Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1994-09-07
1996-01-23
Wolff, John H.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9904, 360 9807, G11B 1702
Patent
active
054869609
ABSTRACT:
A disk storage device includes a fixed information storage disk that is free from deformation, has a wide effective data storage area and shows excellent anti-mechanical shock properties. Specifically, a disk hole of the information storage disk is fit to a hub coupled to a rotary shaft of a spindle motor until the disk contacts with a flange face of the hub. The spindle motor and the disk are then sandwiched by a lower electrode which contacts with the bottom surface of the spindle motor and an upper electrode which contacts with the upper surface of the disk. A DC power supply applies positive potential to the hub via the lower electrode and the casing of the spindle motor and negative potential to the disk via the upper electrode. An electrostatic junction portion is formed between the bottom face of the disk and the flange face of the hub, thereby securing the disk tightly to the hub.
REFERENCES:
patent: 4802158 (1989-01-01), Ogusu
patent: 5050158 (1991-09-01), Kitada et al.
patent: 5115366 (1992-05-01), Oishi
patent: 5301183 (1994-04-01), Minoda et al.
patent: 5323076 (1994-06-01), Hajec
Fuji Electric & Co., Ltd.
Wolff John H.
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