Manufacturing method of laminated sheet, manufacturing method of laminated electronic component, and laminated sheet

Abstract

Provided is a laminated sheet manufacturing method which can easily reduce thickness non-uniformity. A manufacturing method of a laminated sheet 20 according to the present invention comprises: a ceramic green sheet manufacturing step S1 for molding slurry including ceramic powder into a sheet shape and manufacturing ceramic green sheets 21; an internal electrode printing step S2 for printing internal electrodes 12 on the ceramic green sheets 21; an insulating paste placement step S3 for placing an insulation paste 14b, of which a storage elastic modulus E' is 1.0 MPa to 100 Mpa at 80°C and a frequency of 1 Hz, in an area in which the internal electrodes 12 are not printed on the same surface as a surface on which the internal electrodes 12 are printed on the ceramic green sheets 21; a lamination step S4 for laminating the ceramic green sheets 21 on which the internal electrodes 12 are printed and the insulation paste 14b is placed; and a press step S5 for pressing the laminated ceramic green sheets 21 and manufacturing the laminated sheet 20.

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing a laminate sheet, a method for manufacturing a laminate electronic component, and a laminate sheet. [Background technology]

[0002] Multilayer electronic components such as multilayer ceramic capacitors have a structure in which external electrodes are disposed on both ends of a laminate formed by stacking ceramic green sheets on which internal electrodes are printed. However, the ceramic green sheets on which the internal electrodes are printed have steps between the areas where the internal electrodes are printed and the areas where they are not. When these ceramic green sheets are stacked, the steps accumulate, causing unevenness in the thickness of the laminate in the stacking direction, and cracks may occur in the uneven thickness areas during the firing stage.

[0003] For this reason, it has been proposed to place a sheet made of the same material as the ceramic green sheet and of the same thickness as the internal electrodes in the areas on the ceramic green sheet where no internal electrodes are formed, thereby eliminating the steps on the ceramic green sheet (see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 56-94719 Summary of the Invention [Problem to be solved by the invention]

[0005] However, if a sheet made of the same material as the ceramic green sheets and having the same thickness as the internal electrodes and the same dimensions as the gaps between the internal electrodes is to be placed in the gaps, highly accurate thickness control and alignment are required. The present invention aims to provide a method for manufacturing a laminated sheet, a method for manufacturing a laminated electronic component, and a laminated sheet that can more easily reduce thickness non-uniformity. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a method for manufacturing a laminated sheet, comprising: a ceramic green sheet manufacturing process for manufacturing a ceramic green sheet by forming a slurry containing ceramic powder into a sheet; an internal electrode printing process for printing internal electrodes on the ceramic green sheet; an insulating paste disposing process for disposing an insulating paste having a storage modulus E' of 1.0 MPa or more and 100 MPa or less at a frequency of 1 Hz at 80°C in an area of ​​the ceramic green sheet on the same side as the side on which the internal electrodes are printed, without the internal electrodes; a lamination process for laminating the ceramic green sheets on which the internal electrodes are printed and the insulating paste is disposed; and a pressing process for pressing the laminated ceramic green sheets to manufacture a laminated sheet.

[0007] In addition, in order to solve the above-mentioned problems, the present invention provides a method for manufacturing a laminated electronic component, comprising: a cutting process for cutting a laminated sheet manufactured by the above-mentioned laminated sheet manufacturing method to produce a laminated chip; a firing process for firing the laminated chip; and an external electrode formation process for forming external electrodes on both end surfaces of the fired laminated chip.

[0008] Furthermore, the present invention provides a laminated sheet comprising a plurality of laminated ceramic green sheets, each having an internal electrode and, in an area where the internal electrode is not printed, an insulating paste having a storage modulus E' of 1.0 MPa or more and 100 MPa or less at 80°C and a frequency of 1 Hz. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a method for manufacturing a laminate sheet, a method for manufacturing a laminate electronic component, and a laminate sheet that can easily reduce non-uniformity in thickness. [Brief explanation of the drawings]

[0010] [Figure 1]1 is a schematic perspective view of a multilayer ceramic capacitor 1. FIG. [Figure 2] 2 is a cross-sectional view taken along line II-II of the multilayer ceramic capacitor 1 shown in FIG. [Figure 3] 3 is a cross-sectional view of the multilayer ceramic capacitor 1 taken along line III-III shown in FIG. [Figure 4] 1 is a flowchart illustrating a method for manufacturing the multilayer ceramic capacitor 1, including a method for manufacturing the multilayer sheet 20. [Figure 5] 10A and 10B are perspective views illustrating the arrangement of insulating paste 14b on base sheet 23, where (a) is Example 1, (b) is Example 2, (c) is Example 3, (d) is Example 4, and (e) is Example 5. [Figure 6] 10A to 10C are cross-sectional views illustrating the arrangement of insulating paste 14b on base sheet 23, where (a) is Example 1, (b) is Example 2, and (c) is Example 3. FIG. [Figure 7] 10 is a diagram showing the state of the laminated sheet 20 after the pressing step S5. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a method for manufacturing a laminate sheet 20 according to an embodiment of the present invention, a method for manufacturing a multilayer ceramic capacitor 1 as a multilayer electronic component using the laminate sheet 20, and the laminate sheet 20 will be described. Fig. 1 is a schematic perspective view of the multilayer ceramic capacitor 1 using the laminate sheet 20. Fig. 2 is a cross-sectional view taken along line II-II of the multilayer ceramic capacitor 1 shown in Fig. 1. Fig. 3 is a cross-sectional view taken along line III-III of the multilayer ceramic capacitor 1 shown in Fig. 1.

[0012] (Multilayer ceramic capacitor 1) The multilayer ceramic capacitor 1 has a substantially rectangular parallelepiped shape and includes a laminate 2 and a pair of external electrodes 3 provided on both ends of the laminate 2. The laminate 2 includes an inner layer portion 10 in which a plurality of dielectric layers 11 and a plurality of internal electrodes 12 are laminated.

[0013] In the following description, the direction in which a pair of external electrodes 3 are provided in the multilayer ceramic capacitor 1 will be referred to as the length direction L. The direction in which the dielectric layers 11 and the internal electrodes 12 are stacked will be referred to as the stacking direction T. The direction intersecting both the length direction L and the stacking direction T will be referred to as the width direction W. In the embodiment, the width direction W is perpendicular to both the length direction L and the stacking direction T.

[0014] In the following description, of the six outer peripheral surfaces of the laminate 2, a pair of outer peripheral surfaces facing in the stacking direction T will be referred to as main surfaces A, a pair of outer peripheral surfaces facing in the width direction W will be referred to as side surfaces B, and a pair of outer surfaces facing in the length direction L will be referred to as the first end surface Ca and the second end surface Cb, and when there is no need to particularly distinguish between the first end surface Ca and the second end surface Cb, they will be collectively referred to as end surfaces C.

[0015] (Laminate 2) The laminate 2 includes an inner layer portion 10 and outer layer portions 7 disposed on both main surfaces A of the inner layer portion 10.

[0016] (Inner layer 10) The inner layer portion 10 comprises a plurality of dielectric layers 11, internal electrodes 12 arranged between the plurality of dielectric layers 11, and an insulator 14a filling the portions between the plurality of dielectric layers 11 where the internal electrodes 12 are not arranged.

[0017] (Dielectric layer 11) The dielectric layer 11 is formed by sintering ceramic green sheets 21 obtained by forming a slurry into a sheet from a mixture of ceramic powder, such as BaTiO3, a glass component, and optionally a sintering aid, to which a binder, additives such as a plasticizer and a dispersant, and an organic solvent are added. The storage modulus E' of the ceramic green sheets 21 before sintering at 80°C and 1 Hz is generally in the range of 0.5 GPa to 1.0 GPa. The storage modulus E' is the component of energy generated by external forces and strains in an object that is stored inside the object.

[0018] (Internal electrode 12) The internal electrode 12 is formed by sintering an internal electrode paste containing metal powder, such as Ni, a binder, additives such as a plasticizer and a dispersant, an organic solvent, etc. The internal electrode 12 includes a plurality of first internal electrodes 12A and a plurality of second internal electrodes 12B. The first internal electrodes 12A and the second internal electrodes 12B are arranged alternately.

[0019] (First inner electrode 12A) The first internal electrode 12A includes, in the longitudinal direction L, a first opposing electrode 12Aa facing the second internal electrode 12B, and a first extraction electrode 12Ab extracted from the first opposing electrode 12Aa toward the first end face Ca. An end of the first extraction electrode 12Ab is exposed at the first end face Ca and is electrically connected to a first external electrode 3A described below.

[0020] (Second internal electrode 12B) The second internal electrode 12B includes a second counter electrode 12Ba facing the first internal electrode 12A in the longitudinal direction L, and a second extraction electrode 12Bb extracted from the second counter electrode 12Ba toward the second end face Cb. An end of the second extraction electrode 12Bb is exposed at the second end face Cb and is electrically connected to a second external electrode 3B described below.

[0021] Hereinafter, unless it is necessary to distinguish between the first internal electrode 12A and the second internal electrode 12B, they will be collectively referred to as internal electrodes 12. Unless it is necessary to distinguish between the first counter electrode 12Aa and the second counter electrode 12Ba, they will be collectively referred to as counter electrodes 12a. Unless it is necessary to distinguish between the first extraction electrode 12Ab and the second extraction electrode 12Bb, they will be collectively referred to as extraction electrodes 12b.

[0022] (insulator 14a) The insulator 14a, like the ceramic green sheet 21, is made by sintering an insulating paste containing ceramic powder made of, for example, BaTiO3, and, if necessary, a sintering aid, a binder, additives such as a plasticizer or a dispersant, and an organic solvent. The storage modulus E' of the dried coating film 14b of the insulating paste before sintering at 80° C. and 1 Hz is 1.0 MPa or more and 100 MPa or less. 2, the end of the first opposing electrode 12Aa on the second end face Cb side, where the first extraction electrode 12Ab is not extracted, is spaced apart from the second end face Cb, and an insulator 14a is filled between the first opposing electrode 12Aa and the second end face Cb. Also, the end of the second opposing electrode 12Ba on the first end face Ca side, where the second extraction electrode 12Bb is not extracted, is spaced apart from the first end face Ca, and an insulator 14a is filled between the second opposing electrode 12Ba and the first end face Ca.

[0023] 3, both sides of the first internal electrode 12A in the width direction W are spaced apart from the side surface B, and an insulator 14a is filled between the first internal electrode 12A and the side surface B. Furthermore, both sides of the second internal electrode 12B in the width direction W are spaced apart from the side surface B, and an insulator 14a is filled between the second internal electrode 12B and the side surface B.

[0024] (Laminated Sheet 20 and Method for Manufacturing Multilayer Ceramic Capacitor 1 Using Laminated Sheet 20) Next, a description will be given of a method for manufacturing the laminate sheet 20 and a method for manufacturing the multilayer ceramic capacitor 1 using the laminate sheet 20. Fig. 4 is a flowchart illustrating a method for manufacturing the multilayer ceramic capacitor 1, including a method for manufacturing the laminate sheet 20.

[0025] (Ceramic green sheet production process S1) First, a ceramic powder, a glass component, and optionally a sintering aid are mixed together to prepare a mixture, to which additives such as a binder, a plasticizer, a dispersant, and an organic solvent are added to prepare a slurry. Next, the slurry is placed on a carrier film, squeezed into a sheet using a doctor blade, and then dried to produce a ceramic green sheet 21. The storage modulus E' of the ceramic green sheet 21 at 80°C and 1 Hz is generally in the range of 0.5 GPa to 1.0 GPa.

[0026] (Internal electrode printing process S2) Next, an internal electrode paste containing metal powder, binder, additives such as plasticizers and dispersants, organic solvents, etc. is printed in a band-like pattern in a desired shape and thickness by screen printing, inkjet printing, gravure printing, etc. on the produced ceramic green sheet 21, and then dried to form a patterned internal electrode 12.

[0027] (Insulating paste placement process S3) A base sheet 23 is produced by disposing an insulating paste 14b on the ceramic green sheet 21 on which the internal electrodes 12 are formed, in the area where the internal electrodes 12 are not printed. The insulating paste 14b contains ceramic powder, such as BaTiO3, and optionally a sintering aid, a binder, additives such as plasticizers and dispersants, and an organic solvent, but differs in storage modulus E' at 80°C and a frequency of 1 Hz. While the storage modulus E' of ceramic green sheets 21 at 80°C and a frequency of 1 Hz is generally in the range of 0.5 GPa to 1.0 GPa, the storage modulus E' of insulating paste 14b is significantly lower, being 1.0 MPa to 100 MPa at 80°C and a frequency of 1 Hz. The storage modulus E' of insulating paste 14b can be adjusted to 1.0 MPa to 100 MPa by adjusting the amount of a flexible binder, such as PVB, and the plasticizer.

[0028] The insulating paste 14b may be applied to the ceramic green sheet 21 by printing, or the insulating paste 14b may be applied to the ceramic green sheet 21 in a semi-solid state.

[0029] 5A to 5E are perspective views illustrating the arrangement of insulating paste 14b on base sheet 23, where (a) is Example 1, (b) is Example 2, (c) is Example 3, (d) is Example 4, and (e) is Example 5. Fig. 6A to 6E are cross-sectional views illustrating the arrangement of insulating paste 14b on base sheet 23, where (a) is Example 1, (b) is Example 2, and (c) is Example 3.

[0030] Example 1 FIG. 5(a) shows Example 1 in which insulating paste 14b is arranged on a ceramic green sheet 21 around the entire periphery of an internal electrode 12 without any gaps between the internal electrode 12 and the insulating paste 14b, and FIG. 6(a) is a cross-sectional view taken along line XX in FIG. 5(a).

[0031] In Example 1, as shown in Fig. 5(a), the insulating paste 14b is arranged so as to fill gaps extending in the length direction L and width direction W between the internal electrodes 12, and as shown in Fig. 6(a), so that the height in the stacking direction T is approximately the same as that of the internal electrodes 12. In other words, the volume of the gaps between the internal electrodes 12 in the base sheet 23 and the volume of the insulating paste 14b are approximately equal.

[0032] However, the dimensions of the insulating paste 14b in the length direction L and width direction W do not have to strictly match the dimensions of the length direction L and width direction W of the gap between the internal electrodes 12. In addition, the dimension of the insulating paste 14b in the stacking direction T does not have to strictly match the dimension of the internal electrodes 12 in the stacking direction T.

[0033] Example 2 Figure 5(b) shows Example 2 in which insulating paste 14b is arranged on the ceramic green sheet 21 around the entire periphery of the internal electrode 12, but there is a gap between the internal electrode 12, and Figure 6(b) is a cross-sectional view taken along line YY in Figure 5(b).

[0034] In Example 2, the insulating paste 14b is arranged in the gaps extending in the length direction L and width direction W between the internal electrodes 12, as shown in Figure 5(b), so as to be spaced apart from the internal electrodes 12, and also so as to be higher in height in the stacking direction T than the internal electrodes 12, as shown in Figure 6(a).

[0035] The dimensions of this insulating paste 14b in the length direction L, width direction W, and stacking direction T are preferably set so that the total volume of the gaps between the internal electrodes 12 in the base sheet 23 is approximately equal to the total volume of the insulating paste 14b, but they do not have to be strictly equal.

[0036] Example 3 FIG. 5(c) shows Example 3 in which insulating paste 14b is arranged on a ceramic green sheet 21 around the entire periphery of the internal electrode 12 and further overlaps with the internal electrode 12 to cover the upper surface of the outer periphery of the internal electrode 12, and FIG. 6(c) is a cross-sectional view taken along line ZZ in FIG. 5(c).

[0037] In Example 3 as well, it is preferable that the combined volume of the insulating paste 14b arranged between the internal electrodes 12 and the insulating paste 14b covering the upper surface of the outer periphery of the internal electrodes 12 is set to be approximately equal to the volume of the gap between the internal electrodes 12 in the base sheet 23, but it does not have to be strictly the same.

[0038] Example 4 Figure 5(d) shows Example 4 in which insulating paste 14b is arranged around a portion of the internal electrode 12, with a gap between it and the internal electrode 12, and is arranged along the length direction L of the internal electrode 12 in the gap between the internal electrodes 12 adjacent to each other in the width direction W. In Example 4, too, it is preferable that the dimensions of the insulating paste 14b in the length direction L, width direction W, and stacking direction T are set so that the total volume of the insulating paste 14b is approximately equal to the total volume of the gaps between the internal electrodes 12 in the base sheet 23, but they do not have to be strictly equal.

[0039] Example 5 Figure 5(e) shows Example 5 in which insulating paste 14b is arranged around a portion of the internal electrode 12, leaving a gap between the internal electrode 12, and unlike Figure 5(d), is arranged randomly in the gap between the internal electrodes 12 in the width direction W or length direction L. In Example 5, too, it is preferable that the dimensions of the insulating paste 14b in the length direction L, width direction W, and stacking direction T are set so that the overall volume of the insulating paste 14b is approximately equal to the overall volume of the gaps between the internal electrodes 12 in the base sheet 23, but they do not have to be strictly equal.

[0040] In this way, the insulating paste 14b arranged on the ceramic green sheet 21 on which the internal electrodes 12 are formed, in the region where the internal electrodes 12 are not printed, is preferably dried at a temperature of 30°C or higher and 70°C or lower. This drying allows the insulating paste 14b to retain a certain degree of fluidity, but not to the point of running off, and to maintain a certain shape on the ceramic green sheet 21. In this embodiment, the insulating paste 14b is dried at temperatures of 40°C and 60°C. However, the insulating paste 14b may proceed to the next lamination step S4 without drying.

[0041] (Lamination process S4) Next, a laminator is used to laminate multiple layers of base sheet 23 to create the portion that will become inner layer portion 10, and then ceramic green sheets for outer layer portions are laminated above and below the portion that will become inner layer portion 10 in the lamination direction T to produce laminated sheet 20. The ceramic green sheets for the outer layer portions are made of the same material as the ceramic green sheets 21 that form dielectric layers 11.

[0042] 7 is a diagram showing the state of the laminated sheet 20 produced in the lamination step S4 after the next possible stretching step S5. As shown in Fig. 7, the multiple base sheets 23 are arranged so that the internal electrodes 12 face in the same direction of the lamination direction T, and the internal electrodes 12 are shifted by half a pitch between adjacent base sheets 23 in the length direction L and overlap in the width direction W.

[0043] At this time, the portion of the internal electrode 12 that will become the counter electrode 12a is continuously laminated in the lamination direction T. On the other hand, the portion of the internal electrode 12 that will become the extraction electrode 12b is laminated such that portions of the base sheet 23 where the internal electrode 12 is present and portions of the base sheet 23 where the internal electrode 12 is not present are alternately laminated. Therefore, in the laminated sheet 20, the number of laminated internal electrodes 12 in the lamination direction T in the portion that will become the extraction electrode 12b is half the number of laminated internal electrodes 12 in the lamination direction T in the portion that will become the counter electrode 12a. Furthermore, in the width direction W, the internal electrodes 12 of the base sheet 23 are not present on both sides of the portion where the internal electrodes 12 are present.

[0044] However, in this embodiment, the insulating paste 14b is disposed in the areas of the base sheet 23 where the internal electrodes 12 are not present.

[0045] (Pressing process S5) Next, the laminated sheet 20 is pressed. The pressing pressure is between 30 MPa and 150 MPa. The pressures actually used are 50 MPa and 98 MPa. The laminated sheet 20 is placed in a mold, vacuum laminated, and immersed in a hot water bath at 80°C for 10 minutes. The pressure is then increased to approximately 50 MPa, held for 750 seconds, and pressed using an isostatic press.

[0046] At this time, the insulating paste 14b has a storage modulus E' of 1.0 MPa or more and 100 MPa or less at 80° C. and a frequency of 1 Hz, and is a member that is considerably more flexible than the ceramic green sheets 21. Therefore, when pressed in the pressing step S5, the insulating paste 14b deforms and flows in Examples 2, 3, 4, and 5, and is able to fill the gaps between the internal electrodes 12. At this time, in Examples 4, 5, etc., there are also gaps between the internal electrodes 12 where the insulating paste 14b is not placed. However, due to the high fluidity of the insulating paste 14b, the insulating paste 14b flows into these gaps as well, and is able to fill all of the gaps between the internal electrodes 12. In the case of Example 1, the insulating paste 14b is already arranged so as to fill the gaps between the internal electrodes 12, but since it is pressed, it can fill any small gaps that may have occurred during arrangement. As described above, according to the embodiment, a laminated sheet 20 with few steps can be manufactured.

[0047] The flow of the insulating paste 14b may occur not only in the pressing step S5 but also in the laminating step S4.

[0048] (Cutting process S6) The laminate sheet 20 is cut along cutting lines P extending in the width direction W at regular intervals in the length direction L, as shown in Fig. 7, and cutting lines extending in the length direction L at regular intervals in the width direction W. Fig. 7 only shows the cutting lines P extending in the width direction W at regular intervals in the length direction L. In this way, a plurality of laminates 2 are produced.

[0049] (Sintering process S7) Next, each laminate 2 is degreased at a desired temperature profile (about 240°C) to remove the binder, and then sintered at a predetermined temperature profile (about 1200°C). At this time, the insulating paste 14b is sintered to become the insulator 14a.

[0050] (External electrode formation step S8) Then, an external electrode paste containing, for example, Cu as a main component, and made of metal powder, binder, additives (plasticizer, dispersant, etc.), organic solvent, etc., is dip-coated onto the end surface C of the sintered laminate 2, and then dried. Thereafter, the external electrode paste is sintered using a belt furnace to form the external electrode 3. Furthermore, by using a wet electrolytic barrel method or the like, Ni is formed as a first plating film and Sn is formed as a second plating film on the outside of the external electrodes 3, and the multilayer ceramic capacitor 1 is manufactured.

[0051] As described above, the embodiment has the following effects. The laminated sheet 20 in which a plurality of base sheets 23 are laminated has different numbers of internal electrodes 12, and therefore has portions in which the total thickness of the internal electrodes 12 and the dielectric layers 11 in the lamination direction T varies. However, in the embodiment, the insulating paste 14 is disposed in the portions where there are no internal electrodes 12 or where there are a small number of internal electrodes 12. Therefore, the thickness of the laminated sheet 20 in the lamination direction T can be made uniform.

[0052] The insulating paste 14 has a storage modulus E' of 1.0 MPa or more and 100 MPa or less at 80°C and a frequency of 1 Hz, and therefore is easy to flow. Therefore, when arranging the insulating paste 14 in the portion of the ceramic green sheet 21 where the internal electrodes 12 are not present, it is not necessary to strictly match the dimensions of the length direction L and width direction W of the portion where the internal electrodes 12 are not present or the dimension of the stacking direction T of the internal electrodes 12. Even if the dimensions of the insulating paste 14 do not strictly match the dimensions of the internal electrodes 12 in the stacking direction T, the insulating paste 14 can flow when pressed in the pressing step S5 or the like, and fill the portion where the internal electrodes 12 are not present. Therefore, highly accurate thickness control and alignment are not required when placing the insulating paste 14 on the ceramic green sheet 21, and a laminated sheet 20 with a uniform thickness can be easily manufactured.

[0053] The thickness of the laminate 2 obtained by cutting the laminate sheet 20 in the lamination direction T is uniform, so that the possibility of cracks occurring in the sintering step is reduced.

[0054] Furthermore, even when the multilayer ceramic capacitor 1 is finally manufactured, there are no cracks, so that a highly reliable multilayer ceramic capacitor 1 can be provided.

[0055] Furthermore, since the insulating paste 14b has a storage modulus E' at 80°C and 1 Hz of 1.0 MPa or more and 100 MPa or less according to the embodiment, no voids are generated at the end portions in the width direction W after sintering. Furthermore, good performance can be obtained in terms of electrical characteristics.

[0056] Although the preferred embodiment of the present invention has been described above, the present invention is not limited thereto. For example, in the embodiment, when manufacturing the outer layer portion 7, a ceramic green sheet for the outer layer portion made of the same material as the ceramic green sheet 21 forming the dielectric layer 11 is used. However, the present invention is not limited thereto, and the outer layer portion 7 may be made of the same material as the insulating paste 14b. In this case, it is possible to make the surfaces of both main surfaces A of the laminate sheet 21 smoother. That is, when the laminate sheet 21 is cut to form the laminate 2, it is possible to prevent the laminate 2 from becoming drum-shaped due to a reduction in the dimension in the stacking direction T on the outer periphery. Since the laminate 2 does not become drum-shaped, it is easy to form folds when applying the external electrodes 3. [Explanation of symbols]

[0057] 1. Multilayer ceramic capacitors 2. Laminate 3 External electrode 7 Outer layer 10 Inner layer 11 Dielectric layer 12 Internal electrode 12a Counter electrode 12b Extraction electrode 14a Insulator 14b Insulating paste 20 Laminated Sheet 21 Ceramic green sheet 23 Base Sheet

Claims

1. a ceramic green sheet preparation step of forming a slurry containing ceramic powder into a sheet shape to prepare a ceramic green sheet; an internal electrode printing step of printing internal electrodes on the ceramic green sheets; an insulating paste applying step of applying an insulating paste to an area of ​​the ceramic green sheet on the same surface as the surface on which the internal electrodes are printed, where the internal electrodes are not printed; a lamination step of laminating the ceramic green sheets on which the internal electrodes are printed and the insulating paste is disposed; a pressing step of pressing the stacked ceramic green sheets to produce a laminated sheet; Including, a step of drying the insulating paste before the laminating step; The method for producing a laminated sheet, wherein the insulating paste after drying has a storage modulus E' of 1.0 MPa or more and 100 MPa or less at 80°C and a frequency of 1 Hz.

2. The insulating paste after drying is arranged spaced apart from the internal electrodes. A method for producing the laminate sheet according to claim 1.

3. The insulating paste after drying is arranged so as to overlap a part of the internal electrode. A method for producing the laminate sheet according to claim 1.

4. The insulating paste after drying is arranged to surround the entire periphery of the internal electrode. A method for producing the laminate sheet according to any one of claims 1 to 3.

5. After drying, the insulating paste is arranged to surround a part of the periphery of the internal electrode. A method for producing the laminate sheet according to any one of claims 1 to 3.

6. A ceramic green sheet preparation step of forming a ceramic powder-containing slurry into a sheet shape to prepare a ceramic green sheet; an internal electrode printing step of printing internal electrodes on the ceramic green sheets; an insulating paste applying step of applying an insulating paste to an area of ​​the ceramic green sheet on the same surface as the surface on which the internal electrodes are printed, where the internal electrodes are not printed; a lamination step of laminating the ceramic green sheets on which the internal electrodes are printed and the insulating paste is disposed; a pressing step of pressing the stacked ceramic green sheets to produce a laminated sheet, a step of drying the insulating paste before the laminating step; The insulating paste after drying has a storage modulus E' of 1.0 MPa or more and 100 MPa or less at 80°C and a frequency of 1 Hz, a cutting step of cutting the laminated sheet to prepare laminated chips; a firing step of firing the laminated chip; an external electrode forming step of forming external electrodes on both end surfaces of the fired laminated chip; A method for manufacturing a laminated electronic component comprising:

7. The multilayer electronic component is a multilayer ceramic capacitor. The method for producing the laminated electronic component according to claim 6 .

8. A laminated sheet comprising a plurality of ceramic green sheets each having an internal electrode and, in an area where the internal electrode is not printed, an insulating paste having a storage modulus E' of 1.0 MPa or more and 100 MPa or less at 80°C and a frequency of 1 Hz after drying, disposed thereon.

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