 2, a sheet layer 3 consisting of a dielectric or an insulator, a back electrode layer 4, a dielectric layer 5, a sheet layer 7 similar to the layer 3, the adhesive layer 30, a sheet layer 21 similar to the layer 3, a shield electrode layer 22, and a protection layer 23 are provided in sequence as the above from the lowest layer side. Those layers 1-7 are formed integrally, and a first division block which constitutes the resonator is the block 10, and the layers 4-6 constitute the resonator main body. Also, the layers 21-23 are formed integrally, and it is a second block 20 to constitute the resonator. Those blocks 10 and 20 are integrated via the adhesive layer 30. By constituting the resonator in such way, the resonance frequency can be adjusted by varying the thickness of the layers 3, 7, and 21 and the layer 30.

Description

[Detailed Description of the Invention] The present invention relates to a resonator whose main structure is a resonator body in which conductive patterns are formed on both sides of a layered dielectric, a method for manufacturing the same, and a frequency in the resonator. Concerning how to adjust characteristics.

As one of the above-mentioned resonators, FIG. 6 (partially cutaway front view) and FIG. 7 (cross-sectional view taken along the line ■-■ in FIG. 6)
As shown in FIG. 1, U-shaped conductive patterns 123 and 124 are formed on the front and back surfaces of the dielectric substrate 120 obtained by firing, respectively.
After soldering the external lead terminal 121,
There is one manufactured by immersing the lead terminal 121 except for the protruding portion in an insulating resin bath to form a resin film 122. A resonator having such a structure has been proposed by the present applicant in Japanese Patent Application No. 1987-097313. still,
This electrical effect will be explained in Examples.

Light ■ , for example, there was a problem in that it was difficult to adjust the resonance frequency.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a resonator whose frequency characteristics can be adjusted, a method of manufacturing the same, and a method of adjusting the frequency characteristics of the resonator.

i, for “゛”.

The resonator according to the present invention includes a resonator body in which a predetermined conductive pattern is formed on both sides of a dielectric layer, and a pair of sheet layers made of a dielectric or an insulator provided on both sides of the resonator body. , comprising a resonator main body and a pair of shield electrode layers provided on both sides with the pair of sheet layers in between, in a stacked state, and a space between one or both of the pair of shield electrode layers and the resonator main body is divided. and multiple split pro-
It is characterized by an adhesive layer interposed between the blocks to integrate each dividing block.

The present invention also provides a resonator body, a pair of sheet layers made of a dielectric or an insulator provided on both sides of the resonator body, and both sides of the resonator body and the pair of sheet layers sandwiched therebetween. A method for manufacturing a resonator comprising a pair of shield electrode layers provided in a laminated state, the method comprising firing a plurality of resonators divided between one or both of the pair of shield electrode layers and a resonator body. The method is characterized in that already divided blocks are prepared or manufactured in advance, and an adhesive layer is interposed between each divided block to integrate the divided blocks.

Furthermore, the method for adjusting frequency characteristics in a resonator according to the present invention includes a resonator main body in which a predetermined conductive pattern is formed on both sides of a dielectric layer, and a dielectric or insulator provided on both sides of the resonator main body. A pair of sheet layers consisting of a resonator body and a pair of shield electrode layers provided on both sides of the resonator body and the pair of sheet layers are stacked in a stacked state, and the resonator body resonates with one or both of the pair of shield electrode layers. A method for adjusting frequency characteristics in a resonator in which the resonator is divided from the resonator body, and an adhesive layer is interposed between a plurality of divided blocks to integrate each divided block, the method comprising: An adhesive layer is interposed between a plurality of divided blocks formed by dividing between one of a pair of shield electrode layers and the resonator body and/or between the other of a pair of shield electrode layers and the resonator body. A method for adjusting the frequency characteristics of a resonator in which each divided block is integrated by changing the thickness of at least one of the pair of sheet layers and/or the adhesive layer, the shield electrode layer The separation distance between the resonator body and the resonator body is adjusted, thereby adjusting the frequency characteristics of the resonator body.

The present invention comprises a resonator main body, a pair of sheet layers, and a pair of shield electrode layers in a laminated state, and is divided between the resonator main body and the shield electrode layer, and is bonded between the resonator main body and the shield electrode layer. Since it has a structure in which layers are interposed, the separation distance between the resonator body and the shield electrode layer can be adjusted by changing the thickness of the sheet layer and the thickness of the adhesive layer, which contributes to adjusting the frequency characteristics.

Figure 1 is an external perspective view showing an embodiment of the product of the present invention, Figure 2 is a sectional view (front view) taken along line ■-■ in Figure 1, and Figure 3 is a cross-sectional view of Figure 2. FIG. 3 is a cross-sectional view (plan view) taken along line III-III. The resonator according to the present invention has 11 parts as shown in FIG.
It has a rectangular parallelepiped shape with stacked layers, and is made of dielectric or insulator in order from the bottom layer, and has a thickness of 20 to 50 μm.
A sheet-like holding IJm1. Shield electrode layer 2. Sheet layer 3 made of dielectric or insulator and having a thickness of 1 to 1.5+n
．． Back electrode layer made of a conductive material such as copper 4. A sheet-shaped dielectric layer 5 made of a dielectric material, for example a BaO-3iBaO-3in dielectric material and having a thickness of 20 to 50 μm; and a surface electrode layer 6 made of a conductive material such as copper. A sheet layer 7 with a thickness of 20 to 50 μm made of a dielectric or an insulator, an adhesive layer 30, a sheet J with a thickness of 1 to 1.5 mm made of a dielectric or an insulator.
i21, a shield electrode layer 22, and a sheet-like protective layer 23 made of a dielectric or an insulator and having a thickness of 20 to 50 μm.

The above protective layer 1. Shield electrode layer 2. Sheet layer 3° back electrode FJ4. The dielectric layer 52, the front electrode layer 6, and the sheet layer 7 are formed as an integral part, and constitute a first divided block 10 consisting of seven layers for constructing a resonator, among which the back electrode layer 4. The dielectric layer 5 and the front electrode layer 6 constitute a resonator body. Further, the sheet layer 21. The shield electrode layer 22 and the protective layer 23 are integrally formed as before, and the first
3 for constructing a resonator together with the divided block 20 of
This is a second divided block 20 consisting of N blocks. Such first
．． The adhesive J'i 30 interposed between the second divided blocks 10 and 20 is for integrating the two side blocks 10 and 20, and is made of synthetic resin such as thermoplastic or thermosetting resin. adhesives such as synthetic rubber adhesives and synthetic rubber adhesives. Note that the protective layer 1.23 is for electrically insulating the resonator and protecting it from scratches, and is not an essential requirement of the present invention.

Both the back electrode layer 4 and the front electrode layer 6 have tongues 4a and 5a that reach one side of the resonator, and the exposed portions of the tongues 4a and 6a are connected to the side surface below. They are electrically connected to terminal electrode films 31 and 32 made of a conductive material such as silver, which are formed in an oversized shape on the bottom surface, respectively. The terminal electrode films 31 and 32 are formed so as to be electrically insulated from each other and from other layers.

The back electrode layer 4 and the front electrode layer 6 are composed of two capacitor electrode patterns 61, 62, 41, 42 as shown in FIG.
It is connected by two coil patterns 63 and 43, and has a U-shaped pattern shape in plan view. The capacitor electrode patterns 61 and 41 and 62 and 42 are formed on the dielectric layer 5, respectively.
, and form capacitors C1 and C2 having capacities determined by the dielectric constant and thickness of the dielectric layer 5, and the facing area of the capacitor electrodes. On the other hand, the coil patterns 63 and 43 are formed to connect the two capacitor electrode patterns 61 and 62, and 41 and 42 on the front and back surfaces of the dielectric layer 50, respectively. Each coil pattern 63, 43 forms a coil in terms of high frequency, so if their inductances are Ll and L2, the resonator body has coils Ll on both sides of the first capacitor C1, as shown in FIG.

This is an equivalent circuit in which a second capacitor C2 is connected in parallel to an LC circuit in which L2 is connected in series. Note that this equivalent circuit is the same for the conventional product shown in FIG.

A method of manufacturing a resonator having such a structure will be described next. First, a protective layer 1, a sheet layer 3, and a dielectric layer 5 are prepared, and a paste made of a conductive material such as copper is screen printed or coated on the surface of the protective layer 1 to form a shield electrode 2.
A U-shaped back electrode 4 having the tongue piece 4a is formed on the surface of the sheet layer 3 in the same manner,
Further, a U-shaped surface electrode 6 having the above-mentioned tongue pieces 6a is formed on the surface of the dielectric layer 5 in the same manner, and these are overlapped with the sheet layer 7 and then pressed together to form the first division into seven layers. A block 10 is formed, and a paste made of a conductive material such as copper or silver is printed on the exposed portion of the tongue piece 4a r6a, the side surface below this, and the bottom surface following this in the first divided block 10. After forming the terminal electrode films 31 and 32, the first divided block 1
0 is fired at, for example, 1000° C. for 2 hours.

Further, the shield electrode layer 22 is formed by screen printing or applying a paste made of a conductive material such as copper on the surface of the prepared sheet layer 21, and after stacking these together with the protective layer 23, they are pressed and baked. , 3N is obtained.

Note that the protective layers 1 and 23, the sheet layers 3, 7, and 21, and the dielectric layer 5 are each made of one sheet material, or
Alternatively, it is arbitrary whether the structure is constructed by laminating a plurality of sheet materials, and can be selected as appropriate. Also number 1. The second divided blocks 10.20 may be fired in advance.

In this example, the sheet layer 7 of the first divided block 10 obtained as described above and the sheet layer 21 of the second divided block 20 are made to face each other, and an adhesive layer 30 is interposed therebetween. The redivided blocks 10 and 20 are bonded together by applying an adhesive.

Although adhesive is used for the adhesive layer 30 in this embodiment, a sheet-like material such as double-sided tape may also be used.

Further, a front electrode layer 6, a back electrode layer 4, and a shield electrode layer 2.
Each of the seven layers (including the adhesive layer 30) except for 22 may be constructed from a single sheet material, or may be constructed by stacking two or more sheet materials made of the same material.

In the resonator manufactured in this manner, shield electrode layers 22.2 are disposed above and below the resonator body. Therefore, the resonator body is shielded by the shield electrode layers 22, 2, and the shield electrode 1'! 2
Specifically, by changing the separation distance between both or one of 2.2 and the resonator body, the sheet 7!3, 7.
It is possible to adjust the frequency characteristics of the resonator by changing the thickness of one sheet material for the four layers 21 and adhesive layer 30, or by increasing or decreasing the number of multiple sheet materials constituting each of the above layers. Become.

Next, a method for adjusting the frequency characteristics in a resonator according to the present invention will be described, for example, in a case where the thickness of the adhesive layer 30 is changed.

First, if the resonant frequency is higher than a desired value, the adhesive layer 30 is made thicker. As a result, the resonator main body is separated from the shield electrode layer 22, so that the resonant frequency is lowered. As a result, the resonance frequency can be adjusted from curve 1 to curve 2 as shown in FIG. 5 (frequency characteristic curve).

Conversely, if the resonant frequency is lower than the desired value, the adhesive layer 30 is made thinner. As a result, contrary to the above case, the shield electrode layer approaches the resonator body, so curve 1 changes to curve 3, and the resonant frequency increases.

Adjustment of the resonant frequency in this way requires not only the adhesive layer 30 but also one of the sheet layers 3 and 7° 21.
By changing the thickness along with the above (or adhesive layer 3
It can also be carried out (by changing the thickness of one or more of the sheet layers 3, 7, 21 without changing the thickness of the sheet layer 3, 7, 21).

In this embodiment, the adhesive layer 30 is provided between the sheet layer 7 and the sheet N21, but the present invention is not limited to this, and the adhesive layer 30 may be provided between the resonator body and the upper shield electrode layer 22. The adhesive layer may be provided at any height position. Further, it may be provided between the resonator main body and the lower shield electrode layer 2, and furthermore, it may be provided between the resonator main body and the upper and lower shield electrode layers 22.2.
It may be provided between.

This may occur between one of the pair of shield electrode layers 2, 22 and the resonator body and/or between the pair of shield electrode layers 2, 22.
It is also agreed that an adhesive layer may be interposed between a plurality of divided blocks formed by dividing the other block of 2 and the resonator body.

Further, in the above embodiment, the front electrode layer 6, the back electrode layer 4, and the shield electrode layers 2, 22 are formed by printing or coating, but the present invention is not limited to this. It is also possible to prepare sheet materials made of conductive material for the shield electrode layer 2 and shield electrode layer 2 and 22, and to overlap these sheet materials with other sheet materials to create a plurality of divided blocks. A sheet material made of a conductive material is prepared for one or more of the layer 4 and the shield electrode layers 2 and 22, and a plurality of divided blocks are created by overlapping each sheet material in combination with printing or coating. You can. Furthermore, the sheet layers 3, 7.21 and the dielectric layer 5 are each
It is arbitrary whether it is constructed by one sheet material or by laminating a plurality of sheet materials, and can be selected as appropriate.

As detailed above, according to the present invention, the resonator body,
Since the structure includes a pair of sheet layers and a pair of shield electrode layers in a laminated state, and is divided between the resonator body and the shield electrode layer, and an adhesive layer is interposed between them, the thickness of the adhesive layer and the sheet layer is By changing the height, it is possible to adjust the separation distance between the resonator body and the shield electrode layer, which provides an excellent effect of making it possible to adjust the resonant frequency.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing an embodiment of the product of the present invention, the second is a sectional view (front view) taken along the line nn in Fig. 1, and Fig. 3 is the II[-11I line in Fig. 2]. FIG. 4 is an equivalent circuit diagram of the resonator body of the product of the present invention, and FIG.
The figure shows the before and after adjustment when the frequency characteristics are adjusted according to the present invention.
A graph showing the later frequency characteristic curve, Fig. 6 is a partially cutaway front view of the conventional product, and Fig. 7 is the graph shown in Fig. 6.
FIG. 2.22... Shield electrode layer, 3.21... Sheet layer, 4... Back electrode layer, 5... Dielectric layer, 6... Front electrode layer, 10... First Divided block, 20... Second divided block, 30... Adhesive layer. Patent applicant: Murata Manufacturing Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 7 Procedural amendment old (voluntary) January 10, 1999

Claims (3)

[Claims] (1) A resonator body with a predetermined conductive pattern formed on both sides of a dielectric layer, a pair of sheet layers made of dielectric or insulator provided on both sides of the resonator body, and the resonator body and A pair of shield electrode layers provided on both sides of the pair of sheet layers are provided in a laminated state, and a space between one or both of the pair of shield electrode layers and the resonator body is divided, and a plurality of divided A resonator characterized in that each divided block is integrated with an adhesive layer interposed between the divided blocks. (2) A resonator body with a predetermined conductive pattern formed on both sides of a dielectric layer, a pair of sheet layers made of dielectric or insulator provided on both sides of the resonator body, and a resonator body and A method for manufacturing a resonator comprising a pair of shield electrode layers provided on both sides of the pair of sheet layers in a laminated state, the method comprising: one or both of the pair of shield electrode layers and a resonator body; Manufacture of a resonator characterized in that a plurality of fired divided blocks are prepared or manufactured in advance, and an adhesive layer is interposed between each divided block to integrate each divided block. Method. (3) A resonator body with a predetermined conductive pattern formed on both sides of a dielectric layer, a pair of sheet layers made of dielectric or insulator provided on both sides of the resonator body, and a resonator body and A pair of shield electrode layers provided on both sides with the pair of sheet layers sandwiched therebetween in a laminated state, and a space between one or both of the pair of shield electrode layers and the resonator body is divided, and a plurality of divided plurality A method for adjusting frequency characteristics in a resonator in which an adhesive layer is interposed between the divided blocks to integrate each divided block, the method comprising: at least one of the pair of sheet layers and/or the adhesive layer. A method for adjusting frequency characteristics in a resonator, the method comprising adjusting the separation distance between the shield electrode layer and the resonator main body by changing the thickness of the layer, thereby adjusting the frequency characteristics of the resonator main body.