| 摘要 |
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 R<SUB>a </SUB>and a reflection density RD, the product R<SUB>a </SUB>times RD being 0.5 to 1.6 mum. 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 R<SUB>a </SUB>of at most 0.45 mum 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 mum. 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.
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