Direct access storage unit

Details Direct access storage unit Direct access storage unit

G - Physics

11

B

352/81, 352/33.3

G11B 9/00 (2006.01) G11B 9/08 (2006.01) G11B 17/34 (2006.01) G11B 19/20 (2006.01) G11B 21/00 (2006.01) G11B 25/04 (2006.01)

Patent

CA 1283733

A B S T R A C T Direct Access Storage Unit The storage unit comprises an array of tunnel tips (13) arranged at tunneling distance from a storage medium (2) which is capable of permitting digital information to be written or read through variations of the tunneling current. Each tunnel tip (13) is supported on its own cantilever beam (12) extending across a cavity (14) formed in a common substrate (15). Each cantilever beam (12) as well as the bottom of each cavity (14) are covered with an electrically conducting layer (16, 18) enabling the distance between each one of the tunnel tips (13) and the surface of the storage medium (2) to be electrostatically controlled. The storage medium (2) is attached to the free end of a piezoceramic bender, the end in operation performing a circular motion so that each tunnel tip (13) scans its associated area of the storage medium (2) along a circular track.

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