Electrical devices containing conductive polymers
US6593843B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2000 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Jun 28, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C1/1406
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical device in which an element composed of a conductive polymer composition is positioned in contact with the first surface of a metal electrode, the first surface having a center line average roughness Ra and a reflection density RD, the product Ra times RD being 0.5 to 1.6 &mgr;m. The conductive polymer composition preferably exhibits PTC behavior. In a second embodiment an electrical device has an element composed of a conductive polymer composition in contact with the first surface of a metal electrode produced by providing a base metal foil having an Ra of at most 0.45 &mgr;m and depositing material onto the base metal foil to form a first surface having a product of Ra times RD of at least 0.14 &mgr;m. Other embodiments include electrical devices with metal electrodes made by pulse plating processes, and metal electrodes made by electrodeposition under diffusion-limited conditions. The electrical devices may be circuit protection devices and have improved electrical and physical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.