Patent · US Expired

Directly contactable disk for vertical magnetic data storage

US5923511A · kind A · utility

6Cited by

15References

18Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Upali Bandara · Leimen, DE
Arved Brunsch · Stuttgart, DE
Gerhard Elsner · Kaarst, DE

Key dates

Filing date	Jan 23, 1997
Grant date	Jul 13, 1999
Priority date	—
Expiry date	Jan 23, 2017

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/73915
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A disk is described for vertical magnetic data storage, which can be directly contacted by a read/write head, consists of a substrate made of silicon, the surface of which forms a layer of porous silicon. The layer of porous silicon preferably contains pores which run essentially perpendicular to the surface of the substrate and are at least partially filled with a magnetic material. To manufacture the disk, a substrate made preferably of monocrystalline silicon, is chemically treated to form the pores which are at least partially filled with a magnetic material. The magnetic material may be removed from the surface between the pores. The silicon surface may then be treated to improve the wear characteristics. With such a disk, the read/write head can come in direct contact with the treated silicon substrate surface without abrasion or damage.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.