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US 4,441,094 AGranted
Solderable largely base metal electrodes for metal oxide varistors
AssigneeGeneral Electric Company
InventorLionel M. Levinson
Life of this patent
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Abstract
Solderable, largely based metal electrodes for metal oxide varistors are fabricated by screen printing an electrically conductive, air-fireable base metal composition on a varistor material substrate. A distributed fine noble metal array is screen printed over the screened base metal and the varistor heated in air at a temperature of between approximately 500.degree. C. and 800.degree. C. The varistor leads are easily solderable to the noble metal array.
Claims5
A metal oxide varistor having electrodes attached to at least one major surface thereof, comprising:
- at least one base metal electrode bonded to said metal oxide varistor and forming therewith an electrically conductive contact;
- and
- a distributed noble metal pattern disposed on said base metal electrode and forming an electrically conductive contact with said base metal electrode, said noble metal pattern covering a selected fraction of said base metal electrode whereby is formed a multi-layered low resistivity contact.
Dependencies are inferred from the claim text.