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Title:
MANUFACTURE OF LAMINATED CERAMIC CAPACITOR
Document Type and Number:
Japanese Patent JP2000216042
Kind Code:
A
Abstract:

To prevent a crack from being generated in a laminated ceramic capacitor at the time of a firing of the capacitor by a method wherein at least a specified temperature range of the heat-up part in the firing of the capacitor is heated up at a specified speed.

A laminated ceramic capacitor 1 has internal electrodes 21 and 25 and dielectric layers 3, which are alternately laminated, and one pair of external electrodes 51 and 55 being connected with the electrodes 21 and 25. The electrodes 21 and 25 of this capacitor 1 are formed of an Ni layer or an Ni alloy layer. Here, the temperature range of at least 700°C or higher to 1100°C or lower of the heat-up part in a firing of the capacitor is heated up at a speed higher than 500°C/hour, preferably higher than about 600°C/hour and more preferably higher than about 800°C/hour and it is preferable that the oxygen partial pressure in an atmosphere of a temperature higher than 1100°C in the firing is one lower than 10-8 atm. Moreover, in the case where the firing of the capacitor 1 is continuously performed, the oxygen partial pressure in the atmosphere in a temperature range of one part lower than 1100°C of the cooling-down part in the firing of the capacitor is set at an oxygen partial pressure higher than 10-8 atm.


Inventors:
NOMURA TAKESHI
Application Number:
JP1795699A
Publication Date:
August 04, 2000
Filing Date:
January 27, 1999
Export Citation:
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Assignee:
TDK CORP
International Classes:
H01G4/12; (IPC1-7): H01G4/12; H01G4/12
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)