SP4 measuring heads have four in-line probe tips mounted on independent springs. They make it possible to electrically characterize the resistance, the sheet resistance and the resistivity (thickness). Different models are available depending on the type of layer to be measured and the electrical properties.
Specifications: • Different spacing between the tips: depends on the size of the sample (Edge effect) • Choice of pressure applied: depending on the hardness of the material • Two materials available: tungsten or osmium depending on electron affinities • Several tip radius: depends of the thickness • Wide choice of electrical connection: adapted to the measuring instrument • High temperature model
