Head Wear Sensors
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
Thin metallic films of a nickel-iron material can be used to measure wear rates and temperature of a magnetic head, for instance, at the wearing interface. Vacuum deposition and photolithographic techniques can be used to fabricate and pattern these sensors and their associated leads. The small dimensions of the films permit making wear samples with the sensor sandwiched between two pieces of the actual test material. Calibration curves of subsurface depth versus resistance and of temperature versus resistance are readily established.