THIN-FILM HEADS FOR DIGITAL MULTICHANNEL RECORDER

The fabrication and performance of thin film magnetic heads newly deve loped for digital multi-channel recorder are described. The reproducin g head is a yoke type magnetoresistive head and the recording head is an inductive head. Four kinds of noise peculiar to the yoke type magne toresistive heads have been completely suppressed by strict control of process conditions. Two new processes for a coil and a core have been applied to the recording head. Two reproducing heads and one recordin g head are assembled in a tape guide block ensuring the accurate tape transport and the stable tape-to-head contact. The characteristics of both the reproducing head and the recording head have proved to be suf ficient for digital multi-channel recorder.