METHOD AND APPARATUS FOR COMPENSATING OPTICAL DISKS FOR EFFECTS OF THIN FILMS

Title:

METHOD AND APPARATUS FOR COMPENSATING OPTICAL DISKS FOR EFFECTS OF THIN FILMS

Document Type and Number:

WIPO Patent Application WO2002025649

Kind Code:

A3

Abstract:

An optical data storage/recording medium is provided with a thin film adjacent a data surface. Potential undesired effects of the presence or thickness of the thin film are adjusted for or compensated for to reduce or eliminate the undesired effects. In one aspect, the (uncoated) physical size of data layer features are adjusted so as to produce desired as-detected sizes, shapes or spacings, after a coating or thin film is present. In one aspect, length and/or width of raised features have an uncoated physical size less than the desired as-detected size. In one aspect, depressed features have uncoated physical dimensions greater than desired as-detected dimensions.

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Inventors:

BLANKENBECKLER DAVID L
MEDOWER BRIAN S

Application Number:

PCT/US2001/042250

Publication Date:

June 20, 2002

Filing Date:

September 19, 2001

Export Citation:

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Assignee:

DATAPLAY INC (US)

International Classes:

G11B7/013; G11B7/24; G11B7/26; (IPC1-7): G11B7/26; G11B7/24; G11B7/013

Domestic Patent References:

WO1999026240A1

1999-05-27

Foreign References:

EP0987699A1	2000-03-22
US5266136A	1993-11-30

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