METHOD FOR MANUFACTURING NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR AND NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR

Title:

METHOD FOR MANUFACTURING NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR AND NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR

Document Type and Number:

WIPO Patent Application WO/2004/008466

Kind Code:

A1

Abstract:

A method for manufacturing a negative temperature coefficient thermistor, which uses a semiconductor ceramic made of a spinel composite oxide that essentially comprises Mn and contains Al. An Al₂O₃ powder having an average primary particle diameter of 0.05 to 0.3 μm and a specific surface area of 10 to 80 m²/g are used as a starting material. The negative temperature coefficient thermistor is able to be sintered at a low temperature, is small in variation of the initial properties, and hardly deteriorates in characteristics with time.

Inventors:

MIURA TADAMASA (JP)

Application Number:

PCT/JP2003/008261

Publication Date:

January 22, 2004

Filing Date:

June 30, 2003

Export Citation:

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Assignee:

MURATA MANUFACTURING CO (JP)
MIURA TADAMASA (JP)

International Classes:

H01C7/04; H01C17/065; (IPC1-7): H01C7/04

Foreign References:

JPH03279252A	1991-12-10
JPH0294404A	1990-04-05
JP2001267045A	2001-09-28
JP2001220218A	2001-08-14
JP2002080273A	2002-03-19

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