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US 4,060,661 AGranted
Voltage-dependent resistor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAkihiro Takami, Takayuki Kuroda, Katsuo Nagano, Michio Matsuoka
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAkihiro Takami, Takayuki Kuroda, Katsuo Nagano, Michio Matsuoka
Estimating the term…
There is provided a voltage-dependent resistor comprising a bulk consisting essentially of zinc oxide as the major part and as additives 0.01 to 10 mol % of Bi.sub.2 O.sub.3, CoO, MnO, TiO and NiO and electrodes on the bulk, said electrodes having been formed by baking a silver paste comprising silver powder and a glass frit on the bulk, said glass frit containing as its principal content 80 to 95% by weight of Bi.sub.2 O.sub.3 and correspondingly 20 to 5% by weight of SiO.sub.2, said glass frit also containing 1 to 5 parts by weight of B.sub.2 O.sub.3 for 100 parts of said principal content. The electrodes can also contain minor amounts of CoO, Sb.sub.2 O.sub.3, a mixture of Sb.sub.2 O.sub.3 with Ag.sub.2 O or MgO, or a mixture of CoO with MgO or Ag.sub.2 O.
A voltage-dependent resistor comprising a bulk consisting mainly of zinc oxide as a major part and, as additives, 0.01 to 10 mol % of Bi.sub.2 O.sub.3, CoO, MnO, TiO and NiO, respectively and electrodes on said bulk, said electrodes having been formed by baking a silver paste comprising silver powder and a glass frit on said bulk, said glass frit containing as its principal contents 80 to 95% by weight of Bi.sub.2 O.sub.3 and correspondingly 20 to 5% by weight of SiO.sub.2 said glass frit also containing 1 to 5 parts by weight of B.sub.2 O.sub.3 per 100 parts of said principal contents.
A method of making a voltage-dependent resistor comprising the steps of
Dependencies are inferred from the claim text.