Title:
EDGE FINISHING PROCESS FOR GLASS OR CERAMIC DISKS USED IN DISK DRIVE DATA STORAGE DEVICES
Document Type and Number:
WIPO Patent Application WO2003024664
Kind Code:
A3
Abstract:
The circumferential edges of glass or ceramic disks used in disk drive data storage devices are preferably finished by ductile grinding to produce an essentially fracture-free surface, which is not chemically strengthened. Preferably, the material is glass, and both the inner and outer edges of the disk are finished. Edge finishing is preferably achieved in a two- stage process, involving a coarse grind and a ductile grind, using air bearing spindles rotated at high speed for grinding wheels and workpiece. Preferably, the grinding wheels are shaped to provide a radius at the juncture of the circumferential edges and flat disk surfaces.
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Inventors:
HAGAN JAMES
KRUGER BRUCE PETER
PAURUS DAVID
PRIEBE THOMAS
KRUGER BRUCE PETER
PAURUS DAVID
PRIEBE THOMAS
Application Number:
PCT/GB2002/004160
Publication Date:
May 30, 2003
Filing Date:
September 11, 2002
Export Citation:
Assignee:
IBM (US)
IBM UK (GB)
IBM UK (GB)
International Classes:
B24B1/00; B24B9/06; B24B9/08; C03C19/00; G11B5/73; G11B5/84; (IPC1-7): B24B9/06; C03C19/00
Domestic Patent References:
| WO2000064631A1 | 2000-11-02 | |||
| WO2001010595A1 | 2001-02-15 |
Foreign References:
| EP1033351A1 | 2000-09-06 | |||
| US6045436A | 2000-04-04 | |||
| US6319100B1 | 2001-11-20 | |||
| GB2337712A | 1999-12-01 | |||
| EP0759339A1 | 1997-02-26 |
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