| US 7,525,409 B2 | ||
| Method of manufacturing a varistor | ||
| Åke Öberg, Uppsala (Sweden); Peter Hidman, Smedjebacken (Sweden); Ragnar Österlund, Ludvika (Sweden); and Leif Pettersson, Västerås (Sweden) | ||
| Assigned to ABB Research Ltd., Zürich (Switzerland) | ||
| Appl. No. 11/793,607 PCT Filed Nov. 28, 2005, PCT No. PCT/SE2005/001784 § 371(c)(1), (2), (4) Date Jun. 20, 2007, PCT Pub. No. WO2006/068570, PCT Pub. Date Jun. 29, 2006. |
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| Claims priority of application No. 0403170 (SE), filed on Dec. 22, 2004. | ||
| Prior Publication US 2008/0129442 A1, Jun. 05, 2008 | ||
| Int. Cl. H01C 7/00 (2006.01) | ||
| U.S. Cl. 338—21 [338/20; 29/610.1; 252/518.1; 361/124] | 14 Claims |
| 1. A method of manufacturing a varistor, the method comprising:
manufacturing a varistor body with two end faces based on one or more metal oxides,
coating at least one end face of the varistor body with a layer of electrode material, wherein said electrode material contains
aluminum or an alloy thereof and coating is performed by means of an ion- or atom-transferring method, whereby conditions
during the coating are adapted such that the thickness of the layer is within the interval of from 5 micrometers to 30 micrometers.
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