Submicronwidth multitrack single pole head for ultra high density perpendicular magnetic recording

Abstract

Submicronwidth multitrack single pole heads are presented. The novel head consists of three layers of thin film conductors sandwiching two main poles. The fields due to the current source in the parallel thin film conductor structure has been analyzed mathematically. This configuration can yield a strong and steep field gradient. The write performance of this head was measured with double-layered media. The recorded trackwidth was confirmed to be about 0.5 /spl mu/m with magnetic force microscopy. There is no noticeable interference between the two tracks spaced nearly 1 /spl mu/m apart. A track density of 50 kTPI has been achieved.