JPH0127564B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a magnetic capacitor series having a magnetic capacitor having an internal electrode structure.

<Prior art> The most well-known ceramic capacitor with an internal electrode structure is a multilayer ceramic capacitor in which a large number of internal electrodes are buried in layers in the thickness direction of a ceramic substrate. Other types of capacitors have recently been proposed, such as single-layer capacitive ceramic capacitors embedded in layers inside a ceramic substrate.
These ceramic capacitors with an internal electrode structure are small, large-capacitance, highly insulating, exhibit excellent frequency characteristics up to a high frequency range, and generally have a monolithic moisture-proof structure, so they can be used without an exterior cover.
It has features such as high reliability, and is an important component for thick film IC and modularization of circuits.
It is becoming widely used in various electronic devices such as electronic computers, communication devices, television receivers, radio receivers, electronic clocks, and calculators.

As illustrated in FIGS. 1A and 1B, these ceramic capacitors with an internal electrode structure include, in the thickness direction, a ceramic substrate 1 made of a suitable high permittivity dielectric ceramic material such as barium titanate or titanium oxide. The internal electrodes 2 and 3 are embedded in a layered manner, and these electrodes 2 and 3 are led out to opposite ends of the substrate 1, and these are separately applied to the end electrodes 4 and 5, which are coated and baked on both ends. It had a structure with lead-out connections.

<Problems to be Solved by the Invention> However, the structure in which the end electrodes 4 and 5 are formed separately at opposite ends makes it difficult to use the chip components for thick film ICs or circuit modules. Although there are advantages such as the ability to directly bond the end electrodes 4 and 5 to a conductor pattern, it is also possible to connect lead wires to the end electrodes 4 and 5 and use them as discrete components, or to bond them onto a taping member. When connecting magnetic capacitors by taping them, for example, as shown in FIG. Because it must be fixed, the support stability of the magnetic capacitor on the lead wires 6 and 7 is poor, and some of the capacitors often fall off the lead wires 6 and 7, making it necessary to use a special fixing jig. It was hot.

In addition, in order to eliminate the above-mentioned drawbacks, it is necessary to extend the end electrodes 4 and 5 more than necessary on the surface of the ceramic substrate 1, or to make the shape of the lead wire clip a special shape other than a general-purpose type. There were also problems such as not being able to do so.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a series of ceramic capacitors that is very easy to insert into lead wire clips, has high support stability, and can be automatically lined by taping. There is a particular thing.

<Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention includes a magnetic capacitor, a lead wire clip that sandwiches the magnetic capacitor, and a band-shaped taping member that holds the lead wire clip. A series of ceramic capacitors, wherein the ceramic capacitor has a recessed portion due to a missing portion approximately in the middle of one end of a flat substrate in which internal electrodes are embedded, and the internal electrodes are disposed on both sides of the recessed portion. A pair of end electrodes that are electrically connected to the capacitor are separated and formed by the recess, and the lead wire clip is electrically connected to each of the pair of end electrodes to connect the ceramic capacitor. It is characterized by being inserted from both sides in the thickness direction.

<Function> A ceramic capacitor has a recessed portion approximately in the middle of one side end of a flat substrate in which internal electrodes are embedded, and a pair of end portions that are electrically connected to the internal electrodes on both sides of the recessed portion. Since the electrodes are divided by recesses and deposited, when connecting a ceramic capacitor,
Using a lead wire clip of a very general shape, insert the ceramic capacitor into the tip of the lead wire clip from the end electrode side, and solder the lead wire. The end electrode can be easily and securely inserted into the wire clip. This streamlines the manufacturing process for ceramic capacitors and improves mass productivity.

Moreover, the lead wire clips are inserted into the ceramic capacitor from both sides in the thickness direction so as to be electrically conductive to each of the pair of end electrodes.
The lead wire clip increases the support stability of the ceramic capacitor.

Furthermore, the ceramic capacitor has a recessed portion in the middle of one end of the substrate, and a pair of end electrodes are formed on both sides of the recessed portion, separated by the recessed portion. Because of this, the recess ensures electrical insulation between the end electrodes and makes it possible to detect the directionality of the ceramic capacitor.

<Example> FIG. 3A is a partially cutaway front view of a ceramic capacitor used in a ceramic capacitor series according to the present invention.
Figure B is a sectional view taken along line B ₁ - B ₁ of Figure 3 A,
FIG. 3C is a sectional view taken along line B ₂ -B ₂ of FIG. 3A. In the figures, the same reference numerals as in FIGS. 1A and 1B indicate functionally identical components. In this embodiment, a dielectric ceramic layer 1 having a multilayer thickness of, for example, several micrometers to several tens of micrometers in the thickness direction inside a dielectric ceramic substrate 1 formed into a substantially rectangular flat plate shape.
Internal electrodes 2 and 3 are embedded in layers facing each other with A in between, and one end of the internal electrodes 2 and 3 in the same direction is led out to an end A in the same direction of the ceramic substrate 1. . In this case, the internal electrodes 2 and 3 are led out to the end surface A of the ceramic substrate 1 such that the leading edges do not overlap in the thickness direction of the ceramic substrate 1. That is, as shown exploded in FIG. 4, the left half (in the figure) of the internal electrode 2 is set back inward by a gap G ₁ from the end surface A of the ceramic substrate 1, and only the right half is led out to the end surface A. However, the internal electrode 3 has a pattern opposite to that of the internal electrode 2,
That is, the right half is set back inward by a gap _G2 from the end face A of the ceramic substrate 1, and only the left half is led out to the end face A. Then, an end electrode 4 electrically connected to the internal electrode 2 and an end electrode 5 electrically connected to the internal electrode 3 are coated and baked on the end surface A, respectively. The end electrodes 4 and 5 are separated from each other by a recess 8 which is formed by cutting out approximately the center of the ceramic substrate 1 in the width direction.

As mentioned above, in the ceramic capacitor according to the present invention, the end electrodes 4 and 5 are formed on the end surface A of the ceramic substrate 1 in the same direction, so that the lead wire clip is connected and fixed to the ceramic capacitor. When connecting, as shown in FIG. 5, a lead wire clip 9 of a very general shape is used, and the magnetic capacitor is attached to the tip of the lead wire clip 9 on the side where the end electrodes 4 and 5 are located. The end electrodes 4 and 5 can be easily and reliably inserted into the lead wire clip 9 by inserting them into the lead wire clip 9 and then soldering them.

Furthermore, since the structure is such that the lead wire clips 9 clamp the ceramic substrate 1 from both sides in the thickness direction, the support stability is very good.

Further, as shown in FIG. 6, the taping member 1
Lead wire clip 9 taped on 0 in advance
In addition, when the magnetic capacitor is inserted to obtain a magnetic capacitor chain, the magnetic capacitor can be easily and securely inserted into the lead wire clip 9, and the support stability can be improved. Processes are streamlined and mass productivity is improved. In addition, the recess 8 provided between the end electrodes 4 and 5 is
Of course, it serves as a part to ensure electrical insulation between the end electrodes 4 and 5, but it also serves as a part to detect the directionality of the ceramic capacitor, so in addition to the above-mentioned effect, taping It becomes possible to automate the process.

In other words, the ceramic capacitors generally do not have a front or back direction, but they do have an upward or downward direction. In order to automate the sandwiching process, it is necessary to detect the top and bottom directions of the magnetic capacitor.
In this case, the recess 8 is used as a directionality detection part, and the direction in which the recess 8 is located can be detected by means such as optical detection, thereby automatically detecting the directionality of the ceramic capacitor. , automatic insertion of the magnetic capacitor into the lead wire clip 9 becomes possible.

In the above-described embodiments, a single-layer capacitive ceramic capacitor was explained as an example, but the present invention can be similarly applied to a multi-layer laminated ceramic capacitor. It goes without saying that the shapes of the ceramic substrate 1 and the recesses 8, the patterns of the internal electrodes 2 and 3, etc. can be changed in various ways.

<Effects of the Invention> As described above, according to the present invention, the following effects can be obtained.

(a) A ceramic capacitor has a recessed portion approximately in the middle of one side end of a flat substrate in which internal electrodes are embedded, and a pair of conductive electrodes are provided on both sides of the recessed portion. Since the end electrodes are adhered, the work of inserting the lead wire into the lead wire clip is very easy, and the automatic taping process can be streamlined to provide a series of ceramic capacitors that can significantly improve mass production.

(b) The lead wire clip is connected to each of the pair of end electrodes, and the ceramic capacitor is sandwiched from both sides in the thickness direction, so the ceramic capacitor chain can support the ceramic capacitor with high stability. Can be provided.

(c) A porcelain capacitor has a recessed portion approximately in the middle of one end of a flat substrate, and a pair of end electrodes are divided by the recessed portion on both sides of the recessed portion. Since the electrodes are formed by adhesion, the recesses ensure electrical insulation between the end electrodes, and
It is possible to provide a series of magnetic capacitors which has a part for detecting the directionality of the magnetic capacitors and which enables automatic taping process.

[Brief explanation of drawings]

Fig. 1A is a plan view of a conventional ceramic capacitor, Fig. 1B is a front sectional view thereof, Fig. 2 is a diagram explaining the drawbacks when connecting lead wires, Fig. 3A
3B is a partially cutaway front view of a ceramic capacitor used in a ceramic capacitor series according to the present invention, and FIG.
FIG. _3C is a sectional view taken along line B ₁ - B ₁ of FIG. _3A , FIG. 4 is an exploded perspective view thereof, and FIG. FIG. 6 is a front view of a part of the ceramic capacitor series according to the present invention, showing the relationship between the ceramic capacitor and the lead wire clip in the series. 1...Porcelain substrate, 2, 3...Internal electrode, 4,5
... end electrode, 8 ... recess, 9 ... lead wire clip, 10 ... taping member.

Claims (1)

[Scope of Claims] 1. A series of magnetic capacitors comprising a magnetic capacitor, a lead wire clip for sandwiching the magnetic capacitor, and a band-shaped taping member for holding the lead wire clip, wherein the magnetic capacitor has an internal A flat substrate in which electrodes are embedded has a recessed portion approximately in the middle of one side end thereof, and a pair of end electrodes that are electrically connected to the internal electrodes are placed in the recessed portions on both sides of the recessed portion. Accordingly, the lead wire clips are formed separately and adhered to each other, and the lead wire clips are inserted into the ceramic capacitor from both sides in the thickness direction so as to be electrically connected to each of the pair of end electrodes. Features a series of porcelain capacitors.