Patent ID: 8115503

Claim:
A device for measuring the resistivity ρ c of an interface between a semiconductor and a metal, comprising at least: one dielectric layer, at least three semiconductor-based elements of a substantially rectangular shape, which are arranged on the dielectric layer, having a lengthwise L and widthwise W face in contact with the dielectric layer and having a thickness t, at least six interface portions containing the metal or an alloy of said semiconductor and said metal, wherein each of two opposing faces of the semiconductor-based elements, having a surface equal to t×W and being perpendicular to the face in contact with the dielectric layer, being completely covered by one of the interface portions, means for applying voltage U between two interface portions covering two opposing faces of a single semiconductor-based element, means for measuring a current I flowing through the semiconductor-based elements and through the interface portions, means for calculating resistance R=U/I for each of the semiconductor-based elements and interface portions, means for calculating a linear regression of the function R=f(W), such that R=a.W +b, with a and b being real numbers, from calculations of R and the widths W of the various semiconductor-based elements, means for calculating W actual = W - b a for each value of W, means for calculating a linear regression of the function R=f(L), such that R=c.L +d, with c and d being real numbers, from calculations of R and the lengths L of the various semiconductor-based elements, and means for calculating ρ c =2R c ×W actual ×t, with 2R c =d, wherein R c is contact resistance.