JP3239726B2 - Method and apparatus for manufacturing multilayer ceramic electronic component - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for manufacturing a multilayer ceramic electronic component such as a multilayer ceramic capacitor and a multilayer piezoelectric element used in various electronic devices.

[0002]

2. Description of the Related Art In recent years, multilayer ceramic electronic components such as multilayer ceramic capacitors have been required to increase the number of internal electrodes to increase the capacity. FIG. 10 shows a partial cross-sectional view of the multilayer ceramic capacitor. In FIG. 10, 1 is an internal electrode, 2 is an external electrode, and 3 is a dielectric layer. The dielectric layer 3 functions as a capacitor by being sandwiched between the plurality of internal electrodes 1. The production of the multilayer ceramic capacitor is performed by laminating a predetermined number of ceramic green sheets on which electrodes are printed, cutting, firing, and forming external electrodes. For this reason, the number of printing steps increases with the increase in the number of layers, and the manufacturing cost is increased.

[0003] In order to reduce the printing cost of the internal electrodes, many methods including screen printing have been studied. Recently, as a printing method replacing screen printing, JP-B-5-25381 and JP-A-3-108
No. 307 proposes a gravure printing method. In this method, an electrode serving as an internal electrode is printed on a ceramic green sheet by a gravure printing method, and this is thermally transferred onto a ceramic green laminate, and a predetermined number of the layers are laminated.

[0004]

In these proposals, the pattern accuracy is high because the internal electrodes are gravure printed on the surface of the ceramic green sheet. However, in a multilayer ceramic capacitor, a plurality of ceramic raw sheets on which the internal electrodes are printed (actually 100 or more) are laminated, and at this time, the misalignment of the internal electrodes in each lamination tends to occur. The misalignment of the internal electrodes will be described with reference to FIG. FIG. 11 is a cross-sectional perspective view of the multilayer ceramic capacitor in which the internal electrode 1 has a multilayer displacement.
When the internal electrodes are shifted as shown in FIG. 11, the characteristics of the product vary, and the yield of the product is reduced.
Product costs increase. Also, the design rules are loosened and productivity is reduced.

Further, in the conventional manufacturing method, it is necessary to prepare a large number of raw ceramic sheets on which the internal electrodes are printed before lamination, so that inventory costs are correspondingly increased.

As described above, conventionally, the ceramic raw sheet was printed without being positioned at the time of printing, so that the printing accuracy was limited. In addition, it is necessary to newly perform alignment at the time of lamination, and there is a limit in lamination accuracy.

The present invention solves the above-mentioned conventional problems, and proposes a method of manufacturing a laminated ceramic electronic component capable of improving not only the printing accuracy but also the lamination accuracy. It is an object of the present invention to provide a method of manufacturing a multilayer ceramic electronic component capable of reducing costs by reducing deviations from the values.

[0008]

Means for Solving the Problems] method of manufacturing a multilayer ceramic electronic component of the present invention in order to solve this problem, base
Ceramics having a thickness of 20 μm or less formed on a film
Only the ceramic raw sheet of the raw sheet
After temporarily fixing the ceramic, the ceramic fixed on the impression cylinder
Press the raw sheet against the intaglio with the raw sheet facing the intaglio.
Ink pattern on the surface of the ceramic raw sheet
After forming, the ceramic on which the ink pattern is formed
One or more layers of internal electricity
Lamination on the surface of the ceramic laminate with built-in poles
After repeating the predetermined number of times, the ceramic green laminate is
It is cut into a shape, fired, and formed with external electrodes .

According to the present invention, the printing is performed in a state where the ceramic green sheet is fixed on the impression cylinder, so that the printing accuracy is high and the ceramic green sheet is laminated on the ceramic green laminate. Can be performed in a fixed state as it is, so that the lamination accuracy can be increased. In addition, positioning at the time of printing or lamination can be performed mechanically with high precision and at high speed on the impression cylinder side. Thus, in the present invention,
The lamination accuracy of the internal electrodes can be improved by 10 times or more as compared with the conventional gravure printing method.

In this way, the printing accuracy of the internal electrodes and the accuracy of the lamination position can be improved, the variation in the capacitance value of the product and the deviation from the standard value can be reduced, and a more inexpensive multilayer ceramic capacitor can be provided.

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is characterized in that after transferring only a ceramic green sheet portion of a ceramic green sheet having a thickness of 20 μm or less formed on a base film to an impression cylinder surface, By transferring and laminating the ink pattern from the intaglio, the base film is not used in the printing or laminating process, so that the base film does not become dirty or stretched, and the base film can be reused. It has the effect of reducing the waste rate.

According to the second aspect of the present invention, it is possible to mechanically position the impression cylinder and the intaglio plate so as to be at the same position between the impression cylinder and the raw ceramic sheet, and in this state, mechanically and alternately mechanically for a fixed distance. By shifting and stacking, higher accuracy and higher speed can be achieved compared to the conventional alignment by image recognition with an ink pattern or alignment with alignment pin holes formed on a weak base film. Having.

According to the third aspect of the present invention, the number of products per sheet can be increased by laminating the sheet while rotating it by 90 degrees, 180 degrees, or 270 degrees every time it is transferred mechanically. It has the action of:

According to a fourth aspect of the present invention, ink patterns to be printed on one ceramic green sheet are simultaneously laminated with different product shapes (such as chip sizes) and product characteristics, for example, 1.6 mm × 0.1 mm. An 8 mm chip size and a 3.2 mm × 1.6 mm chip size can be manufactured at the same time, and the cost for manufacturing a small number and variety of multilayer ceramic electronic components can be reduced.

According to a fifth aspect of the present invention, an elastic body made of rubber or resin is provided on the surface of the impression cylinder at 0.01 mm or more and 50 mm or more.
By forming the ceramic raw sheet with the following thickness, when pressing the ceramic raw sheet against the intaglio or pressing the ceramic raw sheet with the ink pattern against the ceramic green laminate, even if it is a brittle ceramic raw sheet, Since the occurrence of pinholes can be prevented, the yield of the lamination process can be increased.

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 (a) to 1 (f). FIG. 1 shows an example of an apparatus for manufacturing a multilayer ceramic electronic component according to the first embodiment, and particularly illustrates important printing and laminating steps.
(D) shows a step of forming an ink pattern on the positioned ceramic raw sheet. Also, FIG.
(F) shows a step of laminating a ceramic green sheet on which an ink pattern is formed in a positioned state on a surface of a ceramic green laminate having at least one internal electrode fixed in a predetermined position in advance. In FIG. 1, reference numeral 4 denotes an intaglio, and reference numeral 5 denotes an ink pattern formed on the surface of the intaglio 4. Arrow 6 indicates ceramic raw sheet 9 and base film 8 on the surface.
Indicates the direction of movement of the press 7 on which the ink is adsorbed, or the direction of movement of the doctor 10 that forms the ink 11 on the intaglio 4 in the ink pattern 5. Reference numeral 12 denotes a ceramic green laminate, in which one or more internal electrodes 13 are incorporated. The press 7 in the first embodiment is generally called an impression cylinder.

As shown in FIG. 1A, the ink pattern 5
Is pressed in the direction of arrow 6 on the intaglio 4 on which the ceramic raw sheet 9 and the base film 8 are fixed, and the press 7 is pulled up as shown by arrow 6 as shown in FIG. The ink pattern 5 can be transferred and formed on the surface of the ceramic raw sheet 9. Next, as shown in FIG. 1E, the ceramic green sheet 9 on which the ink pattern 5 is formed is pressed against the surface of the ceramic green laminate fixed at a predetermined position as shown in FIG. After the press 7 is moved, the base film 8 is peeled in the direction of arrow 6 as shown in FIG. 1 (f) to transfer the ceramic green sheet on which the ink pattern 5 is formed to the ceramic green laminate. Can be.

In the first embodiment, the ceramic raw sheet 9 can be handled while being fixed to the base film 8, so that it can be handled even if it has a thickness of 5 μm or less. The ink pattern 5 is transferred from the intaglio 4 while the ceramic raw sheet 9 is fixed to the press 7. Then, the press 7 is mechanically positioned on the pre-positioned ceramic green laminate. From the press 7, the ceramic green sheet 9 on which the ink pattern 5 is formed is transferred onto a pre-positioned ceramic green laminate. By performing the steps of FIGS. 1A to 1F a plurality of times, the ceramic green laminate can be laminated with high lamination accuracy (that is, the positional deviation of the plurality of internal electrodes 13 is small).

In the present invention, the press 7 is mechanically aligned on both the intaglio 4 and the ceramic green laminate 12, so that even if the number of laminations is tens to hundreds of times, the internal electrodes 13 The displacement hardly occurs. By using the present manufacturing apparatus in this manner, a multilayer ceramic electronic component can be manufactured with high accuracy and high speed.

This will be described in more detail. The multilayer ceramic electronic component was a multilayer ceramic capacitor as an example, and was manufactured using the manufacturing apparatus of the first embodiment. First, as an electrode material, Pd powder having a particle size of 0.3 μm was dispersed in ethyl cellulose resin and a solvent using a ball mill to form an ink. The intaglio 4 was produced by polishing a copper plate with high precision, etching an electrode pattern, and plating it with Cr. This ink was dropped on the intaglio 4, and an ink pattern 5 was formed using a doctor 10. A base film 8 with a single sheet of raw ceramic sheet 9 was fixed to a press 7. Then, the ceramic raw sheet 9 was pressed against the intaglio 4 as shown in FIGS. 1A and 1B to form an ink pattern 5 on the surface thereof. After the ink pattern 5 is dried on the press 7, the surface of the ceramic green laminate 12 having one or more internal electrodes 13 fixed at a predetermined position as shown in FIGS. 1 (e) to 1 (f). And the ink pattern 5 and the ceramic raw sheet 9 were laminated.

This will be described with reference to FIG. The ceramic green laminate 12 having a thickness of 200 μm was used. After fixing the ceramic green laminate at a predetermined position, the ceramic green sheet 9 on which the ink pattern 5 was formed was transferred from the press 7. In this way, a ceramic green laminate 12 having one or more layers of internal electrodes 13 formed therein corresponding to FIG. This process was repeated a plurality of times, and 100 internal electrodes were stacked. Thereafter, the ceramic green laminate was cut into a predetermined shape, fired, and external electrodes were formed to produce a multilayer ceramic capacitor (hereinafter, referred to as invention product 1).

Next, for comparison, the same 1
An ink pattern was printed on a 0-μm-thick ceramic green sheet (total length: 1000 m) in a continuous rotary printing using a gravure printing method. The ink pattern was read by a CCD camera to recognize the image, and 100 layers were automatically laminated. Then, similarly, it was cut into a predetermined shape, fired, and formed with external electrodes to obtain a multilayer ceramic capacitor (hereinafter referred to as Conventional Product 1).

A comparison of the characteristics of each of 10,000 products between the invention product 1 and the conventional product 1 revealed that the capacity variation of the invention product 1 was 2% and the capacity variation of the conventional product 1 was 14%. Therefore, when the cross section of each product was observed, it was found that 100 layers of internal electrodes were laminated with a displacement of 2 μm or less with high accuracy in Invention Product 1 (in the first embodiment, the base film was directly fixed to the press 7). However, the internal electrodes of the conventional product 1 are randomly displaced as shown in FIG. 11 (the accuracy of image recognition is low and the thin ceramic Due to the poor handling of the sheet), the amount of deviation was at most 30 μm.

The lamination displacement is adjusted to 1005 size (1.0 m
An example of a multilayer ceramic capacitor (m × 0.5 mm) was analyzed as product variation. In the case of the 1005 size, the width of the internal electrode 13 is about 300 μm. Here, when the internal electrodes are displaced by ± 30 μm as in the conventional product 1, the capacity tolerance becomes ± 10% at the maximum. The product standard is B-characteristic (K type) of Hi-k system, tolerance of capacitance ± 10%, and tolerance of TC system is ± 5% or less, ± 30 μm.
In the conventional product 1, the lamination shift greatly reduces the product yield. In the case of the product 1 of the present invention, the lamination displacement is small and the product yield can be increased.

Since the gravure printing used in the conventional product 1 is performed on a ceramic raw sheet having low strength, it is necessary to use a thick base film having high strength, and the cost is high. For this reason, the base film is generally 75 μm
A resin film having a thickness equal to or less than the thickness is used, and the ceramic green sheet formed thereon has poor mechanical strength. Even if a more accurate image recognition device is used to align a film-like object with high accuracy, the alignment accuracy is 20μ due to the pattern recognition accuracy of the CCD camera.
It is difficult to reduce the thickness to m to 30 μm or less. Thus 100
When more than one layer is laminated (especially in a multilayer ceramic capacitor with high precision and high capacity such as B characteristic), each layer has a maximum of ± 30μ
m, it is considered that the capacitance value variation as a product and the deviation from the standard value occurred.

On the other hand, in the case of the invention product 1, since an ink pattern can be formed directly on the ceramic green sheet fixed to the press 7, high lamination accuracy was obtained even when a thin base film 8 of about 25 μm was used. As described above, the base film cost and the manufacturing equipment cost can be reduced. Further, in the case of the manufacturing method and the manufacturing apparatus used in the present embodiment, the time required for alignment and the equipment cost can be reduced to １ ／ or less in total cost as compared with the image recognition of the conventional product 1, so that the productivity is further improved. I could improve.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to FIG. FIG.
(A) to (d) show an example of a method for manufacturing a multilayer ceramic electronic component of the second embodiment.

FIG. 2A shows a state where the ink pattern 5 is transferred and formed on the base film 8 having at least one end fixed and the ceramic green sheet 9 formed on the surface of the base film 8 by using the pressure roll 14. . The pressure roll 14 moves while rotating in the direction of arrow 6 while being pressed against the intaglio 4 from the base film side. Thus, FIG.
As shown in (b), the ink pattern 5 is formed on the ceramic raw sheet 9. Next, the raw ceramic sheet is moved by a certain distance as it is, and is mechanically positioned on the raw ceramic laminate fixed at a predetermined position in advance as shown in FIG. By moving the press 7 as indicated by the arrow 6, the ceramic green sheet 9 on which the ink pattern 5 is formed is transferred to the surface of the ceramic green laminate 12. FIG.
(D) is a view in which the post-transfer press 7 has moved to the arrow 6 to complete a series of steps. Thus, FIGS. 2 (a) to 2 (d)
Since the base film 8 is mechanically positioned each time, the ceramic green laminate fixed at a predetermined position in advance can be subjected to high-precision lamination without positional deviation in each lamination step.

By repeating the steps shown in FIGS. 2A to 2D a plurality of times (for example, 100 times or more), the internal electrodes 13 can always be formed at the same position, and almost no lamination displacement occurs. In the second embodiment, since the ceramic raw sheet 9 can be in the form of a roll (having a length of 100 m or more), printability for printing and lamination of the ceramic green laminate can be improved.

This will be described in more detail. In the second embodiment, the same ceramic raw sheet (long roll of 200 m or more) and the ink pattern 5 as those in the first embodiment are used. First, the long raw ceramic sheet was aligned with the intaglio plate 4. In this alignment, one end of the ceramic green sheet was fixed and the other end was pulled with a constant tension. Fixing is achieved by mechanically chucking both ends of the ceramic raw sheet with a chuck and fixing it at the same time as a puncher (Φ5m)
In m), a plurality of pin holes were formed. Then, as shown in FIGS. 2A and 2B, the ink pattern 5 was transferred and formed on the ceramic raw sheet 9 using the pressing roll 14 while being fixed by the chuck. Next, as shown in FIGS. 2C to 2D, the ceramic green sheet 9 having the ink pattern 5 formed thereon was transferred onto the ceramic green laminate 12. The positioning of the ceramic raw sheet 9 with respect to the ceramic raw laminate 12 was performed using a plurality of pin holes formed at the time of printing. Commercially available pins (Φ
(5 mm, height 5 mm).

In the case of the second embodiment, printing and positioning for pin holes and the like can be performed while at least one end is fixed, so that the relative position with respect to the ink pattern 5 does not shift. Since the layers can be laminated based on the positioning pin holes, the lamination accuracy can be extremely increased.

Thus, a ceramic green laminate 12 having one or more internal electrodes 13 formed therein was produced. This process was repeated a plurality of times, and 100 internal electrodes were stacked. Thereafter, the ceramic green laminate was cut into a predetermined shape, fired, and external electrodes were formed to produce a multilayer ceramic capacitor (hereinafter referred to as invention product 2). Invented product 2 has a capacity variation of 2%, and conventional product 1 (capacity variation is 14%)
It was smaller than. Even when the amount of displacement of the internal electrode was evaluated from the cross section of the invention product 2, the 100-layer internal electrode was 2 μm
Although the layers were stacked with high accuracy with the following shift amount, in the conventional product 1, the internal electrodes were randomly shifted as shown in FIG. 11, and the shift amount was a maximum of 30 μm.

In the second embodiment, since printing and lamination are performed on a continuous base film, the printing speed can be increased and the lamination time can be shortened. Further, as shown in FIG. 2D, peeling of the base film 8 after lamination can be easily performed. In the second embodiment, since positioning is performed by fixing one end of the base film, printing and lamination without a base film (ceramic raw sheet alone) is not performed.
However, a fifth embodiment of the present invention described below also provides a method of printing and laminating without a base film, that is, an ultra-thin ceramic raw sheet alone.

(Embodiment 3) Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a configuration perspective view of the entire apparatus, and 15 is a pin for fixing the ceramic green laminate 12 at a predetermined position. 4 to 6 explain the printing / lamination process in detail. The difference from the first and second embodiments is that a ceramic green sheet is attached to a cylindrical impression cylinder. The intaglio 4 in the third embodiment is plate-shaped, and can be formed by a method of machining with a diamond needle or the etching method described in the second embodiment. In the third embodiment, the raw ceramic sheet is temporarily fixed on the surface of the pressure roll 14 in advance during printing.

The pressure roll 14 is generally called a cylindrical impression cylinder. This will be described in more detail. As a printing medium, the same ceramic green laminate as in FIG. 2 was used with a size of 20 cm square. As the intaglio, a 30 cm square plate machined on a 1 mm thick copper plate and plated with Cr was used. In addition, the same Pd ink as in Embodiment 1 was used. First, as shown in FIG. 4, the ceramic green sheet 9 was fixed to the surface of the pressure roll 14. Then, the ceramic raw sheet 9 wound around the surface of the pressure roll 14 was pressed against the intaglio 4 on which the ink pattern 5 was formed, and the ink pattern 5 was formed on the ceramic raw sheet 9 as shown in FIG. Then, as shown in FIG. 6, the ceramic green sheet 9 on which the ink pattern 5 was formed was transferred onto a ceramic green laminate 12 fixed with pins 15 or the like.

In the case of the manufacturing apparatus according to the third embodiment, since the steps from printing to lamination can be performed continuously by rotating the ceramic raw sheet 9, production costs can be reduced.

By fixing the ceramic green laminates using pins or the like in this manner, the laminates can be alternately shifted by a fixed distance for each lamination. On the other hand, the ceramic green sheets on which the ink patterns are formed are laminated at the same position each time, whereby the internal electrodes can be alternately shifted. Thus, as shown in FIG. 10, the internal electrode 1 can be shifted with higher precision than before. Or 90 degrees for each lamination, 1
The ceramic green laminate can be shifted by 80 degrees or 270 degrees. Also in this case, as shown in FIG. 10, the internal electrodes 1 can be shifted with higher precision than in the conventional case. It should be noted that shifting by a certain distance for each lamination, 90 to 270
The rotation of the degree can be performed not only on the ceramic green laminate side but also on the impression cylinder side. Also in this case, it is possible to perform the shift with higher precision than before.

The transferability of the dried ink pattern can be improved by subjecting the surface of the intaglio to a release treatment so that the ink can be easily removed from the intaglio. As for the intaglio stripping treatment, the inventors disclosed in Japanese Patent Application Laid-Open No. 4-246594.
The method proposed in Japanese Patent Application Laid-Open Publication No. H10-260, can be used. As the material of the intaglio, a resin or glass can be used in addition to the metal, and a long or endless resin film can also be used.

When a long resin film is used, the alignment may be performed using a pin hole or the like formed in the base film or the ceramic raw sheet 9. It can also be used for a continuous (long) ceramic raw sheet by temporarily winding it around the pressure roll 14.

(Embodiment 4) Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 7 shows a cylindrical impression cylinder, that is, a sheet-like ceramic raw sheet 9 wound around a pressure roll 14,
6 shows how the ink pattern is transferred from FIG. FIG. 8 shows a ceramic raw sheet 9 fixed to an impression cylinder,
FIG. 3 is a cross-sectional view showing how the ink pattern is transferred from the cylindrical intaglio plate 16. As shown in Embodiment 4,
By making the intaglio plate cylindrical, the processing accuracy (cylindricity, etc.) of the intaglio plate can be improved, and the printing pressure can be changed from the surface pressure to the linear pressure.

When the cylindrical intaglio 16 is formed into a cylindrical sleeve (both sides tapered cone specification), a commercially available (for general printing) is used.
Gravure plate can be used. As the gravure plate, a net gravure other than the conventional gravure can be used. In the case of this net gravure, a method of exposing the plate from a lith film and a method of directly making a plate using a laser (commonly referred to as a laser plate making) can be used. Versions can be prepared. In particular, by making the sleeve into a cylindrical shape, the plate can be hollow, so that the weight can be reduced and the rigidity can be improved at the same time. In addition, by using tapered cone specifications on both sides, centering of the plate when replacing a plurality of plates (printing pattern drips or bleeds if eccentric) can be performed easily and with high precision.

Also, a long ceramic raw sheet can be diverted to a long ceramic sheet by creating a mechanism that is temporarily wound around the pressure roll 14. Further, by using a plurality of pressure rolls 14, the ink pattern 5 can be transferred from the cylindrical intaglio 16 alternately, so that the productivity can be increased.

As described above, in the fourth embodiment, productivity can be increased at a speed close to continuous printing (rotary printing). The positioning of the ceramic green sheet on which the ink pattern is formed with respect to the ceramic green laminate can be performed at high speed and with high accuracy.

Embodiment 5 Hereinafter, a fifth embodiment of the present invention will be described with reference to FIG. The fifth embodiment describes a state in which printing is performed on an ultra-thin ceramic raw sheet having a thickness of 20 μm or less without using a base film, and the sheets are laminated. This 20 μm or less (5 μm or more and 1
Ultra-thin ceramic green sheets (often about 5 μm) have recently been particularly increased in production in response to demands for smaller and higher-capacity multilayer ceramic capacitors on the market.
Since such an ultra-thin ceramic raw sheet is brittle, the conventional manufacturing method requires 30 to 100 μm in the printing and laminating steps.
Dimensional deviations of the ink pattern to a large extent occurred frequently. In the fifth embodiment, the ceramic raw sheet is directly transferred onto the intaglio plate, and the intaglio plate and the ceramic raw sheet are integrally positioned and transferred onto the positioned ceramic green laminate. It enables high-precision printing and lamination of about 2 μm or less.

This will be described in more detail. First, an ink pattern 5 was formed on the intaglio 4 as shown in FIG.
Next, by laminating the ceramic raw sheet 9 to the intaglio 4, lamination to the ceramic green laminate can be performed without a base film. In the case of a ceramic green sheet of 20 μm or less, the ceramic green sheet is formed on a base film, and the base film is brought into close contact with the intaglio 4 and then only the base film is peeled off.
The state of (b) can be obtained. Since this method does not damage the base film, it is actually 50 μm.
When the experiment was performed using the m base film, it could be reused 10 times or more. We can manufacture multilayer ceramic electronic components considering the future global environment.

The intaglio 4 may be a plate-shaped one as shown in FIG. 9 or a commercially available gravure plate (cylindrical), using the same printing and laminating method to obtain a laminated ceramic. Electronic components can be manufactured.

In the present invention, the ceramic green sheet 9 can be formed directly on the surface of the press 7 or the pressure roll 14 with the support of the base film as described above, even for an ultra-thin ceramic raw sheet of 20 μm or less. For this reason, the base film can be reused in Embodiments 1 to 5.

In the present invention, since the ceramic green sheet can be printed while being wound on an impression cylinder or a pressure roll, the base film or ceramic green sheet in a large area, which has been a problem in the conventional screen printing or gravure continuous printing, is used. The extension of the seat can be prevented. Thus, a large printing area of 300 mm square or more and about 1000 mm square, which was impossible in the present invention, can be printed at a time, and even with this large area, high-precision lamination can be performed without lamination displacement. By taking advantage of this feature, different product shapes and patterns according to product characteristics can be placed on one plate, and printed on the same ceramic green sheet at a time. Thus, it is easy to improve the productivity.

An elastic body made of rubber or resin is provided on the surface of the impression cylinder or the pressure roll in a thickness of 0.01 mm to 50 m.
By coating with a thickness of not more than m, the ceramic raw sheet is not damaged even without a base film during lamination. When the thickness of the coating is less than 0.01 mm, its life is short, and when it exceeds 50 mm, lamination misalignment is likely to occur during lamination on the ceramic green laminate. In the present invention, when a silicone resin was used, a thickness of 0.5 mm was practical.

[0055]

As described above, according to the present invention, the steps of printing and laminating a multilayer ceramic electronic component can both be performed with high precision, so that various multilayer ceramic electronic components can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 illustrates an example of an apparatus for manufacturing a multilayer ceramic electronic component according to a first embodiment.
Explanatory drawing explaining a lamination process

FIG. 2 is an explanatory diagram illustrating an example of a method for manufacturing a multilayer ceramic electronic component according to a second embodiment.

FIG. 3 is a configuration perspective view of the entire apparatus showing a printing / stacking process according to a third embodiment.

FIG. 4 is an explanatory view for explaining a printing / lamination step in Embodiment 3 in detail.

FIG. 5 is an explanatory view for explaining in detail a printing and laminating step according to the third embodiment;

FIG. 6 is an explanatory view for explaining in detail a printing and laminating step according to the third embodiment;

FIG. 7 is an operation explanatory view of an apparatus showing a state in which an ink pattern is transferred from a cylindrical intaglio plate to a single sheet of raw ceramic sheet wound around an impression cylinder according to a fourth embodiment.

FIG. 8 is a cross-sectional view of an apparatus showing a state where an ink pattern is transferred from a cylindrical intaglio plate to a ceramic raw sheet fixed to an impression cylinder according to a fourth embodiment.

FIG. 9 is an explanatory diagram illustrating a state in which an ultra-thin ceramic raw sheet having a thickness of 20 μm or less is printed and laminated without using the base film according to the fifth embodiment.

FIG. 10 is a partial cross-sectional view of a multilayer ceramic capacitor.

FIG. 11 is a cross-sectional view showing a displacement of the internal electrodes of the multilayer ceramic capacitor;

[Explanation of symbols]

 Reference Signs List 4 intaglio 5 ink pattern 6 arrow 7 press 8 base film 9 ceramic raw sheet 10 doctor 11 ink 12 ceramic raw laminate 13 internal electrode 14 pressure roll 15 pin 16 cylindrical intaglio

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Ryo Kimura 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-4-305997 (JP, A) JP-A-7- 74047 (JP, A) JP-A-9-129504 (JP, A) JP-A-7-169635 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01G 4/00-4 / 12 H01G 4/14-4/42 H01G 13/00-13/06

Claims (6)

(57) [Claims] 1. 20 μm formed on a base film
After temporarily fixing only the ceramic green sheet of the following ceramic raw sheet to the impression cylinder surface, the ceramic green sheet fixed on the impression cylinder is pressed against the intaglio in a state of facing the intaglio plate to form an ink pattern. Is formed on the surface of the ceramic green sheet, and then it is determined that the ceramic green sheet on which the ink pattern is formed is laminated on the surface of the ceramic green laminate having at least one internal electrode fixed in a predetermined position. A method of manufacturing a multilayer ceramic electronic component, comprising, after repeating a number of times, cutting the ceramic green laminate into a predetermined shape, firing, and forming external electrodes. 2. A mechanism for mechanically positioning the impression cylinder so as to be always at the same position with respect to both the intaglio and the ceramic green laminate fixed at a predetermined position. It has a mechanism to press against both, and the ceramic green laminate containing one or more layers of internal electrodes is mechanically shifted by a certain distance every time the ceramic green sheet with the ink pattern is transferred. An apparatus for manufacturing a multilayer ceramic electronic component having: 3. A mechanism for mechanically positioning the impression cylinder so as to be always at the same position with respect to both the intaglio and the ceramic green laminate fixed at a predetermined position. A ceramic green laminate having a mechanism for pressing against both of them and having one or more layers of internal electrodes built therein is 90 degrees, 180 degrees, or 270 degrees each time a ceramic green sheet on which an ink pattern is formed is transferred.
A manufacturing device for multilayer ceramic electronic components having a mechanism for rotating by degrees. Printed size of the ceramic green sheet wherein the ink pattern, the method of production of a multilayer ceramic electronic component according to claim 1, wherein at 300mm or 1000mm or less. 5. A plurality of ink patterns printed on one ceramic green sheet having different product shapes or different product characteristics. After a predetermined number of laminations are obtained, the plurality of ink patterns are divided by product shape or product characteristics. 2. The method for manufacturing a multilayer ceramic electronic component according to claim 1 , wherein after obtaining the various types of ceramic green laminate, the ceramic green laminate is cut into a predetermined shape, fired, and external electrodes are formed. 6. A mechanism for mechanically positioning the impression cylinder with respect to both the intaglio and the ceramic green laminate fixed at a predetermined position so that the impression cylinder is always at the same position. It has a mechanism for pressing against both the body, on the surface of the impression cylinder, according to claim elastic body made of rubber or resin is formed with a thickness of 50mm or more 0.01 mm 2 or claim 3 An apparatus for manufacturing the multilayer ceramic electronic component according to the above.