Murata Manufacturing Co., Ltd.

Akira Hashimoto

Hiroyoshi Takashima

Yoshihiro Kanayama

Kazuhiro Tabata

Shingo Okuyama

Shinichi Kokawa

Takashige Tanabe

Yuichi Ishimoto

Takahiro Nishizawa

In a multilayer ceramic capacitor, when a cross-section obtained by cutting a multilayer body at a position at a central portion in a length direction and defined in a width direction and a layering direction is viewed, a variation in distance in the width direction from a straight line that connects ends of two internal electrodes located outermost in the layering direction to each other to respective ends of internal electrodes is not larger than about 0.2, a first ridgeline portion connecting the straight line that connects the ends of the two internal electrodes to each other to one main surface of the multilayer body has a first curve, a second ridgeline portion that connects one main surface to one side surface of the multilayer body has a second curve, and the first curve is larger in radius of curvature than the second curve.

Multilayer ceramic capacitor

In a print area provided on a peripheral surface of a gravure roll, a plurality of cells are defined by printing-direction walls and perpendicular walls, and each perpendicular wall has a plurality of cuts. In a center portion of the print area, most intersections of the printing-direction walls and the perpendicular walls are defined by T-shaped intersections where the perpendicular walls do not cross the printing-direction walls, but meet the printing-direction walls in a T-shaped arrangement. Preferably, round chamfers are provided at corners where a portion of each printing-direction wall and a portion of each perpendicular wall intersect, and at leading ends of the perpendicular walls pointing toward the cuts.

Photogravure press and method for manufacturing multilayer ceramic electronic component

A method for manufacturing a ceramic electronic component includes first and second gravure-printing steps in which conductive paste and step-reducing ceramic paste are printed on a composite sheet including a ceramic green sheet. A first print mark is printed before the second gravure-printing step is performed, and the position of the first print mark is determined and compared with a desired position of the first print mark before the second gravure-printing step. Then, the second gravure-printing step is performed such that a second print mark is printed at a suitable position with respect to the position of the first print mark.

Method for manufacturing ceramic electronic component and gravure printing method

A method for manufacturing a multilayer ceramic electronic element includes the steps of forming ceramic green sheets having superior surface smoothness and small variations in thickness at a high speed, in which defects such as pinholes are prevented from occurring, and providing internal electrodes and step-smoothing ceramic paste on the ceramic green sheets with high accuracy. The method includes the steps of applying ceramic slurry to a base film by a die coater followed by drying performed in a drying furnace for forming the ceramic green sheets, and performing gravure printing of conductive paste and ceramic paste onto the ceramic green sheets by using a first and a second gravure printing apparatus, respectively. Accordingly, the internal electrodes are formed, and the step-smoothing ceramic paste is provided in regions other than those in which the internal electrodes are formed.

Method for manufacturing multilayer ceramic electronic element

Photogravure pressure and method for manufacturing multilayer ceramic electronic component

A photogravure printing press includes plurality of cells defined by printing-direction walls and substantially perpendicular walls formed in each of image areas on the circumferential surface of a gravure roll. A plurality of substantially perpendicular cuts are formed in each of the substantially perpendicular walls. In the central portion of the image area, each of the substantially perpendicular cuts is formed so as to have a gap greater than the width of each of the printing-direction walls and the substantially perpendicular walls.

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Takefu, Japan

Akira Hashimoto