JPH02305425A - Cr compound part - Google Patents

Abstract

PURPOSE:To manufacture the title CR compound part containing a resistor inside a condenser element by a method wherein a dielectric sheet whereon an earth electrode is formed is laminated on another dielectric sheet whereon another electrode and a resistor continuous to this electrode to be formed into one body. CONSTITUTION:A dielectic sheet 3 comprising ceramics etc., whereon an earth electrode 2 is formed is laminated on another dielectric sheet 6 whereon another electrode 4 and a resistor 5 continuous to this electrode 4 are formed. Then, ceramic dummy sheets 7, 8 whereon nothing is printed are laminated on upper and lower surfaces to be formed into one body while outer electrodes 9, 10 are provided on both ends of this laminated body as well as earth outer electrodes 11 are provided on the sides to complete the constitution. In such a constitution, a condenser element is formed of the electrode 4 and the earth electrode 2 opposing to each other holding the dielectric substrate 3 so as to form a CR compound part containing the resistor 5 continuous to the electrode 4 inside the condenser element. Through these procedures, a CR compound element in high reliability and fit for mass-production can be manufactured.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a CR
This relates to 11 parts.

<Conventional technology> CR circuits, which are often used in general-purpose circuits, usually combine independent components such as a capacitor element and a resistor element, but with the miniaturization of electrical equipment, CR circuits have become Demand has increased, and for this reason, CR composite components in which a resistance is formed on the surface of a ceramic capacitor element have been proposed.

As shown in FIG. 12, a conventional CR composite component has a capacitor element 24 formed by providing electrodes 22 and 23 on both sides of a ceramic dielectric substrate 21, and a resistor 25 that is electrically connected to the electrodes 22 on the surface of the capacitor element 24. Also, as shown in FIG. 13, a resistor 29 is provided on the surface of the multilayer capacitor element 26 so as to be electrically connected to the external electrode 27 and the lead electrode 28.

<Problems to be Solved by the Invention> By the way, in the conventional CR composite parts described above, since the resistor is located on the outer surface of the capacitor element, the resistor tends to change over time, and its environmental resistance deteriorates. There is a problem that the reliability of composite parts is inferior.

Furthermore, since the resistor is external, it is easily damaged during mounting (and it is difficult to mount it on a circuit board using a conventional mounting machine).

Furthermore, since the formation of the resistor is a separate process, the process becomes complicated, making mass production difficult and increasing manufacturing costs.

The purpose of this invention is to solve the above-mentioned problems by making it possible to form a resistor during the manufacturing process of a capacitor element, and storing the resistor inside the capacitor element, thereby achieving high reliability and suitability for mass production. It is an object of the present invention to provide a CR composite element.

Means for Solving the Problems> In order to solve the above problems, the present invention provides a dielectric sheet formed to reach the side edge with a ground electrode on the surface, an electrode on the surface and a dielectric sheet that is electrically conductive with the electrode. Dielectric sheets with resistors formed to reach both edges are stacked, and dummy sheets are stacked on both the top and bottom ends of the dielectric sheets, which are then laminated and integrated.
This laminate has an external electrode connected to the electrode at one end, an external electrode connected to the resistor at the other end, and an earth external electrode connected to the ground electrode on the side of the laminate. It is.

<For use> A capacitor element is formed by electrodes and a ground electrode that face each other with a dielectric substrate in between, and a resistor that is electrically connected to the electrode is housed inside the capacitor element, forming a CR composite component.

<Examples> Examples of the present invention will be described below with reference to FIGS. 1 to 11 of the accompanying drawings.
This will be explained based on the diagram.

As shown in FIGS. 1 to 4, the CR composite component 1 includes a dielectric sheet 3 made of ceramic or the like with a ground electrode 2 formed on its surface, and a dielectric sheet 6 with an electrode 4 and a resistor 5 formed on its surface.
are stacked, and ceramic dummy sheets 7 and 8 with nothing printed on the top and bottom surfaces are stacked and integrated, and external electrodes 9 and 1O are placed on both ends of this laminate, and a ground external electrode 1 is placed on the side.
1.

The dielectric sheet 3.6 is formed by forming a dielectric material and a binder plasticizer into a sheet by a drawing method, etc., and the ground electrode 2 is formed on the dielectric sheet 3 using Pd ink or the like as shown in FIG. It is formed by applying a small amount on both side edges (both sides reach one side edge).

6 to 8 show different examples of means for forming the resistor 5. In FIG. 6, a narrow portion is provided in the middle of the electrode 4 coated so as to reach both edges of the dielectric sheet 6, This narrow portion forms the resistor 5.

In the example shown in FIG. 7, the electrode 4 is coated on the surface of the dielectric 6 at a position closer to the left side in the figure so as to reach the left edge, and various alloys with high electrical resistivity are coated at the position closer to the right side in the figure. The structure is such that the resistor 5 is coated so as to reach the right edge, and the electrode 4 and the resistor 5 are electrically connected at the lap portion.

In the example shown in FIG. 8, an electrode 4 reaching one end edge and an extraction electrode 12 are formed on the surface of the dielectric sheet 6, and various alloys with high resistivity are formed between the electrode 4 and the extraction electrode 12. The structure is such that the resistor 5 is formed to be electrically connected to each of the electrode 4 and the extraction electrode 12 using the resistor 5.

To construct the CR composite component, the dielectric sheet 3 shown in FIG. 5 and one or more of the dielectric sheets 6 shown in FIGS. 6 to 8 are overlapped. When a plurality of dielectric sheets 3 and 6 are used, the dielectric sheets 3 and 6 are alternately stacked.

Dummy sheets 7.8 are stacked on both upper and lower surfaces of the dielectric sheets 3.6 stacked as described above, and laminated by means such as heat compression bonding.

In the dielectric sheet 6 shown in FIG. 6, the electrodes 4 and the resistors 5 can be formed in a continuous repeating pattern, so the dielectric sheet 6 can be laminated and then cut into individual units.

The dielectric sheet 3 is heated by heating the above laminate in a furnace.
．． The organic binding material such as the binder in step 6 is removed, and the composite consisting of ceramic, metal, etc. is sintered.

After this, as shown in FIGS. 1 to 3, an external electrode 9 is connected to the electrode 4 at one end of the laminate, an external electrode IO is connected to the resistor 5 at the other end, and the surroundings are formed from the side surface of the intermediate part. A ground external electrode 11 electrically connected to the ground electrode 2 may be formed using, for example, silver paint. The combined part I is completed.

When the CR composite component l formed in this way was used, for example, in a decoupling circuit, R = 1Ω, C = 0.1u.
We were able to obtain the characteristics of F.

Note that at least one dielectric sheet 3 and one dielectric sheet 6 may be used, but in order to increase the capacitance of the capacitor element, as shown in FIG.
4 may be stacked alternately with the dielectric sheets 3 on which the ground electrode 2 shown in FIG. 5 is formed.

In addition, in the dielectric sheet 6 provided with the electrode 4 and the resistor 5, if resistors are provided on both sides of the electrode, the 11th
A CR composite component of the equivalent circuit shown in the figure can be constructed.

Further, in order to reduce the variation in resistance value or the difference between the designed value and the measured value, it is preferable to use a plurality of dielectric sheets 6 shown in FIGS. 6 to 8.

<Effects of the Invention> As described above, according to the present invention, a resistor can be formed inside a capacitor element, and the resistor does not change over time (the environmental resistance is improved, and the reliability of composite parts is improved). Improve your sexuality.

Furthermore, since the resistor is housed inside the capacitor element, it will not be damaged during mounting (and can be mounted on the circuit board using a conventional mounting machine).

Furthermore, the resistor can be formed during the manufacturing process of the capacitor element, and the number of steps can be reduced, making mass production possible and reducing manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the external shape of a CR composite part according to the present invention, FIG. 2 is a longitudinal sectional front view thereof, and FIG. 3 is a longitudinal sectional side view thereof.
Fig. 4 is an exploded perspective view of the main parts of the above, Fig. 5 is a plan view of the dielectric sheet provided with the earth electrode, and Figs. 6 to 8 each show the dielectric sheet provided with the electrode and resistor. FIG. 9 is a plan view of a dielectric sheet with only electrodes formed thereon; FIGS. 1O and 11 are respectively circuit diagrams showing equivalent circuits of CR composite components; FIG. 13 is a front view of a different example of a conventional CR composite part.

Claims (1)

[Claims] A dielectric sheet with a ground electrode formed on the surface reaching the side edges, a dielectric sheet with an electrode and a resistor connected to the electrode formed on the surface reaching both edges, are stacked, and dummy sheets are stacked on both the top and bottom surfaces. An external electrode is provided at one end of the laminate to conduct with the electrode, an external electrode is provided at the other end to conduct to the resistor, and an earth external electrode is provided on the side of the laminate to conduct to the ground electrode. CR composite part with electrodes.