Stacked ceramic body and production method thereof

Plastic and nonmetallic article shaping or treating: processes – Outside of mold sintering or vitrifying of shaped inorganic... – Involving specified composition of heating atmosphere – other...

Reexamination Certificate

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Details

C264S675000, C264S674000, C156S089120, C156S089180

Reexamination Certificate

active

07063813

ABSTRACT:
This invention provides a stacked ceramic body that prevents reaction between components of dielectric layers and components of electrode layers of an unsintered stacked body during sintering and in which both components do not easily form a liquid phase, and a production method of such a stacked ceramic body. A print portion13is formed on a green sheet1, 12containing lead by use of an electrode paste consisting of copper oxide as its main component. A desired number of print sheets10are stacked to give an unsintered stacked body15. Degreasing is conducted in an atmosphere to degrease organic components. The print portion13is subjected to reducing treatment in a reducing atmosphere containing hydrogen and is converted to a print portion13containing copper as its main component. The unsintered stacked body15is sintered in a reducing atmosphere. Dielectric layers containing lead and electrode layers for applying a voltage to the dielectric layers are alternately stacked, and an oxidation portion containing copper is formed in the proximity of a surface of the electrode layer. A thickness of the oxidation portion in a stacking direction is 0.5 to 2 μm and a copper content in the oxidation portion is 1 to 30 wt %.

REFERENCES:
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patent: 5512353 (1996-04-01), Yokotani et al.
patent: 5672220 (1997-09-01), Omori et al.
patent: 2002/0079622 (2002-06-01), Randall et al.
patent: 2002/0098333 (2002-07-01), Feltz et al.
patent: 43 17 719 (1993-12-01), None
patent: 10 062 672 (2001-08-01), None
patent: A-5-82387 (1993-04-01), None

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