Patent ID: 8106740

Claim:
A resistance thermometer, composed of a plurality of components, comprising: at least one substrate, which is composed essentially of a material, whose thermal coefficient of expansion is essentially greater than 10.5 ppm/K; at least one resistive element, which is arranged on said at least one substrate; and at least one electrically insulating, separating layer, which is arranged essentially between said at least one resistive element and said at least one substrate; wherein: said at least one substrate, said at least one resistive element and said at least one separating layer are embodied and matched to one another in such a manner, that a resulting effective thermal coefficient of expansion TCE eff of the resistance thermometer corresponds to a predeterminable value, wherein the effective thermal coefficient of expansion TCE eff of the resistance thermometer is approximately given essentially by the following formula: TCE eff = ∑ i = 1 N ⁢ TCE i * d i * E i * F i ∑ i = 1 N ⁢ d i * E i * F i , wherein N is the number of components of the resistance thermometer, the index i indexes the individual components, and TCE i , d i and E i are, respectively, thermal coefficient of expansion, thickness and elasticity of the individual components, and F i takes into consideration a geometric factor; and the effective thermal coefficient of expansion TCE eff is greater than or equal to the thermal coefficient of expansion of the bulk metal of said at least one resistive element.