Study on the Constriction Resistance of Electric Contact

概要

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Estimation of a constriction resistance of a contact with a complex surface layer has been difficult. This paper reports the result of a theoretical study on the constriction resistance for a general case where electrical conductivity varies with depth from the contact surface. This theory was applied to the diffused contact. From the relation between the concentration distribution and change of electrical conductivity with composition, the variation of the electrical conductivity in the diffusion layer was clarified and, in the surface layer near the contact surface, this variation was approximated by an exponential function. The constriction resistance between the surfaces with the electrical conductivity whose variation was represented by such a function was analyzed. The contact resistances of contacts made by the diffusion of 3 μm thick gold deposit into substrates were measured and were found to be fairly equal to the constriction resistance calculated.
社団法人応用物理学会の論文
1974-12-05