The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 06, 2001
Filed:
May. 24, 1999
Hironori Suzuki, Kanagawa-ken, JP;
Hideyasu Andoh, Tokyo, JP;
Yoshiyasu Itoh, Kanagawa-ken, JP;
Hiroyoshi Narita, Kanagawa-ken, JP;
Yoshikazu Tanno, Kanagawa-ken, JP;
Toshiya Imai, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A sintered body which can be formed into a resistor having a non-linear resistance includes zinc oxide is the principal composition and bismuth, cobalt, antimony, manganese and nickel respectively converted to expressed Bi,O,, Co,O,, Sb,O,, MnO and NiO as auxiliary compositions. The compositions contains 0.05 to 10 mol % of Bi,O,, 0.05 to 10 mol % of Co,O,, 0.05 to 10 mol % of Sb,O,, 0.05 to 10 mol % of MnO and 0.05 to 10 mol % of NiO; the content ratio of the Bi,O,to the NiO is in a mole ratio of 0.5 or more but 1.5 or less, and the content ratio of the MnO to the Sb,O,is in a mole ratio of 1.0 or less. Preferably, the composition contains at least one of 0.5 to 500 ppm of aluminum, converted to Al,, and 10 to 1000 ppm of at least one or the other of boron and silver, converted respectively to B,, and Ag,. The composition may also contain 0.01 to 1000 ppm of at least one of sodium, potassium, chlorine and calcium, converted respectively to Na,, K,, Cl,and Ca,.