Evaporation type magnetic recording medium and magnetic...

Details Evaporation type magnetic recording medium and magnetic... Evaporation type magnetic recording medium and magnetic...

2007-11-20

2007-11-20

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

Reexamination Certificate

active

10928294

ABSTRACT:
A lower magnetic layer magnetized and formed in a first direction and an upper magnetic layer magnetized and formed in a second direction opposite to the lower magnetic layer are laminated on a base. A ratio T1/T2of a thickness T1of the upper magnetic layer to a thickness T2of the lower magnetic layer is located within a range of 0.6 to 0.9. Thus, in a herringbone type dual evaporated tape in which data is recorded and reproduced in a serpentine fashion, a vertical magnetization component is canceled to reduce the difference in the waveform distortion of a reproducing signal between a forward direction and a reverse direction.

REFERENCES:
patent: 5453886 (1995-09-01), Kobayashi et al.
patent: 2003/0224210 (2003-12-01), Harasawa et al.
patent: 3 178028 (1991-08-01), None
patent: 10 198940 (1998-07-01), None
patent: 11 328645 (1999-11-01), None

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