ADVANCED MULTI-VIA HEADS

Advanced versions of thin film recording heads with multiple magnetic vias are reported on. In these designs the flux path makes more than o ne pass through a multi-level race track coll. The multiple flux paths multiply the number of effective turns in the head. With this patente d approach called the ''Diamond Architecture'' low inductance and resi stance is achieved with a large number of effective turns. Advanced de signs based on three layer coils, laminated yokes and four yoke turns are described. Frequency response data on the heads with laminated yok es show dear improvement over unlaminated heads.