JPH01313917A - Laminated electronic part - Google Patents

Abstract

PURPOSE:To improve operating efficiency, and to enable trimming having high accuracy according to an expected electrostatic capacity value by forming a clearance electrostatic capacity type capacitor composed of a pair of mutually opposed comb-shaped electrodes near the surface layer of a laminated electronic part. CONSTITUTION:A clearance electrostatic capacity type capacitor consisting of a pair of mutually opposed comb-shaped electrodes 13 is shaped near the surface of a laminated type electronic part, and the capacitor is used as an electrostatic capacity adjusting section, thus acquiring constant initial electrostatic capacity without being subject to the effect of the ununiformity of the thickness of a dielectric layer. Consequently, the operating efficiency of trimming is improved, and an electrostatic capacity value obtained is not affected largely even when a quantity of displacement of the position of cutting-in is generated when the mutually opposed electrode sections of the comb-shaped electrodes 13 are trimmed so as to be successively crossed by using a laser trimming device. Accordingly, trimming in which electrostatic capacity is adjustable with high accuracy is enabled.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a multilayer electronic component in which a plurality of dielectric laminated sintered bodies are laminated to form a capacitor between the eyebrows, and further includes:
The present invention relates to a laminated composite component in which a plurality of laminated sintered magnetic materials are laminated to form an inductance between the layers.

[Prior Art] Conventionally, so-called multilayer electronic components are known in which an inductance or a capacitor is formed between the layers of a sintered multilayer body. For example, according to Japanese Utility Model Publication No. 60-28113, as shown in FIGS. 3(a) and (b), a plurality of dielectric laminated sintered bodies 1 and magnetic material laminated sintered bodies 2 are laminated, An inductance and a capacitor are formed between the layers of these laminates, forming a so-called laminate type composite component. As is already known, such laminated L (Jj! joint parts) form a coil consisting of conductor wiring connected in a spiral manner between 20 layers of rectangular magnetic material laminated sintered bodies, and Each end is connected to the external electrode 3 formed on the opposite end face of the magnetic material SSM sintered body to form an inductance part, and the opposing electrodes are connected via the dielectric layer of the rectangular dielectric laminated sintered body 1. The layers form a capacitor,
Each of the counter electrodes is connected to the external electrode 3 to form a capacitor section.

When using the multilayer LC composite component as a filter, it is necessary to adjust the inductance of the inductance section and the capacitance of the capacitor section in order to obtain the desired resonance frequency. This seven is necessary.

Among these, as a means for adjusting the capacitance value of the capacitor section, as is known from the above-mentioned Japanese Utility Model Publication No. 60-28113, the means for adjusting the capacitance value of the capacitor section is as follows. The outermost layer of the electrode layer 4 is preliminarily provided with a plurality of V-shaped notches 5 to form a sawtooth shape, and before mounting this on a circuit board or the like, the above-mentioned A part of the sawtooth-shaped electrode is cut off using a laser trimming device, etc. In the figure, the trimmed part 6),
Thus, the opposing area of the electrode layer facing the sawtooth-shaped electrode via the dielectric layer is adjusted.

[Problems to be Solved by the Invention] However, in the conventional multilayer electronic component described above, the capacitance can be adjusted by adjusting the dielectric layer l.
This is done by adjusting the opposing area of the sawtooth-shaped electrode 4 that faces the electrode layer through the dielectric layer 1.
Due to the non-uniform thickness of the sawtooth-shaped electrode 4 that faces the electrode layer through the dielectric layer 1, which is a capacitance adjusting section, the capacitance of the sawtooth-shaped electrode 4 is large (in contrast, the initial capacitance is large). For this reason, it was necessary to make significant changes to the trimming settings for each individual stacked LC composite component, which had the disadvantage of significantly lowering the efficiency of capacitance adjustment work.

Further, even a slight deviation in the position of the notch 6 when trimming the sawtooth electrode 4 using the laser trimming device can cause the obtained capacitance value to be significantly different from the expected capacitance value. This problem also occurred.

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the prior art, it is an object of the present invention to provide a laminated electronic component that has high working efficiency and can be trimmed with high precision to match the expected capacitance value.

[Means for Solving the Problems] That is, the object of the present invention is to provide a capacitor portion comprising electrode layers provided between layers of a laminated dielectric laminate sintered body and facing each other with the dielectric layer interposed therebetween. , a multilayer electronic component having an external electrode connected to an electrode of the capacitor section, further comprising: near a surface layer of the multilayer electronic component;
This is achieved by a multilayer electronic component characterized by forming a gap capacitance type capacitor consisting of a pair of comb-shaped electrodes facing each other.

[Function] According to the multilayer electronic component according to the present invention, a gap capacitance type capacitor consisting of a pair of comb-shaped electrodes facing each other is formed near the surface of the multilayer electronic component. By using this as the capacitance adjusting section, a constant initial capacitance M can be obtained without being affected by the non-uniform thickness of the dielectric layer. For this reason, the trimming work efficiency is high, and even if a slight deviation in the cut position occurs when trimming the comb-like electrodes so as to successively cross the alternately opposing electrode portions of the comb-like electrodes using a laser trimming device, , does not significantly affect the obtained capacitance value. Therefore, it is possible to trim the capacitance M to Fl with high precision.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

In the attached FIG. 1(a), the laminated electronic component includes a capacitor portion formed by electrodes facing each other with a dielectric layer interposed between the layers of the laminated dielectric laminated sintered body (sheet) 11, and Laminated magnetic material laminated sintered body (sheet) 1
It consists of an inductance section in which a coil is formed between two layers by printed wiring. According to the present invention, a so-called comb-shaped electrode sheet 14 forming a gap capacitance type capacitor by forming comb-shaped electrodes 13, 13 is laminated on the upper surface of the capacitor section. And, such a laminated type L
As shown in FIG. 1(b), the C composite component includes external electrodes 15 and 15 connected to each electrode of the inductance section and the capacitor section as well as the comb-shaped electrodes of the comb-shaped electrode sheet. , are formed on a pair of mutually opposing side surfaces of the laminate.

Adjustment of the capacitance value in a laminated LC composite component having such a configuration is achieved by installing a gap capacitance type capacitor consisting of a pair of comb-shaped electrodes 13.13 facing each other near the surface layer of the laminated composite component. This is done by adjusting this part as a capacitance adjustment part. That is, as shown by the reference numeral 16 in FIG. 1(b), the comb-shaped electrodes 13.13 are made to cross alternately opposing electrode portions of the comb-shaped electrodes by a method such as laser trimming or sandblasting. The electrode area of the comb-shaped electrodes that are alternately opposed to each other is adjusted. Therefore, even if a slight positional shift occurs during this trimming, it does not significantly affect the obtained capacitance value, and highly accurate capacitance trimming is possible.

In addition, the initial capacitance of the gap capacitance type capacitor consisting of a pair of comb-like electrodes 13.13 constituting the capacitance adjustment section is largely influenced by the thickness of the dielectric layer 11. Therefore, the expected capacitance value can be obtained.

Therefore, it is not necessary to significantly change the trimming setting value for each individual stacked LC composite component, and the efficiency of the capacitance adjustment work is significantly increased.

Next, a method for manufacturing the laminated composite component and details of its internal structure will be described with reference to FIG. 2.

First, a slurry was prepared by mixing a magnetic material mainly composed of ferrite with a binder mainly composed of polyvinyl butyral, and the slurry was formed into a sheet shape by a doctor blade method to create a plurality of magnetic sheets 12. and,
A predetermined number (for example, 4 in this example) of the obtained magnetic material sheets) 12 are arranged in a U-shape A.
An inductance portion was formed by applying g-electrode paste 17. That is, first, three of the four sheets 12 are provided with through holes 18 for forming so-called through holes at predetermined locations, and then the inner wall surfaces of the through holes 18 and the four sheets are Ag electrode paste 17 was applied in a U-shape onto one main surface of electrode 12 so that one end was in contact with the through hole 18 . Thereafter, these magnetic sheets 12 were dried to obtain a so-called coil conductor printed sheet.

Next, a slurry is prepared by mixing ceramic material powder mainly composed of T i O2 with a binder mainly composed of polyvinyl butyral, and this is also formed into a sheet by the doctor blade method to form a plurality of dielectric sheets.
made. Then, the obtained plurality of dielectric sheets 1
For three of the sheets, an Ag electrode paste was printed at a predetermined position on one main surface of each sheet to obtain electrode-printed dielectric sheets having rectangular electrodes 19.

In addition, on the other one of the dielectric sheets 11, a so-called comb-shaped electrode sheet is formed by screen printing Ag electrode paste on one main surface to form a pair of comb-shaped electrodes 13 and 13. )14 were made. This comb-shaped electrode 13.13 is
The comb-teeth portions are provided so as to interlock alternately at a certain distance apart, and connecting portions 20 for connecting the respective comb-teeth portions of the comb-teeth electrodes are led out to the opposing edges of the dielectric sheet 110. did.

Next, four of the coil conductor printed sheets 12 coated with Ag electrode paste 17 in a U-shape as described above are used, and the respective U-shaped electrodes 17 and the through-hole conductors are successively connected to form a spiral coil conductor. They were laminated to form a . Then, each end of the spiral coil conductor is led out to the mutually opposing end of the laminate, and six magnetic sheets 12 are laminated on both sides of the laminate. An inductance section was formed.

Furthermore, electrode printing i! has an electrode 19 printed with Ag electrode paste in a rectangular shape! Three dielectric sheets 11 were stacked so that their rectangular electrodes 19 faced each other to form a capacitor with the dielectric sheets 11 in between. moreover,
One end of these opposing rectangular electrodes 19 was led out to the mutually opposing end surfaces of the laminate, and two of the dielectric sheets 11 were laminated on each of the bidirectional surfaces of the laminate to form a capacitor section. . The comb-like electrode sheet 14 described above was laminated on top of the capacitor section thus obtained.

A laminate constituting the capacitor section was laminated on top of the laminate constituting the inductance section obtained in this way, and the laminate thus obtained was heated at 120° C. and 300 k.
It was crimped at g/c-2. Further, on each of the opposing end faces of the laminate, the ends of the coil conductor 17 led out to the end faces, the ends of the capacitor rectangular electrode 19, and the ends of the comb-shaped electrode 13 are electrically connected. Apply Ag electrode paste to connect the external electrode 15 (first
(shown in Figure (b)) and heated to 800°C in the atmosphere.
A laminated LCD composite part was obtained. In the above embodiment, the comb-shaped electrode is exposed on the surface of the multilayer electronic component, but the shape is not limited to this. It is also possible to laminate dielectric sheets with a thickness that allows for.

In the above embodiments, a laminated WA type LC composite part which is an a'i layer type composite part has been described, but the present invention is not limited to this only. ! It can also be applied to multilayer capacitor parts, etc., in which opposing electrodes are formed between layers of a multilayer sintered body with a dielectric layer interposed therebetween.

[Effects of the Invention] As is clear from the above description, according to the present invention, in a multilayer electronic component, a capacitance adjusting section having a constant initial capacitance can be obtained, so that setting of the trimming capacitance is easy. This makes trimming easier and allows for highly efficient trimming work. In addition, even if there is some misalignment of the notch position during trimming, it does not have a major effect on the capacitance value obtained, making it possible to perform highly accurate trimming that matches the expected capacitance. demonstrate.

[Brief explanation of the drawing]

FIGS. 1(a) and (b) are perspective views showing the structure of a multilayer electronic component according to an embodiment of the present invention, and FIG.
Figures (a) and (b) are exploded views showing the details of the internal structure of the laminated electronic component, and Figures 3 (a) and (b) are perspective views showing the conventional laminated electronic component. be. 11... FA electric multilayer sintered body (sea)) 12...
- Magnetic material laminated sintered body (sheet) 13... comb-shaped electrode 14... comb-shaped electrode sheet 15... external electrode 16
...Trimming part 17...υ-shaped Ag@pole paste 19...Rectangular electrode

Claims (2)

[Claims] (1) Provided between the layers of the laminated dielectric laminated sintered body,
In a multilayer electronic component having a capacitor section consisting of electrode layers facing each other with the dielectric layer interposed therebetween, and an external electrode connected to the electrode of the capacitor section, the multilayer electronic component further includes, near the surface layer of the multilayer electronic component, mutually A multilayer electronic component characterized by forming a gap capacitance type capacitor consisting of a pair of comb-shaped electrodes facing each other. (2) In the laminated electronic component according to claim 1, a magnetic material laminated sintered body is further laminated on the surface opposite to the surface on which the gap capacitance type capacitor is formed. A laminated electronic component characterized by laminating inductance portions made of printed wiring spirally provided between layers.