Dynamic magnetic information storage or retrieval – Record medium – In container
Patent
1996-12-26
2000-02-01
Letscher, George J.
Dynamic magnetic information storage or retrieval
Record medium
In container
360 7708, G11B 23033, G11B 5596
Patent
active
060210281
ABSTRACT:
A method of writing servo data onto a high density flexible magnetic disk (7) using a servo writer is disclosed. This method comprises the steps of providing surface rippling prevention means on both sides of the magnetic disk, respectively; rotating the flexible magnetic disk at a rotation speed of 2000 rpm or higher with a spindle motor (3); and writing the servo data onto the flexible magnetic disk with magnetic heads (4). The surface rippling prevention means include soft sheet members (8a, 8b) which are arranged in close proximity to both surfaces of the flexible disk (7) in order to prevent surface rippling of the flexible disk (7) from being caused, thereby improving the accuracy of writing servo data. A magnetic recording medium is provided with the flexible magnetic disk on which the servo data is written by the method, a jacket in which the magnetic disk is rotatably provided and the soft sheets members arranged on the both sides of said magnetic disk, respectively;
REFERENCES:
patent: 4901180 (1990-02-01), Oishi
patent: 5189574 (1993-02-01), Iwamura et al.
patent: 5708547 (1998-01-01), Oishi
Okano Yoshihiro
Tangi Yoshinori
Uwabo Tsuneo
Yoneyama Eiichi
Letscher George J.
Mattson Brian M.
Mitsumi Electric Co. Ltd.
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