Control of Domain Configurations in Thin Film Heads by Ion Implantation
Original Publication Date: 1992-Feb-01
Included in the Prior Art Database: 2005-Mar-21
The domain configuration in the yoke of high performance thin film magnetic recording heads can be metastable. The effect of this magnetic instability is to cause noise in the channel which can lead to unacceptable error rates. The origin of the problem is thought to be complex stress patterns produced in the yoke during processing. In contrast to the ideal stress pattern, i.e. one that always forces the magnetization to lie along the track width, processing conditions generate stresses that allow magnetization in the domains to lie along other directions. Variability in process conditions can generate not one, but many different stress patterns.