JPH0653709A - Dielectric resonance component and its manufacture - Google Patents

Abstract

PURPOSE:To obtain an inexpensive dielectric resonator component with less number of process at the manufacture and its manufacture method. CONSTITUTION:Projections 241a, 242a are provided in advance for a side face of a dielectric board 2 on which a resonator block having plural stages of dielectric resonators is mounted. After input/output electrodes 21, 22 and a ground electrode 23 are formed on the dielectric board 2, the projections 241a, 242a are cut off from the dielectric board 2. Thus, insulation spaces 241, 242 are formed on a side of the dielectric board 2. The insulation spaces 241, 242 insulate electrically between the input output electrodes 21, 22 and the ground electrode 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric resonance component and a method for manufacturing the same, and more particularly to a dielectric resonance component formed by coupling a plurality of stages of dielectric resonators and a method for manufacturing the same. .

[0002]

2. Description of the Related Art FIG. 7 is an exploded perspective view showing an example of the structure of a conventional dielectric filter used in a mobile communication device such as a car phone or a mobile phone. In FIG. 7, the resonator block 1 includes a dielectric block 10 in which resonator holes H1 to H3 are formed. An inner conductor as a resonance electrode is formed on the inner wall of each resonator hole H1 to H3. Also,
An outer conductor 11 as a ground electrode is formed on the outer peripheral surface of the dielectric block 10. The inner conductors formed on the inner walls of the resonator holes H1 to H3 cooperate with the outer conductor 11 to form a three-stage dielectric resonator.

The resonator block 1 is mounted on the dielectric substrate 2 and fixed by solder, conductive paste or the like.
Input / output electrodes 21 are formed on the upper surface, side surfaces, and lower surface of the dielectric substrate 2 in the vicinity of the left end thereof. Input / output electrodes 22 are formed on the upper surface, side surfaces, and lower surface of the dielectric substrate 2 in the vicinity of the right end thereof.
These input / output electrodes 21 and 22 are capacitively coupled to the adjacent dielectric resonators in the resonator block 1, and input / output signals between the dielectric resonators and an external circuit (not shown). A ground electrode 23 is formed on the upper surface edge, side surface and lower surface of the dielectric substrate 2. The ground electrode 23 is connected to the outer conductor 11 of the resonator block 1. The input / output electrodes 21 and 22 are electrically insulated from the ground electrode 23 via the insulating space 24. Further, the outer conductor 11 of the resonator block 1 and the input / output electrodes 21, 22 of the dielectric substrate 2 are also electrically insulated via the insulating space 12.

[0004]

As described above, in the conventional dielectric filter, the electrical connection is provided between the outer conductor 11 and the input / output electrodes 21, 22 and between the input / output electrodes 21, 22 and the ground electrode 23. Insulation spaces 12 and 24 must be provided on each side of the resonator block 1 and the dielectric substrate 2 for effective insulation. Conventionally, as a method for providing such insulating spaces 12 and 24, (1) after forming each electrode on the dielectric block 10 and the dielectric substrate 2, the electrode corresponding to the insulating space is removed by a luter or the like. Or (2) on each side surface of the dielectric block 10 and the dielectric substrate 2, a resist is applied to a portion corresponding to an insulating space, plating is performed, and then plating on the resist portion is peeled off. It was

However, in any of the above methods (1) and (2), there is a problem that the work takes time and the cost of the product increases.

[0006] Therefore, an object of the present invention is to provide an inexpensive dielectric resonance component which requires a small number of working steps during manufacturing.

[0007]

The invention according to claim 1 is
A dielectric resonator component in which a plurality of stages of dielectric resonators are coupled, the resonator block having a plurality of stages of dielectric resonators,
And a dielectric substrate on which the input / output electrode and the ground electrode are formed and on which the resonator block is mounted. The dielectric substrate has an insulating space formed by cutting off the convex portion provided on the side portion. It is characterized in that the input / output electrode and the ground electrode are electrically insulated by this insulating space.

According to a second aspect of the present invention, there is provided a method of manufacturing a dielectric resonance component in which a plurality of stages of dielectric resonators are coupled to each other, and a step of preparing a resonator block having a plurality of stages of dielectric resonators. And a step of preparing a dielectric substrate having a convex portion formed on the side, a step of forming an input / output electrode and a ground electrode on the dielectric substrate, and cutting the convex portion from the dielectric substrate to form an input / output electrode. And a step of securing an insulating space between the ground electrode and the ground electrode, and a step of mounting the resonator block on the dielectric substrate in which the insulating space is secured.

[0009]

In the invention according to claim 1, the dielectric substrate has an insulating space for insulating between the input / output electrode and the ground electrode. This insulating space is provided on a side portion of the dielectric substrate. It is formed by cutting off the provided convex portion.

According to the second aspect of the present invention, the convex portion formed on the side portion of the dielectric substrate is cut off to secure an insulating space between the input / output electrode and the ground electrode on the dielectric substrate. I have to.

As described above, in any of the first and second aspects of the present invention, it is not necessary to grind the side surface of the dielectric substrate with a router as in the conventional dielectric filter, and a resist is applied to the side surface. Since it is not necessary, the number of manufacturing steps is small. Therefore, the cost of the product can be reduced.

[0012]

1 is an exploded perspective view showing the structure of a dielectric filter according to an embodiment of the present invention. In FIG. 1, semicircular recesses 25 and 26 are provided on the left and right side surfaces of the dielectric substrate 2. The input / output electrode 2 is formed on the inner peripheral surface of the recess 25.
1 is formed. The input / output electrode 21 is the dielectric substrate 2
Is also formed so as to extend to the upper surface and the lower surface. Similarly,
The input / output electrode 22 is also formed on the inner peripheral surface of the recess 26, and the input / output electrode 22 is also formed to extend to the upper surface and the lower surface of the dielectric substrate 2. An insulating space 241 is provided on the left side surface of the dielectric substrate 2 and between the recess 25 and the ground electrode 23. An insulating space 242 is provided on the right side surface of the dielectric substrate 2 and between the recess 26 and the ground electrode 23. These insulating spaces 241 and 242 are formed by a method completely different from that of the insulating space 24 shown in FIG. 7, as described later.

The resonator block 1 shown in FIG. 1 is mounted on the dielectric substrate 2 also shown in FIG. 1 and fixed by solder or conductive paste. Although the insulating space 12 as shown in FIG. 7 is not provided on the left and right side surfaces of the resonator block 1 shown in FIG. 1, the recesses 25 and 26 are provided on the side surface of the dielectric substrate 1. The non-contact is maintained between the outer conductor 11 and the input / output electrodes 21 and 22. The other structure of the dielectric filter shown in FIG. 1 is the same as that of the conventional dielectric filter shown in FIG. 7, and the corresponding parts are designated by the same reference numerals and the description thereof will be omitted.

Next, a method of manufacturing the dielectric substrate 2 shown in FIG. 1 will be described with reference to FIG. First, as shown in FIG. 2A, a dielectric substrate 2 without electrodes is prepared. A concave portion 25 is formed on the left side surface of the dielectric substrate 2, and a convex portion 241a is formed so as to surround the concave portion 25. In addition, a concave portion 26 is formed on the right side surface of the dielectric substrate 2.
Is formed, and the convex portion 242 surrounds the concave portion 26.
a is formed.

Next, the upper surface of dielectric substrate 2 (the surface on which resonator block 1 is mounted) is polished, and then resist is applied to predetermined regions on the upper and lower surfaces of dielectric substrate 2. Then, electrodes such as copper are formed by plating or the like on the entire six faces (top face, bottom face, front face, back face, right side face, left side face) of the dielectric substrate 2 coated with the resist. Next, the resist is removed, and as a result, the electrode in the portion where the resist is formed is removed. Thereby, the upper surface, the left side surface (or the right side surface) and the lower surface of the dielectric substrate 2 are respectively
The electrode patterns as shown in FIGS. 2B, 2C and 2D are left.

Next, the convex portions 241a and 242a are cut off from the dielectric substrate 2 (see FIG. 3). As a result, the top surface, the left side surface (or the right side surface) of the dielectric substrate 2,
The shape of the lower surface and the electrode pattern formed on them are
2 (e), (f), and (g), respectively. 2 (e), (f), (g), and FIG. 3, when the protrusions 241a and 242a are cut off from the dielectric substrate 2, the left side surface and the right side surface of the dielectric substrate 2 are Insulation spaces 241 and 24 respectively
2. As described above, the insulating space 241 electrically insulates between the ground electrode 23 and the input / output electrode 21,
The insulating space 242 electrically insulates the ground electrode 23 from the input / output electrode 22.

In order to avoid contact between the input / output electrodes 21 and 22 and the outer conductor 11 of the resonator block 1, the insulating spaces 241 and 242 are formed on the dielectric substrate 1 as shown in FIG.
It is preferable to deeply scrape inside.

Next, a method of manufacturing the resonator block 1 shown in FIG. 1 will be described with reference to FIG. First, as shown in FIG. 5A, the dielectric block 10 without electrodes is formed.
Is prepared. Resonator holes H1 to H3 are formed in the dielectric block 10. Next, the dielectric block 1
A resist is applied to a predetermined area on the lower surface of 0. In addition,
5A and 5B, since the dielectric block 10 is shown upside down, the lower surface appears on the upper side. Then, electrodes such as copper are formed by plating or the like on the entire six faces (top face, bottom face, front face, back face, right side face, left side face) of the dielectric block 10 coated with the resist. Next, the resist is removed, and as a result, the electrode in the portion where the resist is formed is removed. As a result, the resonator block 1 as shown in FIG. 5B is obtained.

As described above, in the embodiment shown in FIGS. 1 to 5, the dielectric block 1 is used to form the insulating space.
0, since it is not necessary to grind each side surface of the dielectric substrate 2 with a lute, and it is not necessary to apply a resist to each side surface,
The number of manufacturing steps is smaller than that of the conventional dielectric filter shown in FIG. As a result, the cost of the product can be reduced.

FIG. 6 is an exploded perspective view showing the structure of a dielectric filter according to another embodiment of the present invention. In FIG. 6, the dielectric substrate 2 has recesses 25, 2 as shown in FIG.
6 is not provided. Therefore, when the resonator block 1 is mounted on the dielectric substrate 2, the input / output electrodes 21, 2 are
2 is located on the same plane as the left and right side surfaces of the resonator block 1. Therefore, if it is left as it is, the outer conductor 11 of the resonator block 1 and the input / output electrodes 21 and 22 come into contact with each other. Therefore, insulating spaces 12 are provided on the left and right side surfaces of the resonator block 1 as in the conventional dielectric filter shown in FIG. In the embodiment of FIG. 6 having the above-described structure, the resist has to be applied to the side surface of the dielectric block 10, so that the number of manufacturing steps is increased as compared with the embodiment shown in FIG. Since it is not necessary to apply a resist to the side surface of the body substrate 1, the number of steps in manufacturing can be reduced as compared with the conventional dielectric filter shown in FIG.

Although each of the embodiments described above is provided with a three-stage dielectric resonator, the present invention is not limited to such a configuration, and dielectrics having other stages are provided. It may be configured as a filter. Further, the present invention is applicable not only to the dielectric filter but also to other dielectric resonance components (a part of the oscillator, etc.).

[0022]

As described above, according to the present invention, by cutting off the convex portion formed on the side portion of the dielectric substrate, an insulating space is provided between the input / output electrode and the ground electrode on the dielectric substrate. Therefore, it is not necessary to grind the side surface of the dielectric substrate with a lute like a conventional dielectric filter, and it is not necessary to apply a resist to the side surface. Therefore, the number of manufacturing steps is reduced, and an inexpensive dielectric resonance component can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the structure of a dielectric filter according to an embodiment of the present invention.

FIG. 2 is a manufacturing process diagram for explaining the manufacturing method of the dielectric substrate shown in FIG.

3 is a partial perspective view showing in more detail a state before and after cutting off a convex portion from the dielectric substrate shown in FIG.

FIG. 4 is a partial plan view showing a preferable cutting line when a convex portion is cut off from the dielectric substrate shown in FIG.

5A to 5D are manufacturing process diagrams for explaining the manufacturing method of the resonator block shown in FIG.

FIG. 6 is an exploded perspective view showing the structure of a dielectric filter according to another embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a configuration of a conventional dielectric filter.

[Explanation of symbols]

 1: Resonator block 10: Dielectric block H1 to H3: Resonator hole 11: Outer conductor 12: Insulation space 2: Dielectric substrate 21,22: Input / output electrode 23: Ground electrode 241,242: Insulation space 241a, 242a : Convex portion 25, 26: Recessed portion

Front Page Continuation (72) Inventor Hisashi Mohri 2-10-10 Tenjin, Nagaokakyo, Kyoto Prefecture Murata Manufacturing Co., Ltd.

Claims (2)

[Claims] 1. A dielectric resonance component in which a plurality of stages of dielectric resonators are coupled to each other, wherein a resonator block having a plurality of stages of dielectric resonators, an input / output electrode and a ground electrode are formed on the resonator block. A dielectric substrate on which the resonator block is mounted, and the dielectric substrate has an insulating space formed by cutting off a convex portion provided on a side portion, and the insulating space allows the input / output electrode to be formed. A dielectric resonance component, characterized in that it is electrically insulated from the ground electrode. 2. A method of manufacturing a dielectric resonance component in which a plurality of stages of dielectric resonators are coupled, comprising: preparing a resonator block having a plurality of stages of dielectric resonators; A step of preparing a dielectric substrate having a portion formed thereon, a step of forming an input / output electrode and a ground electrode on the dielectric substrate, and by cutting off the convex portion from the dielectric substrate,
A dielectric resonance component comprising: a step of securing an insulating space between the input / output electrode and the ground electrode; and a step of mounting the resonator block on the dielectric substrate having the insulating space secured. Manufacturing method.