阅读说明：本技术 层叠陶瓷电子部件的制造方法 (The manufacturing method of monolithic ceramic electronic component ) 是由 服部贵之 大和雄斗 于 2019-05-21 设计创作，主要内容包括：本发明提供一种能够抑制内部电极发生短路的层叠陶瓷电子部件的制造方法。在层叠陶瓷电子部件的制造方法中包括：制作层叠体的步骤,所述层叠体包括在第一方向上层叠的多个陶瓷层、配置于所述多个陶瓷层之间的多个内部电极、和朝向与所述第一方向正交的第二方向的露出所述多个内部电极的侧面；烧制所述层叠体的步骤；在所烧制的所述层叠体的所述侧面形成侧边缘部的步骤。在该结构中,由于在形成侧边缘部之前烧制层叠体,因此不易发生在烧制时内部电极的变形导致的短路。(The present invention provides a kind of manufacturing method for being able to suppress internal electrode and the monolithic ceramic electronic component of short circuit occurring.The step of including: production laminated body in the manufacturing method of monolithic ceramic electronic component, the laminated body include the side of multiple ceramic layers that upper layer is folded in a first direction, the multiple internal electrodes being configured between the multiple ceramic layer and the multiple internal electrode of exposing towards the second direction orthogonal with the first direction；The step of firing the laminated body；In the step of side for the laminated body fired forms lateral edge portion.In this configuration, due to firing laminated body before forming lateral edge portion, it is not susceptible to the short circuit caused by the deformation of internal electrode when firing.)

1. a kind of manufacturing method of monolithic ceramic electronic component characterized by comprising

The step of making laminated body, the laminated body include multiple ceramic layers that upper layer is folded in a first direction, be configured at it is described more Multiple internal electrodes between a ceramic layer and the exposing towards the second direction orthogonal with the first direction are the multiple interior The side of portion's electrode,

The step of firing the laminated body；

In the step of side for the laminated body fired forms lateral edge portion.

2. the manufacturing method of monolithic ceramic electronic component according to claim 1, it is characterised in that:

In the end shape of the second direction of the multiple internal electrode for the laminated body for being formed with the lateral edge portion At oxide regions.

3. the manufacturing method of monolithic ceramic electronic component according to claim 2, it is characterised in that:

The size of the second direction of the oxide regions is 10 μm or more.

4. the manufacturing method of monolithic ceramic electronic component described in any one of claim 1 to 3, it is characterised in that:

The size of the first direction of the monolithic ceramic electronic component is 0.8mm or more.

5. the manufacturing method of monolithic ceramic electronic component according to any one of claims 1 to 4, it is characterised in that:

The stacking number of the multiple internal electrode is 500 layers or more.

6. the manufacturing method of monolithic ceramic electronic component according to any one of claims 1 to 5, it is characterised in that:

The lateral edge portion is formed using infusion process.

7. the manufacturing method of monolithic ceramic electronic component described according to claim 1~any one of 6, it is characterised in that:

The ceramic electronic components are 1608 sizes or more.

Technical field

Add the manufacturing method of the monolithic ceramic electronic component of lateral edge portion the present invention relates to after.

Background technique

Patent document 1 discloses a kind of large-scale laminated ceramic capacitor.In such large-scale laminated ceramic capacitor, energy The expansion of enough areas of reporting to the leadship after accomplishing a task by internal electrode or the increase of stacking number are come bulky capacitor.Laminated ceramic capacitor example as a result, Can such as electrolytic capacitor be replaced to be used.

In addition, patent document 2 disclose it is a kind of on the laminated body for making internal electrode be exposed to side after add for true Protect the technology of the lateral edge portion of the insulating properties around internal electrode.In the art, lateral edge portion can be made relatively to thinly form, energy Enough areas of reporting to the leadship after accomplishing a task for relatively increasing internal electrode.

Summary of the invention

The technical problems to be solved by the invention

In the technology for adding lateral edge portion after, laminated body and side of the bigger laminated ceramic capacitor of size when firing The difference of the contractive action of edge part is bigger.As a result, as from side from lateral edge portion to laminated body apply stress caused by The deformation of portion's electrode, so being easy to happen the short circuit of internal electrode.

In view of the foregoing, the object of the present invention is to provide a kind of stackings for being able to suppress internal electrode and short circuit occurring The manufacturing method of ceramic electronic components.

Technical teaching for solving the problem was

To achieve the goals above, an aspect of of the present present invention provides a kind of manufacturing method of monolithic ceramic electronic component, should In method, laminated body is made, the laminated body includes multiple ceramic layers that upper layer is folded in a first direction, is configured at the multiple pottery Multiple internal electrodes between enamel coating and the multiple internal electricity of the exposing towards the second direction orthogonal with the first direction The side of pole.

Fire the laminated body.

Lateral edge portion is formed in the side for the laminated body fired.

In this configuration, it due to firing laminated body before forming lateral edge portion, is not susceptible to inside when firing Short circuit caused by the deformation of electrode.

It can also be in the second party of the multiple internal electrode for the laminated body for being formed with the lateral edge portion To end formed oxide regions.

In this configuration, oxide regions are formed about by the side in laminated body, the short circuit of internal electrode becomes increasingly difficult to To occur.In addition, due to forming oxide regions after forming lateral edge portion, so the ruler of oxide regions can be well controllled It is very little.

The size of the above-mentioned second direction of above-mentioned oxide regions may be 10 μm or more.

In this configuration, internal electrode can be effectively inhibited, short circuit occurs.

In above-mentioned monolithic ceramic electronic component, the size of above-mentioned first direction may be 0.8mm or more.

In above-mentioned monolithic ceramic electronic component, the stacking number of above-mentioned multiple internal electrodes is also possible to 500 layers or more.

In these structures, high performance monolithic ceramic electronic component is obtained.

Above-mentioned lateral edge portion can also be formed by infusion process.

In this configuration, it can more efficiently inhibit internal electrode that short circuit occurs.

Invention effect

A kind of manufacturing method for being able to suppress internal electrode and the monolithic ceramic electronic component of short circuit occurring can be provided.

Detailed description of the invention

Fig. 1 is the perspective view of the laminated ceramic capacitor of an embodiment of the invention.

Fig. 2 is the sectional view along A-A ' line of above-mentioned laminated ceramic capacitor.

Fig. 3 is the sectional view along B-B ' line of above-mentioned laminated ceramic capacitor.

Fig. 4 is that the region V of Fig. 3 of above-mentioned laminated ceramic capacitor is expanded the partial cross-sectional view indicated.

Fig. 5 is the flow chart for indicating the manufacturing method of above-mentioned laminated ceramic capacitor.

Fig. 6 is the top view of the laminates prepared in the step S01 of above-mentioned manufacturing method.

Fig. 7 is the perspective view for indicating the laminates of step S02 of above-mentioned manufacturing method.

Fig. 8 is the top view for indicating the laminates of step S03 of above-mentioned manufacturing method.

Fig. 9 is the sectional view for indicating the laminates of step S03 of above-mentioned manufacturing method.

Figure 10 is the sectional view of the state of the side of the laminated body after the step S03 for illustrating above-mentioned manufacturing method.

Figure 11 is the sectional view for indicating the laminated body of step S05 of above-mentioned manufacturing method.

Figure 12 is the partial cross-sectional view for indicating the laminated body of step S06 of above-mentioned manufacturing method.

Figure 13 is the chart for indicating the relationship of size L and short circuit ratio of oxide regions.

Symbol description

10: laminated ceramic capacitor

11: ceramic main body

12,13: internal electrode

12a, 13a: oxide regions

14,15: external electrode

16: laminated body

17: lateral edge portion

18: capacitor forming portion

19: covering part

S: side.

Specific embodiment

In the following, the embodiments of the present invention will be described with reference to the drawings.

Attached drawing suitably indicates orthogonal X-axis, Y-axis and Z axis.X-axis, Y-axis and Z axis are altogether in all the attached drawings Logical.

1, the structure of laminated ceramic capacitor 10

Fig. 1~3 are the figures for indicating the laminated ceramic capacitor 10 of an embodiment of the present invention.Fig. 1 is laminated ceramic capacitors The perspective view of device 10.Fig. 2 is the sectional view of the A-A ' line along Fig. 1 of laminated ceramic capacitor 10.Fig. 3 is laminated ceramic electricity The sectional view of the B-B ' line along Fig. 1 of container 10.

Typically laminated ceramic capacitor 10 is configured to large-scale.In large-scale laminated ceramic capacitor 10, for example, The size of X-direction can be set as to 1.6~5.7mm or so, the size of Y-axis and Z-direction is set as 0.8~5.0mm or so.Separately Outside, the capacitor of laminated ceramic capacitor 10 is typically 100~1000 μ F or so.

The purposes that large-scale laminated ceramic capacitor 10 can be widely applied for requiring bulky capacitor typically can be used in making With the purposes of electrolytic capacitor.As an example, laminated ceramic capacitor 10 can replace the static equipment in tracking exchage In widely used electrolytic capacitor come using.

Laminated ceramic capacitor 10 includes ceramic main body 11, the first external electrode 14, the second external electrode 15.Typically, Ceramic main body 11 is configured to have two end faces towards X-direction, two sides towards Y direction, towards Z-direction The hexahedron of two interareas.

External electrode 14,15 covers the end face of ceramic main body 11, opposite in the X-axis direction across ceramic main body 11.It is external Electrode 14,15 extends from the end face of ceramic main body 11 to interarea and side.As a result, in external electrode 14,15, with X-Z plane Parallel section and the section parallel with X-Y plane are U-shaped.

In addition, the shape of external electrode 14,15 is not limited to shape shown in FIG. 1.For example, external electrode 14,15 can also be with Only extend from the end face of ceramic main body 11 to an interarea, the section parallel with X-Z plane becomes L-shaped.In addition, external electrical Pole 14,15 can not also extend to any interarea and side.

External electrode 14,15 is formed by the good conductor of electricity.As the good conductor for the electricity for forming external electrode 14,15, for example, The metal with copper (Cu), nickel (Ni), tin (SN), palladium (Pd), platinum (PT), silver-colored (Ag), golden (Au) etc. for principal component or conjunction can be enumerated Gold.

Ceramic main body 11 is formed by dielectric ceramics, has laminated body 16 and lateral edge portion 17.Laminated body 16 has towards X Two end faces of axis direction, two side S towards Y direction, two interareas towards Z-direction.Lateral edge portion 17 is distinguished Cover two side S of laminated body 16.

Laminated body 16 has the knot that the flat multiple ceramic layers extended along X-Y plane are laminated in the Z-axis direction Structure.Laminated body 16 has capacitor forming portion 18 and covering part 19.Covering part 19 covers capacitor forming portion 18 above and below Z-direction, Constitute two interareas of laminated body 16.

Capacitor forming portion 18 is configured between multiple ceramic layers, has multiple the first of the sheet extended along X-Y plane Internal electrode 12 and the second internal electrode 13.Internal electrode 12,13 is alternately configured along Z-direction.That is, internal electrode 12, 13 is opposite in the Z-axis direction across ceramic layer.

Internal electrode 12,13 is formed on the entire width of the Y direction of capacitor forming portion 18, is exposed to laminated body 16 Two sides S.In ceramic main body 11, the lateral edge portion 17 of the two sides S by covering laminated body 16 can protect dew well For the internal electrode 12,13 of the two sides S of laminated body 16.

First internal electrode 12 is only drawn to an end face of ceramic main body 11, and the second internal electrode 13 is only to ceramic main body It draws 11 another end face.The first internal electrode 12 is only connect with the first external electrode 14 as a result, and the second internal electrode 13 is only It is connect with the second external electrode 15.

According to this structure, in laminated ceramic capacitor 10, when in the first external electrode 14 and the second external electrode 15 Between apply voltage when, voltage is applied to multiple ceramic layers between the first internal electrode 12 and the second internal electrode 13.As a result, That can accumulate in laminated ceramic capacitor 10, the voltage between the first external electrode 14 and the second external electrode 15 is corresponding Charge.

It is normal using high dielectric in order to increase the capacitor of each ceramic layer between internal electrode 12,13 in ceramic main body 11 Several dielectric ceramics.As the dielectric ceramics of high dielectric constant, for example, can enumerate with barium titanate (BATiO₃) it is representative , the material of perovskite structure comprising barium (Ba) and titanium (Ti).

In addition, ceramic layer can also be by strontium titanates (SrTiO₃), calcium titanate (CaTiO₃), magnesium titanate (MgTiO₃), calcium zirconate (CaZrO₃), zirconium calcium titanate (CA (Zr, Ti) O₃), barium zirconate (BaZrO₃), titanium oxide (TiO₂) etc. composition system constitute.

Internal electrode 12,13 is formed by the good conductor of electricity.It is typical as the good conductor for the electricity for forming internal electrode 12,13 Ground can enumerate nickel (Ni), in addition to this it is possible to enumerate using copper (Cu), palladium (Pd), platinum (Pt), silver-colored (Ag), golden (Au) etc. as The metal or alloy of principal component.

Fig. 4 is that the region V for surrounding the chain-dotted line with Fig. 3 of laminated ceramic capacitor 10 expands the partial cross section indicated Figure.Fig. 4 illustrates the end of the Y direction of internal electrode 12,13.In internal electrode 12,13, in the side S with laminated body 16 The both ends of adjacent Y direction are formed with oxide regions 12a, 13a.

Oxide regions 12a, 13a are made of the oxide of the metallic element comprising constituting internal electrode 12,13.Therefore, oxygen Changing region 12a, 13a has insulating properties.As a result, in laminated ceramic capacitor 10, be able to suppress laminated body 16 side S and its Short circuit occurs for neighbouring internal electrode 12,13.

Oxide regions 12a, 13a of insulating properties do not contribute the formation of capacitor.Therefore, the Y-axis of oxide regions 12a, 13a The size L in direction is bigger, and the capacitor of laminated ceramic capacitor 10 more reduces.But the large-scale laminated ceramic capacitors big in capacitor In device 10, the reduction of capacitor caused by oxide regions 12a, 13a can be considered as in error range.

Therefore, in large-scale laminated ceramic capacitor 10, by increasing oxygen in the range of can ensure necessary capacitor The size L for changing region 12a, 13a can be more reliably prevented from internal electrode 12,13 and short circuit occurs.From this point of view, oxygen The size L for changing region 12a, 13a is preferably 10 μm or more.

In addition, for the ease of observing stepped construction, it is in Fig. 2,3 that the stacking number in total of internal electrode 12,13 is less Ground shows 8 layers.But in large-scale laminated ceramic capacitor 10, bulky capacitor in order to obtain, internal electrode 12,13 it is total Total stacking number is preferably 500 layers or more.

In addition, the basic structure of the laminated ceramic capacitor 10 of present embodiment is not limited to structure shown in Fig. 1~3, energy It is enough suitably to change.For example, the shape of ceramic main body 11 and external electrode 14,15 can be according to 10 needs of laminated ceramic capacitor Size or performance suitably determine.

2, the manufacturing method of laminated ceramic capacitor 10

Fig. 5 is the flow chart for indicating the manufacturing method of laminated ceramic capacitor 10 of present embodiment.Fig. 6~12 are signals Indicate to property the figure of the manufacturing process of laminated ceramic capacitor 10.Hereinafter, according to Fig. 5, suitably referring to Fig. 6~12, to stacking The manufacturing method of ceramic capacitor 10 is illustrated.

2.1 step S01: the preparation of potsherd

In step S01, prepare be used to form capacitor forming portion 18 the first potsherd 101 and the second potsherd 102, with And it is used to form the third potsherd 103 of covering part 19.Potsherd 101,102,103 is configured to using dielectric ceramics as principal component Unfired dielectric raw cook.

Potsherd 101,102,103 is such as being configured to sheet with roll coater or scraper.The thickness root of potsherd 101,102 It is adjusted according to the thickness of the ceramic layer in the capacitor forming portion 18 after firing.The thickness of potsherd 103 can be adjusted suitably.

Fig. 6 is the top view of potsherd 101,102,103.At this stage, potsherd 101,102,103 is not by monolithic Change.Cutting line Lx, Ly when illustrated in Fig. 6 by each 10 singualtion of laminated ceramic capacitor.Cutting line Lx and X-axis are flat Row, cutting line Ly are parallel with Y-axis.

As shown in fig. 6, being formed on the first potsherd 101 in corresponding with the first internal electrode 12 unfired first Portion's electrode 112 is formed with the second unfired internal electrode corresponding with the second internal electrode 13 on the second potsherd 102 113.In addition, not forming internal electrode in third potsherd 103 corresponding with covering part 19.

Internal electrode 112,113 can be by with the thickness with internal electrode 12,13 of the capacitor forming portion 18 after firing Arbitrary conductive paste is coated on potsherd 101,102 and is formed by corresponding thickness.As the coating method of conductive paste, It is, for example, possible to use silk screen print method or gravure printing methods.

On internal electrode 112,113, the gap of the X-direction along cutting line Ly is formed every a cutting line Ly1. The gap of the gap of first internal electrode 112 and the second internal electrode 113 configures in the X-axis direction interlacedly.That is, passing through The cutting line Ly in the gap of the first internal electrode 112 and the cutting line Ly in the gap by the second internal electrode 113 are alternately arranged Column.

2.2 step S02: stacking

In step S02, as shown in fig. 7, being laminated by the potsherd 101,102,103 that will be prepared in step S01 To make laminates 104.In laminates 104, first potsherd 101 corresponding with capacitor forming portion 18 and the second potsherd 102 is alternately laminated in the Z-axis direction.

In addition, in laminates 104, in the upper and lower surface stacking of the Z-direction of alternately laminated potsherd 101,102 Third potsherd 103 corresponding with covering part 19.In addition, in example shown in Fig. 7, each stacking 3 of the every difference of third potsherd 103 Piece, but the piece number of third potsherd 103 can be changed suitably.

Laminates 104 pass through 101,102,103 integration of crimping potsherd.In the crimping of potsherd 101,102,103 When, for example, it is preferable to use hydrostatic pressing pressurization or uniaxial compression etc..Thereby, it is possible to make 104 densification of laminates.

2.3 step S03: cutting

In step S03, as shown in figure 8, by will be in the resulting laminates 104 of the step S02 state fixed with T1 Under cut along cutting line Lx, Ly and make unfired laminated body 116.Laminated body 116 is corresponding with the laminated body 16 after firing. Crush-cutting knife or chopper etc. can be used for example in the cutting of laminates 104.

Fig. 9 is the sectional view for indicating the step of cutting laminates 104 using the cutter device for having crush-cutting knife 200.Such as Fig. 9 A shown in, crush-cutting knife 200 is configured at the state of its front end towards the lower section of Z-direction by the laminates 104 fixed with T1 Z-direction upside.

As shown in the B of Fig. 9, keep crush-cutting knife 200 mobile to the lower section of Z-direction, until the front end of crush-cutting knife 200 is from figure Until state shown in 9 A reaches band T1, laminates 104 are thus cut.Then, as shown in the C of Fig. 9, make crush-cutting knife 200 It is mobile to the top of Z-direction, crush-cutting knife 200 is extracted from laminates 104.

Laminates 104 are singulated into multiple laminated bodies 116 as a result,.The section along X-direction of laminates 104 The side S towards Y direction as laminated body 116.Figure 10 is the layer being illustrated in after being and then singulated in step S03 The amplification sectional view of the state of the side S of stack 116.

Because of sandwiching for foreign matter caused by crush-cutting knife 200, formed on the side S of the laminated body 116 shown in the A of Figure 10 Scar H.Scar H-shaped at during, when crush-cutting knife 200 along laminated body 116 side S draw internal electrode 112, When 113, internal electrode 112,113 is elongated along scar H, to form extension portion R1.

The side S of the laminated body 116 shown in the B of Figure 10 does not form the scar H as shown in the A of Figure 10.But In this case, when crush-cutting knife 200 draws internal electrode 112,113 along the side S of laminated body 116, due to internal electrode 112, it 113 is elongated along side S, also forms extension portion R2.

The side S of the laminated body 116 shown in the C of Figure 10 is attached with conductive foreign matter R3.As in step The foreign matter R3 for being attached to the side S of laminated body 116 is assumed in S03, for example, can illustrate during cutting by internal electrode 112, the metallic foreign body of the generations such as 113 or crush-cutting knife 200.

If extension portion R1, R2 reaches another one from one of internal electrode 112,113 or foreign matter R3 is attached to internal electricity The two of pole 112,113, then internal electrode 112,113 is connected via extension portion R1, R2 or foreign matter R3 each other.In this way, in layer In the side S of stack 116, short circuit will occur for internal electrode 112,113.

In the present embodiment, in the step S03 stage, even if the internal electrode 112,113 in the side S of laminated body 116 Short circuit occurs, short circuit can also be eliminated in later-mentioned step S06 (oxide regions are formed).Therefore, in step S03, must not Eliminate the short circuit of the internal electrode 112,113 in the side S of laminated body 116.

2.4 step S04: it fires

In step S04, fires and pass through the obtained unfired laminated body 116 of step S03.Thus laminated body is obtained 16.The firing temperature of laminated body 116 for example can be set to 1000~1300 DEG C or so using barium titanate class material. Firing can for example carry out under reducing atmosphere or under low oxygen partial pressure atmosphere.

In this way, in the present embodiment, firing the laminated body formed before lateral edge portion 117 in subsequent steps S05 116.Thereby, it is possible to remove the solvent or adhesive that include in unfired laminated body 116 well from side S.Therefore, at this It, being capable of the stable laminated ceramic capacitor 10 of manufacturing quality in embodiment.

2.5 step S05: the formation of lateral edge portion

In step S05, lateral edge portion 17 is formed by the side S of the laminated body 16 after being fired by step S04 to make Make ceramic main body 11.Specifically, in step S05, it is unfired by being formed by using infusion process in the side S of laminated body 16 Lateral edge portion 117 be sintered on the side S of laminated body 16.

More specifically, firstly, as shown in the A of Figure 11, prepare the ceramic slurry SL being contained in container, make to utilize band Another side S that T2 remains the laminated body 16 of a side S is opposite with ceramic slurry SL.It can be by ceramic slurry SL Solvent or the content etc. of binder adjust the thickness of lateral edge portion 117.

Then, by moving laminated body 16 shown in the A of Figure 11 downwards, the side S of laminated body 16 is impregnated in In ceramic slurry SL.Later, as shown in the B of Figure 11, lift laminated body in the state of being attached with ceramic slurry SL on the S of side 16, thus, it is possible to lateral edge portion 117 is formed on the side S of laminated body 16.

Then, by being transferred to laminated body 16 and taking shown in the B of Figure 11 with T2 is different, make laminated body 16 The direction reversion of the Y direction of side S.Then, on another side S of the laminated body 16 of not formed lateral edge portion 117, Unfired lateral edge portion 117 is formed in the same manner as described above.

Also, the laminated body 16 that lateral edge portion 117 is formed on the S of side is fired again.Lateral edge portion 117 is burnt as a result, It ties and becomes lateral edge portion 17, and be sintered on the side S of laminated body 16.The ceramics with lateral edge portion 17 are obtained as a result, Main body 11.

In general, be provided on laminated body 116 after lateral edge portion 117 while firing laminated body 116 and lateral edge portion 117 Method in, due to the difference of laminated body 116 and the contractive action of lateral edge portion 117 to the side S of laminated body 116 application answer Power.Therefore, short circuit caused by the deformation of internal electrode 112,113 becomes easy generation.

The difference of the contractive action of laminated body 116 and lateral edge portion 117 when firing tends to get bigger in the Z-axis direction.Therefore, The laminated ceramic capacitor 10 that size using Z-direction is 0.8mm or more is easy to happen short circuit, uses the size of Z-direction For the laminated ceramic capacitor 10 of 1.25mm or more it is easier that short circuit occurs.

That is, specifically, being held using the laminated ceramic capacitor 10 more than 1608 sizes (1.6mm × 0.8mm × 0.8mm) Short circuit easily occurs, is easier to send out using the laminated ceramic capacitor 10 more than 2012 sizes (2.0mm × 1.25mm × 1.25mm) Raw short circuit.

Unlike this, in the present embodiment, in step S05, in the laminated body 16 being sintered in advance by step S04 Upper formation lateral edge portion 17.That is, laminated body 16 and lateral edge portion 17 are sintered in the different stages.Therefore, in the present embodiment, The difference of the sintering movement of laminated body 16 and lateral edge portion 17 does not become problem.

Therefore, in the present embodiment, even if using the large-scale stacking pottery more than 1608 sizes more than even 2012 sizes Porcelain condenser 10, near the side S of laminated body 16 in internal electrode 112,113 be also not susceptible to deform.Thereby, it is possible to press down The generation of the side S of preparative layer stack 16 and its neighbouring short circuit.

In addition, applying the side S of laminated body 16 by side edge when using present embodiment sintering lateral edge portion 117 The stress that the contraction in portion 117 generates.But since the lateral edge portion 117 that the dipping by ceramic slurry SL is formed has flexibly Property (flexibility), thus inhibit to the side S of laminated body 16 apply stress.

In addition, the method for forming unfired lateral edge portion 117 on the side S of laminated body 16 is not limited to infusion process.Example Such as, potsherd can be used also to replace ceramic slurry SL.In this case, can also be punched by the side S in laminated body 16 Potsherd forms lateral edge portion 117 in the side S of laminated body 16.

2.6 step S06: the formation of oxide regions

In step S06, in the internal electrode 12,13 for foring the ceramic main body 11 of lateral edge portion 17 by step S05 Middle formation oxide regions 12a, 13a.More specifically, as shown in figure 12, by making internal electrode from the side S of laminated body 16 12,13 oxidation carries out to form oxide regions 12a, 13a.

In step S06, though due tos extension portion R1, R2 shown in Fig. 10 or foreign matter R3 etc. in the side of laminated body 16 In the case where internal electrode 12,13 short circuits occur in S, extension portion R1, R2 or foreign matter R3 also can be with internal electrodes 12,13 together oxygen Change.Thus, it is possible to eliminate the short circuit of the internal electrode 12,13 in the side S of laminated body 16.

As long as the forming method of oxide regions 12a, 13a in step S06 can be from the layer being covered in lateral edge portion 17 The side S of stack 16 aoxidizes internal electrode 12,13, is not limited to specific structure.Typically, it can use On one side to the side S of laminated body 16 for oxygen supply, apply the structure of heat treatment to ceramic main body 11 on one side.

For example, it is effective for adding the additive for the oxidation for promoting internal electrode 12,13 to lateral edge portion 17.In the situation Under, it is heat-treated, is carried out along with the diffusion of the additive of the side S from laminated body 16 internal by applying to ceramic main body 11 The oxidation of electrode 12,13 forms oxide regions 12a, 13a.

As an example, it in the case where forming internal electrode 12,13 using nickel, can add to lateral edge portion 17 as rush Into the magnesium of the additive of the oxidation of nickel.The oxidation that the oxide comprising nickel and magnesium is constituted is formed in internal electrode 12,13 as a result, Region 12a, 13a.

In such method using additive, by time of heat treatment that ceramic main body 11 is applied and temperature, Additive amount for the additive of lateral edge portion 17 etc. controls the size L of oxide regions 12a, 13a.Thus, it is possible to will oxidation The size L of region 12a, 13a are adjusted to 10 μm or more.

In general, the size L of oxide regions 12a, 13a is difficult to control in the laminated body 16 before forming lateral edge portion 17. That is, quickly aoxidized in the very wide range of internal electrode 12,13 when the exposed side S from laminated body 16 is for oxygen supply, The size L of oxide regions 12a, 13a is difficult to keep size appropriate as a result,.

At this point, in the present embodiment, can by covered using lateral edge portion 17 laminated body 16 side S it Oxide regions 12a, 13a are formed afterwards, carry out the oxidation of internal electrode 12,13 slowly.Thereby, it is possible to control oxygen well Change the size L of region 12a, 13a.

In addition, the heat treatment for forming oxide regions 12a, 13a in internal electrode 12,13 can also be in step S05 In carried out before being sintered lateral edge portion 117.Thus, it is possible to carry out the sintering of lateral edge portion 117 together by being once heat-treated With the formation of oxide regions 12a, 13a.

2.7 step S07: the formation of external electrode

In step S07, in the X-direction of the ceramic main body 11 that forms oxide regions 12a, 13a by step S06 Both ends form external electrode 14,15, thus make laminated ceramic capacitor 10 shown in Fig. 1~3.It is outer in step S07 The forming method of portion's electrode 14,15 can arbitrarily be selected from well known method.