Electrical resistors – Resistance value responsive to a condition – Current and/or voltage
Reexamination Certificate
2007-08-07
2009-06-16
Lee, Kyung (Department: 2832)
Electrical resistors
Resistance value responsive to a condition
Current and/or voltage
C338S0220SD, C252S518100
Reexamination Certificate
active
07548149
ABSTRACT:
A surface-mount negative-characteristic thermistor includes a ceramic body composed of a semiconductor ceramic material including at least one of Mn, Ni, and Ti; external electrodes disposed on surfaces of the ceramic body; and plating films disposed on surfaces of the external electrodes. When the molar quantity of Mn in the semiconductor ceramic material is represented by a and when the molar quantity of Ni in the semiconductor ceramic material is represented by b, the molar ratio of Mn to Ni is in the range of 55/45≦a/b≦90/10, and when the total molar quantity of Mn and Ni in the semiconductor ceramic material is defined as 100 parts by mole, the content of Ti is in the range of about 0.5 parts by mole to about 25 parts by mole.
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Official communication issued in counterpart Japanese Application No. 2007-502596, mailed on Feb. 5, 2008.
Official communication issued in the counterpart Japanese Application No. 2007-502596, mailed on Sep. 18, 2007.
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Miura Tadamasa
Nawai Shinichiro
Keating & Bennett LLP
Lee Kyung
Murata Manufacturing Co. Ltd.
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