Patent ID: 7265653
Filing Date: 2007-09-04
Classification: H01H,Y10T

Abstract:
1. A method of providing a protective component comprising a fusible element having terminals, and a heating element, which are applied in the form of layer components to the surface of a substrate, said fusible element being configured so that a current flow between its terminals is interrupted if the fusible element is heated, at least in a melting region, for a predetermined period of time above a predetermined temperature, said fusible element and said heating element being so arranged on the substrate that heat produced by said heating element is transported to said fusible element, and a current flow through said fusible element is interrupted when the current flow through said heating element exceeds a threshold value for a predetermined period of time, wherein, in order to produce connections to said heating element and said fusible element, a conductive layer is so applied to the substrate and structured that said heating element and said fusible element are connected in series, said heating element being arranged at a predetermined spacing beside said fusible element, and wherein, at least one predetermined location at said heating element and/or between said heating element and said fusible element, a predetermined local thermal capacity storing a portion of the heat propagating from said heating element to said fusible element is adjusted by adjusting at least one of: whereby, at least approximately, a defined time behaviour of the thermal transfer from said heating element to said fusible element is provided; wherein said predetermined local thermal capacity at the location of said heating element is adjusted, with a predetermined dimensioning of said heating element, by applying said additional thermal storage layer above or below the layer of said heating element; and wherein said additional thermal storage layer is electrically conductive and an electrical insulator layer is applied between said thermal storage layer and the layer of said heating element.