JPH10199334A - Conductive paste composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain internal electrode with high dispersibility by laminating ceramic sheets coated with the conductive paste containing first metal powder, sintered with lower temperature than sintering temperature of unsintering ceramic sheets, and a second metal organic compound with higher melting point than that of first metal powder. SOLUTION: A metal organic compound being composed of at least one of the chain hydrocarbon sulfide in which principal chain is a straight chain or cyclic hydrocarbon sulfide with benz-group, is functioned as a retardant for excess sintering of a first metal and high dispersibility in conductive paste composition with organic solvent is capable to obtain. The chain hydrocarbon molecule has 8 or more carbons and conductive paste composition contains as a solvent terpineol solvent or higher alcohol solvent. And high retardant effect for excess sintering is obtained by using as the first metal, one or more kind of metals out of palladium and silver alloy, nickel, copper, and second metal, platinum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement of a conductive paste composition for forming an internal electrode of a multilayer ceramic component.

[0002]

2. Description of the Related Art There are known ceramic laminated parts in which a plurality of sheet-like ceramics are laminated and an internal electrode is provided between the sheet-like ceramics. For example, a multi-chip module (CMC) in which a multilayer ceramic capacitor, a capacitor, a resistor, and the like are configured in a circuit,
An IC package, a multilayer wiring board, or the like is such.
When manufacturing such ceramic laminated parts,
In general, a conductive paste composition containing a predetermined metal powder for forming an internal electrode is formed in a predetermined pattern on each of unfired ceramic sheets (hereinafter, referred to as raw sheets) for forming a plurality of sheet-like ceramics. It is applied by screen printing or the like, laminated and pressed, and fired at a predetermined firing temperature determined according to the composition of the green sheet. As a result, the raw sheet is sintered to form a sheet-like ceramic and bonded to each other, and at the same time, the metal particles are sintered by diffusion from the mutual contact interface to form an internal electrode.

[0003] The above-mentioned sheet-shaped ceramics and internal electrode materials are appropriately selected for each use and type of the ceramic laminated component. For example, in a laminated ceramic capacitor, the sheet-shaped ceramics to be a dielectric layer is made of barium titanate ( A perovskite compound such as BaTiO ₃ ) is generally used. On the other hand, the internal electrode is palladium (Pd),
Palladium-silver (Pd / Ag), nickel (Ni), copper (Cu)
And a conductive paste composition containing the same comprises, for example, an organic solvent such as terpineol (terpineol) or a higher alcohol (such as decanol), and a resin component such as cellulose to impart appropriate viscosity. It is produced by dispersing the above powdered metal in a vehicle.

[0004]

The sintering temperature of barium titanate constituting the dielectric layer is 800 to 1400.
On the other hand, the sintering temperature of the metal powder constituting the internal electrode material is about 1000 (° C.) even for palladium having a relatively high melting point. Therefore, the firing temperature of the multilayer capacitor is often higher than the sintering temperature of the internal electrodes. In such a case, the internal electrodes are heated to a higher temperature after sintering is completed. For this reason, the metal that is further diffused with the rise in temperature and grown by the coalescence of the metals is elongated in the thickness direction (vertical direction) and contracted in the plane direction (lateral direction) by the action of surface tension. As a result, the distance between the metal particles increases. 1 (a) to 1 (d) are diagrams schematically showing this process, wherein (a) is before the sintering of the metal particles 10 is started, (b) is immediately after the sintering is started, and (c) is the sintering is completed. And (d) show the state in which the metal has grown and contracted in the plane direction, respectively. The state shown in (d) is a phenomenon called oversintering, which reduces the cross-sectional area of the internal electrodes in the direction of current flow, and in severe cases, causes disconnection in the plane direction. Of the capacitor characteristics such as the capacitance and the equivalent series resistance may be reduced. The following description is limited to the multilayer capacitor having the above configuration, but such oversintering is similar to other multilayer ceramic parts in which the firing temperature is higher than the sintering temperature of the metal constituting the internal electrodes. Can occur.

[0005] The area reduction and disconnection of the internal electrode due to oversintering as described above are suppressed by, for example, applying a thick conductive paste composition and setting the thickness after firing to, for example, 10 (μm) or more. I can do it. However, in the multilayer ceramic capacitor, the internal electrodes of each layer are provided inside the peripheral portion of the sheet ceramic, and in the manufacturing process, the sheet ceramic and the internal electrodes are firmly adhered by pressing in the laminating direction. Can be Therefore, when the thickness of the internal electrode increases, the difference in thickness between the portion where the electrode is provided and the peripheral portion increases,
The peripheral portions of the upper and lower surfaces are deformed into a tapered shape. This deformation is small and does not cause any particular problem when the number of layers is about 40 or less, but the number of layers is 100 to
If it is increased to about 150 layers, the size will not be ignored.

Therefore, in order to suppress oversintering of the metal powder, a noble metal such as platinum having a higher melting point than the metal constituting the internal electrode is added to the conductive paste composition as an oversintering inhibitor. It has been proposed. If you do this,
Since the oversintering inhibitor is located at the interface between the metal powders and hinders interdiffusion, it inhibits sintering and shrinkage. As a result, the sintering temperature is increased, and a decrease in the electrode area can be suppressed. In addition, since a material having a high melting point can function as an oversintering inhibitor, for example, powder of barium titanate, which is a co-material of the dielectric layer, and organic clay mainly containing montmorillonite However, since these are non-conductive materials, even if oversintering is suppressed, the electrical characteristics of the internal electrodes are reduced, so that sufficient capacitor characteristics cannot be obtained. Therefore,
As the oversintering inhibitor, the above-mentioned noble metal materials are desirable.

When the above-mentioned noble metal such as platinum is added as a powder when used as an oversintering inhibitor, in order to obtain a sufficient oversintering inhibitory effect, 10 (wt. ) The above addition amount is necessary. Since noble metals such as platinum are expensive, an increase in the amount of addition leads to an increase in the manufacturing cost of the multilayer capacitor. Therefore, it is desired that a sufficient effect can be obtained with an addition amount as small as possible. By the way, in consideration of the action of the oversintering inhibitor, it is necessary to reduce the contact area of the interface as much as possible in order to sufficiently suppress the diffusion between the metal powders. Therefore, when a noble metal is added as a powder, it is arranged at the interface of the internal electrode constituent metal with a thickness corresponding to the particle size, so that a large amount is required to sufficiently reduce the contact area. Can be For this reason, it has been proposed to add the above-mentioned noble metal in the form of a liquid metal organic compound (resinate). In this way, the liquid substance can exist at the interface even in a very small amount (that is, thin) as compared with the powder, so that a high effect can be expected with a small addition amount.

However, in the experiments conducted by the present inventors by adding platinum resinate to the above-mentioned multilayer capacitor material, the expected effect was not obtained, and the same effect of suppressing oversintering as in the case of adding powder was not obtained. In order to obtain, the amount of metal component is 20 (%)
On the contrary, a large amount of addition was required. This is probably because platinum resinate is unevenly distributed in the conductive paste composition from the observation result of the internal electrode structure after sintering. Therefore, the present inventors have further conducted experiments using existing and new platinum resinates having various compositions, and found that the solubility or dispersibility of the platinum resinate in an organic solvent for forming the internal electrode constituent metal into a paste was platinum. It has been found that the platinum resinate conventionally used has a low solubility and is unevenly distributed due to a low solubility depending on the composition of the organic compound constituting the resinate. That is, in the conventional conductive paste composition for the above-mentioned applications, sulfides of abietic acid (C ₂₀ H ₃₀ O ₂ ) (metal resin balsam sulfide, etc.) or acetyl An acetonate-based platinum resinate has been used. on the other hand,
In the manufacturing process of multilayer ceramic parts such as multilayer capacitors, organic solvents are limited to terpineol and higher alcohols as described above in order to avoid erosion of the raw sheet by the organic solvent in the conductive paste composition called sheet attack Have been. Since the above-mentioned platinum resinate is hardly soluble in these organic solvents, high dispersibility cannot be obtained, and the platinum resinate is unevenly distributed in the conductive paste composition.

[0009] For example, in Japanese Patent Application Laid-Open No. 6-215980, dibutylaminopropylamine, diethylaminopropylamine, dimethylaminopropylamine and the like are disclosed in Japanese Patent Application Laid-Open No. 6-215980 in order to suppress the uneven distribution due to the low dispersibility of platinum resinate and the like. A conductive paste composition to which an organic solvent having an amino group such as aminopropylamine is added has been proposed. However, such an organic solvent having an amino group decomposes the main chain of a resin such as cellulose which is added to give an appropriate viscosity to the conductive paste composition. It is desirable not to add it because it is easily lacking in preservability and uniformity of the internal electrode, and increases the amount of solvent in the conductive paste composition to lower the density of the internal electrode.

The present invention has been made based on such findings, and an object of the present invention is to provide a conductive paste composition having a high dispersibility of a metal organic compound.

[0011]

In order to achieve the above object, the gist of the present invention is that a plurality of sheet ceramics are stacked and an internal electrode is provided between the sheet ceramics. When manufacturing a ceramic laminated component, it is applied to form the internal electrode on a plurality of unfired ceramic sheets for constituting the plurality of sheet-shaped ceramics, and is a main component of the internal electrode, A first metal powder sintered at a temperature lower than the firing temperature of the unfired ceramic sheet; and a second metal powder having a higher melting point than the first metal powder.
(A) the organic compound constituting the metal-organic compound has a sulfide of a chain hydrocarbon having a main chain of a straight chain and a benz group. That is, it is at least one of a sulfide of a cyclic hydrocarbon.

[0012]

In this way, in the conductive paste composition, the organic compound of the metal organic compound to be added is:
The main chain is composed of at least one of a sulfide of a linear hydrocarbon having a straight chain and a sulfide of a cyclic hydrocarbon having a benz group. Therefore, a metal organic compound in which such an organic compound is combined with a second metal having a higher melting point than the first metal, which functions as an oversintering inhibitor for the first metal, is used as a ceramic laminated component. Since it is soluble in various organic solvents such as terpineol, which is suitably used for paste application to a paste, high dispersibility can be obtained in the organic solvent, that is, in the conductive paste composition. Therefore, the oversintering of the first metal, which is the main component of the internal electrode, can be suppressed with a small amount of addition. In addition, the effect of sufficiently increasing dispersibility can be obtained if only one of the sulfide of the chain hydrocarbon and the sulfide of the cyclic hydrocarbon is used.
When both are used together (ie, a mixture of a metal organic compound of a chain hydrocarbon and a metal organic compound of a cyclic hydrocarbon is used), the dispersibility of the metal organic compound is further enhanced.

[0013]

In another embodiment of the present invention, preferably, the chain hydrocarbon has 8 or more carbon atoms. In this case, since the molecular weight is sufficiently increased, higher dispersibility can be obtained. Since higher dispersibility is obtained as the molecular weight increases, the number of carbon atoms is more preferably 13 or more, and still more preferably 16 or more.

Preferably, the cyclic hydrocarbon has a hydrocarbon group having 3 or more carbon atoms as a substituent. In this case, the molecular weight of the cyclic hydrocarbon is also increased, so that higher dispersibility can be obtained.

[0015] Preferably, the conductive paste composition contains a terpineol-based solvent or a higher alcohol-based solvent as a solvent.

Preferably, the first metal is one or a mixture of two or more of palladium, an alloy (or mixture) of palladium and silver, nickel, and copper, and the second metal is platinum. It is. If you do this,
Palladium or the like is suitable as an internal electrode material because of its high conductivity, but platinum has a sufficiently high melting point than these, so that a high oversintering suppression effect can be obtained.

Preferably, the ceramic multilayer component is a multilayer ceramic capacitor in which the sheet ceramic is made of barium titanate. In this case, the dispersibility of the metal organic compound in the conductive paste composition is increased, and a high oversintering suppressing effect is obtained, and the thickness of the internal electrode can be sufficiently reduced. The thickness can be reduced, and deformation during lamination and compression can be suppressed.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 2 is a view showing a multilayer ceramic capacitor 12 (hereinafter simply referred to as a multilayer capacitor 12) which is an example of a multilayer ceramic component using the conductive paste composition of one embodiment of the present invention. a) shows the appearance, (b)
Indicates the layer configuration separately for each layer. In the figure,
The multilayer capacitor 12 is a chip capacitor having a size of, for example, about 32 × 16 × 10 (mm). As shown in FIG. A pair of external electrodes 14 made of Ag (silver) or the like is provided. Further, as shown in FIG. 2B, the multilayer capacitor 12 has, for example, a thickness constituting a dielectric layer.
A plurality of sheet-like ceramics 16 made of barium titanate (BaTiO ₃ ) of about 10 μm and
It has a structure in which internal electrodes 18 mainly composed of palladium (Pd) of about 2 (μm) are alternately laminated, and the internal electrodes 18 are formed in a smaller area than the sheet-like ceramics 16. In addition, the external electrode 1 is placed every other sheet in the stacking direction.
4, 14 are connected to either one or the other.

FIG. 3 is a diagram showing a manufacturing process of the multilayer capacitor 12 described above. The outline of the manufacturing process will be described with reference to the drawings. First, in a raw material preparation step of step 1, a powdery ceramic raw material (barium titanate) is mixed with a binder solution composed of a molding aid such as polyvinyl butyral or polyethylene glycol, a plasticizer, and the like.
In the sheet forming step of, for example, 15 (μ)
m) A green sheet of about thickness is formed. On one surface of the green sheet, in the internal electrode printing step of step 3, an electrode paste containing palladium as a main component is printed in a predetermined pattern to a thickness of about 5 (μm) by, for example, a thick film screen printing method or the like. In the drying step 4, drying is performed by, for example, hot air or far infrared rays. Then, after laminating, crimping, and cutting to separate individual parts in Steps 5 to 7, in the firing step of Step 8, the raw sheet is fired at a predetermined firing temperature of, for example, about 1400 (° C.). The plurality of sheet-like ceramics 16 are formed by sintering and bonded to each other, and at the same time, the palladium in the electrode paste is sintered to form the internal electrodes 18. Thereafter, in the external electrode forming step of step 9,
The multilayer capacitor 12 is manufactured by, for example, applying and forming the external electrode 14 connected to the internal electrode 18.

The electrode paste used in the internal electrode printing step is, for example, about 40 to 60 (wt%) of palladium powder having a particle size of about 0.2 to 1.0 (μm), and 10 to 20 (wt%) of platinum resinate. The degree is dispersed in a vehicle made of, for example, a terpineol-based organic solvent and a cellulose-based or acrylic-based resin. The above platinum resinates are, for example, as shown in Table 1 below, methyl (CH ₃ ) to t-
Sulfide of a benz cyclic hydrocarbon having one or several substituents a having 1 to 4 carbon atoms such as butyl (C ₄ H ₉ ) (that is, having a benz group), that is, thiophenol (benzenethiol) , And the straight-chain portion of the main chain has 10 carbon atoms
To 15 straight-chain hydrocarbon sulfides (C _10-15 H _21-31 -S), that is, straight-chain thiols (mercaptan = B-SH) combined with platinum; One or both of them are used as a mixture. Although platinum is considered to be bound to sulfur of the organic compound,
The proportion of platinum in the platinum resinate is, for example, 25
About 45 (wt%). Further, a substituent a
Is shown, but it may have two or more substituents a by providing the substituent a at other positions where sulfur is not bonded. In this embodiment, the electrode paste is used for the conductive paste composition, the palladium is used for the first metal, and the platinum is used for the second metal that functions as an oversintering inhibitor for suppressing oversintering of the palladium. Equivalent to.

[0022]

[Table 1] Benz straight chain substituents Soluble carbon number Soluble methyl △ C ₁₀ △ ethyl △ C ₁₁ △ propyl ○ C ₁₂ △ butyl ○ C ₁₃ ○ s-butyl ◎ C ₁₄ ○ t-butyl ◎ C ₁₅ ◎

[0023]

Embedded image

In the above Table 1, "solubility" is the solubility, ie, dispersibility, of platinum resinate in terpineol, and the results determined based on, for example, fluidity (viscosity, etc.) are represented by Δ to ◎. is there. In addition, △ indicates that the resin has a degree of solubility that can be used, ◎ indicates that the compound has an extremely good solubility, and ○ indicates that the compound has an intermediate solubility. As is clear from the table, in the benz system, as the number of carbon atoms of the substituent increases, that is, as the molecular weight increases, and in the linear system, as the number of carbon atoms in the main chain increases, that is, the molecular weight increases. The higher the solubility, the higher the dispersibility in terpineol.

In preparing the above-mentioned electrode paste, for example, the above-mentioned platinum resinate is dissolved in an organic solvent such as terpineol and mixed with the above-mentioned palladium powder and vehicle, and then kneaded by, for example, a three-roll mill. To make the palladium powder into a paste. At this time, the electrode paste contains 0.1 to 10 (wt%) of platinum in the form of a metal organic compound (platinum resinate) based on the total amount of palladium. The resinate shows high solubility in terpineol, ie good dispersibility. Therefore, when the electrode paste is printed in the internal electrode printing step of the above step 3 and dried in the drying step of the step 4, platinum resinate uniformly dispersed in the conductive paste adheres around the palladium powder particles. It will be. Thus, in the firing step of step 8, the palladium powder particles are sintered while being covered with the platinum thin film. At this time, since the melting point of platinum is about 1770 (° C.) and higher than that of palladium at about 1550 (° C.), the diffusion reaction between palladium powder particles is suppressed,
By reducing the sinterability, palladium, that is, oversintering of the internal electrode 18 is suppressed. Therefore, even when the internal electrode 18 is formed by printing with a small film thickness as described above, a decrease in electrical characteristics due to oversintering is suppressed, and the multilayer capacitor 12 having high capacitor characteristics can be manufactured.

That is, as shown in FIG. 4, the relationship between the amount of the electrode paste (Laydown value) and the resistance of the internal electrode 18 formed from the electrode paste is shown. In the range where the amount is sufficiently large, the amount of adhesion and the resistance value are in a proportional relationship. It tends to increase rapidly. The above “adhesion amount” is a weight per unit area, and is a thickness of the electrode paste applied, that is, the internal electrode 18.
Of the thickness. Therefore, the resistance value is originally proportional to the “adhesion amount”, but in a region where the adhesion amount is lower than the boundary value Lc, the proportional relationship is lost. This is considered for the following reasons. The internal electrode 18 of the multilayer capacitor 12 is a porous body having a large number of pores 20 as shown in an enlarged manner in FIG. Note that FIG. 5 is obtained by firing without stacking the raw sheets to which the electrode paste was applied experimentally. The formation of such pores 20 is described in FIG.
The main cause is oversintering as shown in FIG. 5, but the electrode area is reduced by the total area of the pores 20 as is clear from FIG. Therefore, the pores 20 are more likely to be formed as the coating thickness is reduced, the area of the internal electrode 18 is reduced at an accelerated rate, and furthermore, the sintering in a sea-island manner cuts off the connection with other parts. Since a portion that does not substantially function as an electrode is likely to occur, the proportional relationship between the amount of adhesion and the resistance value is lost when the film thickness is reduced as described above.

For this reason, in general, when manufacturing the multilayer capacitor 12, in order to avoid a large change in the resistance value due to a variation in the coating thickness, the application amount of the electrode paste is proportional to the adhesion amount and the resistance value. Is maintained at the lower limit L
Set to a range that is about 10 to 20 (%) larger than c. However, since the internal electrode 18 is formed in a smaller area than the sheet-like ceramic 16 as described above,
The thicker the inner electrode 18 is, the more the outer electrode 1
4 are easily deformed in a tapered shape, and the production cost is increased due to an increase in the amount of metal contained in the internal electrode 18. Therefore, the thickness of the internal electrode 18 is made as thin as possible. Is desired. In this case, according to the present embodiment, since the thickness of the internal electrode 18 can be reduced as described above based on the suppression of oversintering of palladium, the multilayer capacitor 12 having high capacitor characteristics can be reduced. Can be manufactured at cost.

Although it is difficult to detect the dispersion state of platinum resinate in the electrode paste, the degree of suppression of oversintering of the internal electrode 18 and the proportional relationship between the adhesion amount and the resistance value shown in FIG. The quality of the dispersed state can be indirectly determined based on the lower limit Lc maintained. For example, it is considered that oversintering can be sufficiently suppressed with a small amount of addition, or that if the lower limit Lc decreases, a good dispersion state is obtained.

In short, according to this embodiment, in the electrode paste, the added organic compound of platinum resinate (metal organic compound) is at least one of a straight-chain thiol having a straight-chain main chain and a thiophenol having a benz group. It is composed of one. Therefore, since the platinum resinate in which such an organic compound and platinum functioning as a supersintering inhibitor are combined is soluble in an organic solvent such as terpineol, high dispersibility is obtained in the electrode paste. . Accordingly, oversintering of palladium, which is a main component of the internal electrode 18, can be suppressed with a small amount of addition.

According to the present embodiment, the linear thiol constituting the platinum resinate has 10 or more carbon atoms. Therefore, the molecular weight of the organic compound is sufficiently increased,
Higher dispersibility can be obtained.

According to this embodiment, the metal which is the main component of the internal electrode 18 is palladium, and platinum added as a sintering inhibitor of the palladium is platinum. In this case, palladium is suitable as an internal electrode material because of its high conductivity, but platinum is more preferable than this.
Since it has a high melting point of 0 (° C.) or more, a high oversintering suppressing effect can be obtained.

In this embodiment, an electrode paste is used for the multilayer capacitor 12 in which the sheet-like ceramic 16 is made of barium titanate. Therefore, as a result of increasing the dispersibility of the platinum resinate in the electrode paste, a high oversintering suppressing effect is obtained, and the thickness of the internal electrode 18 can be sufficiently reduced to about 1 to 2 (μm) as described above. Therefore, deformation at the time of lamination and pressure bonding can be suppressed.

While the embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be embodied in still another embodiment.

For example, in the embodiments, the case where the present invention is applied to the electrode paste for forming the internal electrodes 18 of the multilayer capacitor 12 has been described. However, the present invention relates to a CMC, an IC package, and a ceramic multilayer wiring board. The same applies to other laminated ceramic components.

In the embodiment, while the internal electrode 18 is made of palladium, platinum is added as a sintering inhibitor in the form of resinate. Various metals and alloys such as palladium-silver (Pd / Ag), nickel (Ni), and copper (Cu) can be used as appropriate,
The metal added in the form of a metal organic compound (resinate) as a sintering inhibitor is also appropriately changed depending on the use of the multilayer ceramic component, the firing temperature, the type of the internal electrode material, and the like, for example, Au, Ag, Rh, etc. Can be used. The addition amount of the sintering inhibitor is appropriately changed according to the thickness of the internal electrode 18, the type of the metal as the main component, the firing temperature, and the like.

In the examples, the platinum resinate is a thiophenol having one or several substituents a having 1 to 4 carbon atoms such as methyl to t-butyl and the like, and a straight-chain portion as a main chain. Although one or both of linear thiols having 10 to 15 carbon atoms bonded to platinum were used,
As the substituent a of thiophenol, those having 5 or more, preferably 5 to 6 carbon atoms may be used, and the straight-chain thiol may have 8 or more, preferably 8 to 16 carbon atoms in the straight-chain portion. Can be used. In addition, the organic compound constituting the metal organic compound such as platinum resinate may be a sulfide of a chain hydrocarbon having a straight-chain main chain or a sulfide of a cyclic hydrocarbon having a benz group, in addition to the above. Benzyl mercaptan, those having a substituent on the benzene moiety (pinanyl mercaptan), naphthyl mercaptan and the like can also be used.

In the examples, terpineol was used as the organic solvent constituting the electrode paste. Alternatively, a higher alcohol such as decanol or tridecanol, or a terpene-based alcohol may be used. . Also, the composition of the vehicle is appropriately changed according to the composition of the sheet-shaped ceramics 16 and the type of metal that is the main component of the internal electrode 18.

In the examples, the platinum resinate was previously dissolved in terpineol and then mixed with the palladium powder and the vehicle. However, if sufficient dispersibility can be obtained, the platinum resinate may be directly mixed with the palladium powder and the vehicle. Absent.

In the embodiment, the thickness of the internal electrode 18 is about 1 to 2 (μm). However, the effect of the present invention is that the thickness of the internal electrode 18 is about 1 to 10 (μm). Is obtained in the same manner. However, since the effect of the sintering inhibitor becomes more unnecessary as the thickness increases, a greater effect can be obtained when the thickness is in the range of about 1 to 5 (μm).
A remarkable effect can be obtained when the thickness is about 2 (μm). Note that 1
If the thickness is smaller than about (μm), it is difficult to maintain the continuity of the internal electrodes 18 even if the oversintering is suppressed, so that the sintering suppressing effect is hardly obtained.

In the examples, the conductive paste composition was applied on a raw sheet by a thick film screen printing method. However, the application method is not particularly limited, and for example, a transfer method or an application method using a roll coater or the like. The effect of the present invention can be similarly obtained in the case of applying by the method.

Although not specifically exemplified, the present invention can be variously modified without departing from the gist thereof.

[Brief description of the drawings]

1 (a) to 1 (d) are views for explaining a sintering process of an internal electrode.

FIGS. 2A and 2B are diagrams showing a multilayer ceramic capacitor using the conductive paste composition of the present invention, wherein FIG. 2A is a diagram showing the appearance, and FIG. 2B is a diagram showing the structure of each layer separately.

FIG. 3 is a process chart for explaining a manufacturing process of the multilayer ceramic capacitor of FIG. 2;

FIG. 4 is a diagram illustrating the relationship between the amount of conductive paste attached and the resistance value of an internal electrode.

FIG. 5 is an enlarged view showing an internal electrode after sintering.

[Explanation of symbols]

12: Multilayer ceramic capacitor (multilayer ceramic component) 16: Sheet ceramic 18: Internal electrode

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiho Kawazu 3-36 Noritake Shinmachi, Nishi-ku, Nagoya-shi, Aichi Prefecture Noritake Co., Ltd. No. 1-36, Noritake Co., Ltd.

Claims (5)

[Claims] When manufacturing a ceramic laminated component in which a plurality of sheet-shaped ceramics are laminated and an internal electrode is provided between the sheet-shaped ceramics, a plurality of sheets for constituting the plurality of sheet-shaped ceramics are provided. A first metal, which is applied to form the internal electrode on two green ceramic sheets and is sintered at a temperature lower than a firing temperature of the green ceramic sheet, which is a main component of the internal electrode; A conductive paste composition comprising a powder and a metal-organic compound of a second metal having a higher melting point than the powder of the first metal, wherein the organic compound constituting the metal-organic compound has a main chain Is a linear chain hydrocarbon sulfide having a straight chain and / or a cyclic hydrocarbon sulfide having a benz group. 2. The conductive paste composition according to claim 1, wherein the chain compound has 8 or more carbon atoms. 3. The conductive paste composition according to claim 1, wherein the solvent contains a terpineol-based solvent or a higher alcohol-based solvent. 4. The first metal is one or a mixture of two or more of palladium, an alloy (or mixture) of palladium and silver, nickel, and copper, and the second metal is platinum. 1. The conductive paste composition of 1. 5. The conductive paste composition according to claim 1, wherein the ceramic multilayer component is a multilayer ceramic capacitor in which the sheet-like ceramic is made of barium titanate.