Combined thin-film heads for digital compact cassettes

Author

Komoda, K. ; Kira, T. ; Minakata, R. ; Nakai, K. ; Nakamura, T. ; Deguchi, H.

Author_Institution

Sharp Corp., Nara, Japan

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

3826

Lastpage

3828

Abstract

A combined thin-film head has been developed for digital-compact-cassette (DCC) recording. In this head, the inductive recording head is placed behind the yoke-type magnetoresistive (MR) playback head. This design greatly simplifies fabrication by reducing the number of layers. Therefore, its structural stability and productivity are superior to those of other head designs. Its recording current is similar to that of a conventional thin-film recording head. The maximum output-level current is 120-160 mA_0-p, and the average output at 48 kHz exceeds 100 μV_p-p. The overwrite characteristics of 48 kHz on 9.6 kHz are about -19 dB. The influence of the recording field on the playback characteristics of the yoke-type MR head is negligible. This head has the characteristics required for DCC recording and playback

Keywords

digital audio tape; magnetic heads; magnetic recording; magnetic thin film devices; magnetoresistive devices; 100 muV; 120 to 160 mA; 48 kHz; 9.6 kHz; DCC recording; MR head; Mn_1-xZn_xFe₂O₄; MnZn ferrite; NiFe film; digital compact cassette recording; head designs; inductive recording head; output-level current; overwrite characteristics; playback characteristics; recording current; structural stability; thin-film head; yoke type magnetoresistive playback head; CD recording; Coils; Conductive films; Ferrite films; Magnetic heads; Magnetic recording; Magnetic separation; Magnetoresistance; Substrates; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281312

Filename

281312