Stiction Measurement Apparatus for Magnetic Head-Tape Interface Studies
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07
When two surfaces come in contact under load, the contact takes place at the tip of the asperities and the load is supported by the deformation of the contacting asperities. In order to move surfaces relative to each other, a force (known as frictional force) is required to shear the contacting asperities which depends on real area of contact and shear strength of the junctions. Magnetic tapes generally chemically degrade if stored at high humidity and high temperature for long periods (e.g., 125ŒF/60%RH for 6 months). Chemical degradation results in stick when tapes come in contact with a magnetic head. This results in excessive drag (or friction). During tape development, it is important to determine if excessive drag is due to conventional shearing of the asperities or stick.