Patent ID: 6552554
Filing Date: 2003-04-22
Classification: G11C,Y10S

Abstract:
A method for determining a property of current perpendicular to the plane of a device including a substrate, a conductive base layer on the substrate and a magnetic multilayer containing a magnetic material on the conductive base layer comprising the steps of:forming at least one hole in the magnetic multilayer of the device and a trench around each said hole to isolate at least one first continuous portion of the magnetic multilayer around the at least one hole from a second portion of the magnetic multilayer wherein the diameter of the trench, hole and testing ring, taken together, is less than 10 micrometer; and determining the property of the device by electrically contacting a probe with the at least one first continuous portion of the magnetic multilayer, applying a predetermined current or voltage to the probe, and measuring a property of the device.