| US 7,589,290 B2 | ||
| Electric contact | ||
| Peter Rehbein, Weissach (Germany); and Volker Haas, Tamm (Germany) | ||
| Assigned to Robert Bosch GmbH, Stuttgart (Germany) | ||
| Appl. No. 10/524,726 PCT Filed Oct. 02, 2003, PCT No. PCT/DE03/03296 § 371(c)(1), (2), (4) Date Feb. 16, 2005, PCT Pub. No. WO2004/032284, PCT Pub. Date Apr. 15, 2004. |
||
| Claims priority of application No. 102 46 062 (DE), filed on Oct. 02, 2002. | ||
| Prior Publication US 2006/0163047 A1, Jul. 27, 2006 | ||
| Int. Cl. H01H 1/02 (2006.01) | ||
| U.S. Cl. 200—262 [200/266; 200/268; 174/126.1; 428/614; 428/673; 428/332] | 6 Claims |
| 1. An electrical contact comprising:
a metallic substrate; and,
a contact layer in the form of a gradient layer applied on the metallic substrate, the gradient layer being composed of at
least two elements, the at least two elements including a first element and a second element, wherein one of: (a) the first
element is silver and forms an alloy with the second element, the second element including one of indium and tin, (b) the
first element is tin and the second element is phosphorus, and (c) the first element is indium and the second element is tin;
wherein a proportion of the first element and the second element in the gradient layer changes substantially linearly in a
direction normal to a plane of the substrate.
|