Single-turn perpendicular thin film heads

This paper describes the thin film heads, intended for use with CoCr perpendicular recording media, which were designed to bring forth highest possible efficiency both in ring-type and pole-type constructions. The heads are of single-turn structure to minimize the yoke length, and all the magnetic films are deposited on substantially the flat planes to avoid magnetic degradations. By employing such scheme, both ring-type and pole-type thin film heads are shown to have efficiency comparable to that of VHS-type ferrite video heads.