CROSSFEED RESPONSE OF DMR VS. SAL MULTI-TRACK HEADS

A new concept of Dual Magnetoresistive reproductive mode is applied to improve the design and operation of high-performance multi-track Read -While-Write.(RWW) heads for tape and/or potential disk applications. RWW operation exists in some magnetic recording units in which verifyi ng what was recorded is necessary. A new multi-track Inductive/Dual Ma gnetoresistive (DMR) head design is found to reduce the crossfeed nois e radiation by about a factor of 20, compared with the conventional So ft-Adjacent-Layer (SAL) Magnetoresistive Heads design, which is the mo st favoured approach for achieving simultaneous read and write operati ons, especially in a multi-track head with ultra-narrow trackwidth. To verify these analysis results, measurements with 2.9 mu m track width inductive/MR and inductive/DMR heads were done.