JP3136871B2 - Multilayer ceramic electronic component with built-in capacitance and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic electronic component, and more particularly, to a multilayer ceramic electronic component having a built-in capacitor, such as a ceramic capacitor or an LC composite component, and a manufacturing method thereof.
Construction method .

[0002]

2. Description of the Related Art For example, as a method of adjusting the capacitance of a multilayer ceramic electronic component having a built-in capacitor, such as a ceramic capacitor or an LC composite component, there is a method of removing internal electrodes using a laser or the like.

A conventional multilayer ceramic capacitor usually has a ceramic layer 21 and internal electrodes 2 as shown in FIG.
2 are alternately and horizontally stacked, and the internal electrodes 22 are drawn out to the opposite end face side of the laminated body 23 of the ceramic layer 21 and the internal electrodes 22 every other layer, and are connected to the external electrodes 24. It is connected. And, for example,
As shown in FIG. 6, by removing a part of the internal electrode 22 together with the ceramic layer 21 from the upper surface 23a side of the stacked body 23 of the ceramic layer 21 and the internal electrode 22 using a laser or the like, the internal electrodes 22 are opposed to each other. The capacitance is adjusted by changing the area.

[0004]

However, in the above-mentioned conventional method, for example, when the capacity adjustment is performed by removing one internal electrode, if the trimming range (that is, the capacity adjustment range) is increased, the cutting area is increased. Have to do it. In order to further increase the trimming range, not only one internal electrode but also a plurality of internal electrodes are cut (for example, a plurality of internal electrodes are cut at a predetermined position, and the total area of the opposing areas of the internal electrodes is reduced). Is significantly changed), and as shown in FIG.
3 needs to be cut to a deep position.

[0005] Therefore, the above-mentioned conventional capacity adjustment methods include:
There is a problem that the mechanical strength of the multilayer ceramic capacitor is reduced, the quality of the ceramic layer is changed over a wide range by the heat of the laser, the Q is reduced, or the weather resistance is significantly deteriorated.

The present invention solves the above-mentioned problems. By cutting a part of a laminated body of a ceramic layer and an internal electrode, mechanical strength and Q are lowered, and weather resistance is remarkable. It is an object of the present invention to provide a multilayer ceramic electronic component with a built-in capacitor capable of adjusting the capacitance over a wide range without causing deterioration, and a method for manufacturing the same.

[0007]

In order to achieve the above object, a multilayer ceramic electronic component with a built-in capacitor according to the present invention (claim 1) has a structure in which a ceramic layer and an internal electrode are laminated to form a ceramic layer. With the internal electrodes facing each other,
First, a predetermined internal electrode is laminated with a ceramic layer and an internal electrode.
Pull out on one of the opposite end faces of the body
Connected to external electrodes formed on both end faces of the laminate.
In the multilayer ceramic electronic component with a built-in capacitor having the above-described structure, the pattern of the internal electrodes is formed by changing the pattern of the laminated body of the ceramic layer and the internal electrodes other than both end surfaces from which the internal electrodes are drawn out.
A face, face-to-face substantially perpendicular to the internal electrodes are formed
A pattern is formed such that a narrow portion having a smaller width than other portions is formed at a position shallower from the predetermined surface (the predetermined surface of the laminated body), and the predetermined position of the predetermined surface of the laminated body is narrowed by the narrowing of the internal electrode.
If the width portion was cut to depth disposed, narrow portions of the inner electrode of the predetermined number is configured to be disconnected
It is characterized by that.

Further, in the present invention (Claim 2), the laminated ceramic electronic component with a built-in capacitor is formed by laminating a ceramic layer and an internal electrode so that the internal electrodes face each other via the ceramic layer and a predetermined internal electrode is formed. , Ceramic layer and inside
Either one of the opposite end faces of the electrode stack
Pull out and external electrodes formed on both end faces of the laminate
Surfaces of the embedded capacitance multilayer ceramic electronic component having a structure connected, the internal electrodes, the laminated body of the ceramic layers and internal electrodes, except end faces of the internal electrode is drawn out to the
Wherein the surface is substantially perpendicular to the surface on which the internal electrodes are formed.
The external electrodes on the predetermined surface (the predetermined surface of the laminate) are formed.
A shallow position from the free area, has a pattern such as width narrower narrow width portion is formed than other parts, the product
A predetermined area of the layer body on which no external electrodes are formed
Position, the narrow portion of the internal electrode is cut to depth disposed, narrow portions of the inner electrode of the predetermined number is cut
By Rukoto, characterized and this <br/> the opposing area of internal electrodes is adjusted.

In the multilayer ceramic electronic component with a built-in capacitor according to the present invention, the number of narrow portions to be formed on each internal electrode is not particularly limited, and one or a plurality of narrow portions may be provided for each internal electrode. Can be formed, and there is no particular limitation on which of the plurality of internal electrodes is provided with the narrow portion, and the narrow portion may be provided on all the internal electrodes. Further, a narrow portion may be provided only on a specific internal electrode.

The built-in capacitor type according to the present invention (claim 3).
The manufacturing method of the multilayer ceramic electronic component includes a ceramic layer and
By laminating internal electrodes, through the ceramic layer
Make the internal electrodes face each other, and
The opposite end faces of the stack of the backing layer and the internal electrode
Pull out to either side and form on both end surfaces of the laminate.
Built-in capacitor type laminated structure having a structure connected to external electrodes
In a method of manufacturing a lamic electronic component, a ceramic layer and
The internal electrode was drawn out as a laminate of internal electrodes
A surface other than both end surfaces, approximately the same as the surface on which the internal electrodes are formed
External electrode on a predetermined surface (predetermined surface of the laminate) of the vertical surfaces
Shallower than the area where no
Inside a pattern where a narrow part is formed
Forming a laminate with electrodes;
The predetermined position of the area of the surface where the external electrodes are not formed,
Cutting to the depth where the narrow part of the internal electrode is provided
To cut a narrow portion of the predetermined number of internal electrodes,
Adjusting the capacitance by adjusting the facing area of
It is characterized by having.

[0011]

In the multilayer ceramic electronic component with a built-in capacitor according to the present invention (claim 1) , the internal electrodes are formed on both sides of the laminated body of the ceramic layer and the internal electrodes.
The outer surface, which is substantially perpendicular to the surface on which the internal electrodes are formed
Of the predetermined surface (the predetermined surface of the laminate), the external electrode is formed.
Having a pattern such that a narrow portion narrower than other portions is formed at a position shallower from a region which is not provided ,
A predetermined position on a predetermined surface in a region where an external electrode is not formed
Was cut to the depth where the narrow part of the internal electrode was disposed.
In this case, the narrow portion of the predetermined number of internal electrodes is cut.
With this configuration , a predetermined number of internal electrodes can be cut at the narrow portion by cutting only a part of the laminate to a predetermined depth without cutting the laminate over a wide range or deep position. Thus, the facing area of the internal electrodes can be adjusted in a wide range. Therefore, the capacitance can be reduced without causing a decrease in mechanical strength due to cutting the laminate in a wide range or a deep position, a decrease in Q due to deterioration of the ceramic layer, or a significant deterioration in weather resistance. Can be adjusted over a wide range.

Further, the built-in capacity type of the present invention (claim 2)
In multilayer ceramic electronic components, the internal electrodes
The internal electrode of the laminate of the
Surface other than both end surfaces, and the surface on which the internal electrodes are formed.
An external power supply of a predetermined surface (predetermined surface of the laminate) of the substantially vertical surfaces
In a position shallow from the area where no pole is formed,
Pattern that forms a narrow part with a narrow width.
And no external electrodes are formed on the predetermined surface of the laminate.
Where the narrow portion of the internal electrode is disposed
It is cut to the depth, and the narrow part of the predetermined number of internal electrodes is
By cutting, the facing area of the internal electrode is adjusted, so that the laminate is cut over a wide area or deep, and the mechanical strength is reduced, and the Q of the ceramic layer is deteriorated due to deterioration. In addition, it is possible to obtain a highly reliable multilayer ceramic electronic component with a built-in capacitor whose capacitance is accurately adjusted without causing significant deterioration of weather resistance or the like.

In the multilayer ceramic electronic component with a built-in capacitor according to the present invention, the number of internal electrodes to be cut, and when a plurality of narrow portions are provided in each internal electrode, the cut portion and the internal electrode to be cut. The adjustment range of the capacitance can be managed by the number of sheets.

In addition, the built-in capacity type of the present invention (claim 3)
The manufacturing method of multilayer ceramic electronic components involves pulling the internal electrodes.
Surfaces other than the exposed end surfaces, on which the internal electrodes are formed.
Of a predetermined surface (a predetermined surface of the laminate) of the surface substantially perpendicular to the
Another shallow position from the area where the external electrode is not formed
A putter that forms a narrow part that is narrower than the part
Forming a laminate with internal electrodes of the
Of the area where the external electrodes are not formed
Cut to the depth where the narrow part of
Cut the narrow part of the number of internal electrodes, and
Adjusting the volume by adjusting the product
So it can cut the laminate over a wide area or deep
Just cut a part of it to a predetermined depth without cutting
To cut a predetermined number of internal electrodes at their narrow portions
Then, the facing area of the internal electrodes can be adjusted in a wide range.
Will be possible. Therefore, the laminate can be
Reduces mechanical strength by cutting to a deep position
Or deterioration of Q due to deterioration of ceramic layer, or weather resistance
Capacitance without causing significant deterioration of performance
Can be adjusted over a wide range.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially exploded perspective view showing a multilayer ceramic electronic component with a built-in capacitor (a chip type multilayer ceramic capacitor in this embodiment ) according to an embodiment of the present invention (the invention of claim 1) .

As shown in FIG. 1, the multilayer ceramic electronic component with a built-in capacitor according to this embodiment is formed by alternately laminating ceramic layers 1 and internal electrodes 2. It is drawn out to the opposite end face of the laminate 3 and is connected to the external electrode 4. The vicinity of the portion of each internal electrode 2 that is drawn out to the end face of the laminate 3 is a narrow portion 2a that is narrower than the other portions.

That is, in this multilayer ceramic electronic component with a built-in capacitor, the pattern of the internal electrode 2 is substantially perpendicular to the surface of the laminate 3 of the ceramic layer 1 and the internal electrode 2 on which the internal electrode 2 is formed. (Upper surface) At a shallow position from 3a,
The pattern is formed such that the narrow portion 2a is formed. However, in the multilayer ceramic electronic component with a built-in capacitor according to the present invention, required characteristics and applications regarding which position of the internal electrode is to be formed with the narrow portion, which internal electrode is to be formed with the narrow portion, etc. Can be appropriately determined in consideration of the above. From the viewpoint of simplifying the manufacturing process, it is desirable that the position where the narrow portion is formed is a position that does not matter the direction such as front and back at the cutting stage.

In this multilayer ceramic electronic component with a built-in capacitor, as shown in FIG.
(Laminated Body Predetermined Surface) By cutting a part of the laminated body 3 from the 3a side to a predetermined depth using, for example, a laser, a narrow portion of a predetermined number of internal electrodes (not shown in FIG. 2) is formed. By cutting, the opposing area of the internal electrode 2 (FIG. 1) as a whole can be adjusted to adjust the capacitance.

In this embodiment, the cut portion (cut portion) 6a
Is only a part of the laminated body 3, and only a part of the laminated body 3 is cut from the upper surface (predetermined surface of the laminated body) 3 a to a predetermined depth, and a predetermined number of the internal electrodes 2 are reduced to the narrow portion 2 a , The facing area of the internal electrodes 2 can be adjusted in a wide range. Accordingly, the capacitance can be reduced without causing a decrease in mechanical strength due to cutting the laminate 3 to a wide range or a deep position, a decrease in Q due to deterioration of the ceramic layer, or a significant deterioration in weather resistance. Can be adjusted over a wide range to obtain a desired capacitance.

In the above embodiment (FIG. 2), the laminate 3
The case where the cut portion 6a is formed by cutting only a part of the right side of FIG. 3 has been described. However, another part is cut (for example, as shown in FIG. 6b), it is also possible to increase the adjustment range of the facing area of the internal electrode 2, that is, the adjustment range of the capacitance.

However, the cutting position and the cutting depth are not limited to those in the above-described embodiment, and the size of the capacitance to be formed, the pattern of the internal electrodes, the lamination pitch, the position of the narrow portion, etc. It is possible to determine a preferred cutting location in consideration of it.

As a means for cutting the laminate, a laser is used because of its excellent workability and the ability to perform trimming quickly even if the cutting amount (trimming amount) is large. Although preferred, various known cutting means other than a laser can be used.

The capacitance built-in multilayer ceramic electronic component (FIGS. 2 and 3) of the above embodiment, in which the capacitance is adjusted by cutting the narrow width portion 2a of the internal electrode 2, is the same as that of the present invention.
(Invention of claim 2) .

FIG. 4 shows the present invention (the first embodiment of the present invention).
It is a partially exploded perspective view showing an embedded capacitance multilayer ceramic electronic component according to another embodiment of the light).

In the multilayer ceramic electronic component with a built-in capacitor according to this embodiment, the internal electrodes 2 having three narrow portions 2a formed at regular intervals are alternately stacked with the ceramic layer 1, and each layer is formed one by one. And is connected to an external electrode 4 formed on the end face side of the laminate 3 including the ceramic layer 1 and the internal electrode 2.

In this multi-layer ceramic electronic component with a built-in capacitor, a plurality of narrow portions 2a are formed in each internal electrode 2. Therefore, by appropriately selecting the cut location and the number of internal electrodes to be cut, the electrostatic capacity can be improved. The capacity can be adjusted more finely.

In the above embodiment, the chip type multilayer ceramic capacitor has been described as an example. However, the present invention is not limited to the chip type multilayer ceramic capacitor, but may be any of various types of multilayer capacitors with built-in capacitors such as ceramic filters (LC composite parts). It can be applied to ceramic electronic components.

In other respects, the present invention is not limited to the above-described embodiment. Specific patterns of internal electrodes such as the number of narrow portions and formation positions, the number of stacked internal electrodes, Regarding the number of internal electrodes to be cut at the width portion, the position to cut the laminate, and the like, various applications and modifications can be made within the scope of the invention.

[0029]

According to the present invention as described above, the embedded capacitance multilayer ceramic electronic component of the present invention (claim 1), the internal electrodes, Se
The internal electrode of the laminate of the lamic layer and the internal electrode
A predetermined surface (predetermined surface of the laminated body) of the surfaces other than the two end surfaces and the surface substantially perpendicular to the surface on which the internal electrodes are formed ,
It has a pattern such that a narrow portion is formed at a shallow position from a region where an electrode is not formed ,
A predetermined position in the area where the internal electrodes are not formed
If the narrow portion of the cut up to the depth disposed, narrow portions of the inner electrodes a predetermined number is configured to be disconnected
Since only a part of the laminate is cut to a predetermined depth, a predetermined number of internal electrodes can be cut at a narrow portion thereof, and the facing area of the internal electrodes can be adjusted in a wide range. . Therefore, the capacitance can be reduced without causing a decrease in mechanical strength due to cutting the laminate in a wide range or a deep position, a decrease in Q due to deterioration of the ceramic layer, or a significant deterioration in weather resistance. Can be adjusted over a wide range, thereby obtaining a multilayer ceramic electronic component with a built-in capacitor.

Further, in the multilayer ceramic electronic component with a built-in capacitor according to the present invention (claim 2) , the internal electrode is formed of a ceramic layer.
And a stack of internal electrodes, both end faces of the internal electrode is drawn out
The external electrode is formed on a predetermined surface (predetermined surface of the laminate) of the surface substantially perpendicular to the surface on which the internal electrode is formed , other than the surface on which the internal electrode is formed.
Narrow portion at a shallow position from that is not the area has a pattern as is formed, the laminate predetermined plane, an external power
The predetermined position in the region where no pole is formed is
The width part is cut to the arranged depth, and
By cutting the narrow part of the internal electrode, the internal electrode
Since the adjustment of the facing area is performed, a decrease in mechanical strength due to cutting the laminate in a wide range or a deep position, a decrease in Q due to deterioration of the ceramic layer, or a deterioration in weather resistance are caused. Thus, a highly reliable multilayer ceramic electronic component with a built-in capacitor whose capacitance is accurately adjusted can be obtained.

Further, in the method of manufacturing a multilayer ceramic electronic component having a built-in capacitor according to the present invention (claim 3), the internal electrode is pulled.
Surfaces other than the exposed end surfaces, on which the internal electrodes are formed.
Of a predetermined surface (a predetermined surface of the laminate) of the surface substantially perpendicular to the
Another shallow position from the area where the external electrode is not formed
A putter that forms a narrow part that is narrower than the part
Forming a laminate with internal electrodes of the
Of the area where the external electrodes are not formed
Cut to the depth where the narrow part of
Cut the narrow part of the number of internal electrodes, and
Adjusting the volume by adjusting the product
So it can cut the laminate over a wide area or deep
Just cut a part of it to a predetermined depth without cutting
To cut a predetermined number of internal electrodes at their narrow portions
Then, the facing area of the internal electrodes can be adjusted in a wide range.
Will be possible. Therefore, the laminate can be
Reduces mechanical strength by cutting to a deep position
Or deterioration of Q due to deterioration of ceramic layer, or weather resistance
Capacitance without causing significant deterioration of performance
Can be adjusted in a wide range.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view showing a multilayer ceramic electronic component with a built-in capacitor according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a multilayer ceramic electronic component with a built-in capacitor according to an embodiment of the present invention in which the capacitance has been adjusted.

FIG. 3 is a perspective view showing a multilayer ceramic electronic component with a built-in capacitor according to an embodiment of the present invention in which the capacitance has been adjusted.

FIG. 4 is a partially exploded perspective view showing a multilayer ceramic electronic component with a built-in capacitor according to another embodiment of the present invention.

FIG. 5 is a partially exploded perspective view showing a conventional multilayer ceramic electronic component with a built-in capacitor.

FIG. 6 is a perspective view showing a conventional multilayer ceramic electronic component with a built-in capacitor in which the capacitance has been adjusted.

FIG. 7 is a perspective view showing a conventional multilayer ceramic electronic component with a built-in capacitor in which the capacitance has been adjusted.

[Explanation of symbols]

Reference Signs List 1 ceramic layer 2 internal electrode 2a narrow portion 3 laminated body 3a surface (upper surface) substantially perpendicular to the surface of laminated body on which internal electrodes are formed 4 external electrode

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01G 4/00-4/40 H01G 13/00-13/06

Claims (3)

(57) [Claims] An internal electrode is opposed to a ceramic layer by laminating the ceramic layer and the internal electrode .
First, a predetermined internal electrode is laminated with a ceramic layer and an internal electrode.
Pull out on one of the opposite end faces of the body
Connected to external electrodes formed on both end faces of the laminate.
In the multilayer ceramic electronic component with a built-in capacitor, the pattern of the internal electrode is formed on a surface of the laminate of the ceramic layer and the internal electrode other than both end surfaces from which the internal electrode is drawn out.
I, where one of the surfaces substantially perpendicular to the plane in which internal electrodes are formed
No external electrode is formed on the fixed surface (predetermined surface of the laminate)
A pattern in which a narrow portion having a width smaller than other portions is formed at a position shallow from the region, and a region where the external electrode is not formed on the predetermined surface of the laminate.
Narrow portion of a predetermined position, when the narrow portion of the internal electrode was cut to depth disposed, the internal electrodes of the predetermined number of
The multilayer ceramic electronic component with a built-in capacitor is characterized in that it is configured to be cut. 2. Laminating a ceramic layer and an internal electrode so that the internal electrodes face each other via the ceramic layer .
First, a predetermined internal electrode is laminated with a ceramic layer and an internal electrode.
Pull out on one of the opposite end faces of the body
Connected to external electrodes formed on both end faces of the laminate.
And the embedded capacitance multilayer ceramic electronic component having a structure, the internal electrodes, the laminated body of the ceramic layers and internal electrodes, wherein
A surface other than both end surfaces from which the internal electrodes are drawn out, and a predetermined surface (stacked surface) substantially perpendicular to the surface on which the internal electrodes are formed.
Body predetermined plane), at a shallow position from a region not formed external electrodes, width than other portions have a pattern such as a narrow narrow width portion is formed, the laminate predetermined plane, Area where external electrodes are not formed
The predetermined position, the is cut narrow portions of the inner electrodes to depth disposed, by narrow portions of the inner electrodes of the predetermined number are cut <br/> cross, the opposing area of the internal electrodes It is adjusted
A multilayer ceramic electronic component having a built-in capacitor. 3. Laminating a ceramic layer and an internal electrode.
The internal electrodes face each other through the ceramic layer,
First, a predetermined internal electrode is laminated with a ceramic layer and an internal electrode.
Pull out on one of the opposite end faces of the body
Connected to external electrodes formed on both end faces of the laminate.
Of multilayer ceramic electronic components with built-in capacitors
In the manufacturing method, the internal electrode is formed as a laminate of a ceramic layer and an internal electrode.
Are the surfaces other than the both end surfaces from which the
A predetermined surface of the surface substantially perpendicular to the formed surface
Surface), shallower than the area where the external electrode is not formed
So that a narrow part narrower than other parts is formed.
For forming a laminate having internal electrodes of various patterns
And a region of the predetermined surface of the laminate where no external electrode is formed
At a predetermined position, where the narrow portion of the internal electrode is disposed.
To cut the narrow part of the specified number of internal electrodes
And adjust the capacitance by adjusting the facing area of the internal electrodes.
And a step of performing
A method for manufacturing a multilayer ceramic electronic component.