Switch contact element and its preparation method
US10026565B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2014 |
| Grant date | Jul 17, 2018 |
| Priority date | — |
| Expiry date | Apr 3, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2201/032
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A switch contact element, having a layered structure comprising three layers: the bottom layer is silicone rubber, the middle layer is a continuous base metal sheet layer, and the upper layer is a discontinuous (stripe-shaped, raised-point-shaped or lattice-shaped) precious metal plated layer or a double-metal composite layer of a discontinuous base metal plated layer and a precious metal plated layer. The thickness of the bottom layer is greater than that of the middle layer, the thickness of the middle layer is greater than that of the upper layer, and the thickness of the upper layer meets the conditions that the conductive current is greater than safe current of conductive contacts on a circuit board, and the service life of a switch for the design is ensured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.