A LOW INDUCTANCE METAL-IN-GAP HEAD USING A SIDE-CORE CONCEPT

A low inductance metal-in-gap(MIG) head for rigid disk drives using it single crystal ferrite core was developed. Side mounting philosophy o f a core was adopted to reduce the thickness of the core, thus improvi ng the inductance, and to achieve the ease of controlling the narrow t rack width and small throat height. It was demonstrated that the ''sid e-core composite(SCC)'' head has several advantages over conventional monolithic and composite heads in terms of electrical performance and manufacturability. New type of testing methods named ''swept frequency '' and ''swept current'' were also developed to demonstrate different interpretations of magnetic recording phenomena.