Patent ID: 6313647
Filing Date: 2001-11-06
Classification: G01R,G11B

Abstract:
A method for determining the resistivity of a thin carbon overcoat, the thin carbon overcoat having a known depth, the method comprising steps of:mounting a substrate having a thin carbon overcoat on a substrate holding device;applying a thin layer of lubricant on the thin carbon overcoat;bringing an electronic probe into close proximity to the substrate, wherein the electronic probe includes a magnetic head having two electrically distinct surfaces having a known total contact area and the magnetic head provides large contact area without causing mechanical penetration of the thin carbon overcoat;obtaining an I-V curve; andcalculating the resistance and the resistivity of the thin carbon overcoat using the I-V curve, the known depth of the thin carbon overcoat and the known contact area of the electronic probe.