Production method of multilayer ceramic electronic device

Abstract

A production method of a multilayer ceramic electronic device comprising the steps of forming a first green sheet 10a by first paint on a surface of a carrier sheet 20, forming a first electrode pattern layer 12a by second paint on a surface of the first green sheet 10a, forming a second green sheet 10b by third paint on a surface of the first green sheet 10a having the first electrode pattern layer 12a formed thereon, forming a second electrode pattern layer 12b by fourth paint on a surface of the second green sheet 10b, and forming a third green sheet 10c by first paint on a surface of the second green sheet 10b having the second electrode pattern layer 12b formed thereon; wherein the first paint and the second paint are insoluble to each other, the third paint is insoluble to the first paint and second paint, and the third paint and the fourth paint are insoluble to each other; by which a sheet attack does not arise when forming an electrode pattern layer on a surface of a green sheet, and a short-circuiting defect rate of electronic devices is low.

Description

BRIEF DESCRIPTION OF DRAWINGS

These and other objects and features of the present invention will become clearer from the following description of the preferred embodiments given with reference to the attached drawings, in which:

FIG. 1 is a schematic sectional view of a multilayer ceramic capacitor according to an embodiment of the present invention;

FIG. 2 is a sectional view of a key part showing a production step of a production method of the multilayer ceramic capacitor shown in FIG. 1;

FIG. 3 is a sectional view of a key part showing a production step of a production method of the multilayer ceramic capacitor shown in FIG. 1; and

FIG. 4A and FIG. 4B are pictures of sections of multilayer ceramic capacitors according to examples of the present invention.

Claims

1. A production method of a multilayer ceramic electronic device, comprising the steps of: forming a first green sheet by first paint; andforming a first electrode pattern layer by second paint so as to contact with said first green sheet;wherein said first paint and said second paint are insoluble to each other.

2. The production method of a multilayer ceramic electronic device as set forth in claim 1, wherein a thickness t1 of said first green sheet is 1.0 μm or thinner.

3. The production method of a multilayer ceramic electronic device as set forth in claim 1, comprising the steps of: forming a second green sheet by third paint on a surface of said first green sheet having said first electrode pattern layer formed thereon; andforming a second electrode pattern layer by fourth paint on a surface of said second green sheet;wherein:said third paint is insoluble to said first paint and said second paint; andsaid third paint and said fourth paint are insoluble to each other.

4. The production method of a multilayer ceramic electronic device as set forth in claim 3, wherein a thickness t2 of said second green sheet is 1.0 μm or thinner.

5. The production method of a multilayer ceramic electronic device as set forth in claim 3, comprising the step of forming a third green sheet by said first paint on a surface of said second green sheet having said second electrode pattern layer formed thereon.

6. The production method of a multilayer ceramic electronic device as set forth in claim 5, comprising the steps of: forming a plurality of multilayer units having said first green sheet, said first electrode pattern layer, said second green sheet, said second electrode pattern layer and said third green sheet on a carrier sheet;peeling said carrier sheet from each of said multilayer units; andstacking a plurality of said multilayer units, so that adjacent two multilayer units are in a relationship that said first green sheet included in one of the multilayer units contacts with said third green sheet included in the other multilayer unit.

7. The production method of a multilayer ceramic electronic device as set forth in claim 6, wherein a sum of a thickness t1 of said first green sheet and a thickness t3 of said third green sheet (t1+t3) is equal to a thickness t2 of said second green sheet.

8. The production method of a multilayer ceramic electronic device as set forth in claim 3, wherein: said first paint is organic solvent based paint;said second paint is organic solvent based paint being insoluble to said first paint;said third paint is water based paint being insoluble to said first paint and said second paint; andsaid fourth paint is organic solvent based paint being insoluble to said third paint.

9. The production method of a multilayer ceramic electronic device as set forth in claim 8, wherein said first paint includes at least either one of a butyral resin and an acrylic resin as a binder resin.

10. The production method of a multilayer ceramic electronic device as set forth in claim 8, wherein said third paint includes at least either one of a water-soluble polyvinyl acetal resin and a water-soluble acrylic resin as a binder resin.

11. The production method of a multilayer ceramic electronic device as set forth in claim 1, wherein a first blank pattern layer formed by said first paint is formed to have substantially the same thickness as that of said first electrode pattern layer on a part of a surface of said first green sheet, where said first electrode pattern layer is not formed.

12. The production method of a multilayer ceramic electronic device as set forth in claim 3, wherein a second blank pattern layer formed by said third paint is formed to have substantially the same thickness as that of said second electrode pattern layer on a part of a surface of said second green sheet, where said second electrode pattern layer is not formed.