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US 6,639,892 B2Granted
Optical data recording medium excellent in recording sensitivity and recording property
AssigneeFuji Photo Film Co., Ltd.
InventorYoshihisa Usami
Life of this patent
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Abstract
The present invention provides an optical data recording medium excellent in recording sensitivity and recording property (jitter). On a transparent substrate, in which a pre-groove having a depth of 20 to 100 nm is formed, a dye recording layer is formed to have a thickness at a groove portion of 50 to 160 nm and a thickness at a land portion of at least 80% of the thickness at the groove portion.
Claims20
An optical data recording medium comprising:
- a transparent substrate at which a pre-groove having a depth of from 20 to 100 nm is formed;
- and
- a dye recording layer formed thereon, which has a groove portion whose thickness is from 50 to 160 nm, has a land portion whose thickness is at least 80% of the thickness at the groove portion, and includes organic dye which enables recording of data.
An optical data recording medium produced by a process comprising the steps of:
- applying an application solution which contains organic dye to a surface of a transparent substrate at which a pre-groove having a depth of from 20 to 100 nm is formed, for forming a coating film;
- and
- drying the coating film that is formed, to form a dye recording layer that has a thickness at a groove portion of from 50 to 160 nm and a thickness at a land portion of at least 80% of the thickness at the groove portion.
Dependencies are inferred from the claim text.