US4476214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical information disk comprising tellurium, selenium and antimony
Assignee: US Philips Corp
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Filing: 1981-10-13
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Granted: 1984-10-09
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Expires: 2001-10-13
Abstract
Abstract An optical information disk in which information can be written and read optically and which has a substrate plate which on at least one side has a recording layer which satisfies the formula Te x Se y Sb z S q wherein x=55-85 at. %, y=13-30 at. % z=1-12 at. %, q=0-10 at. % and x+y+z+q=100. Suitable recording layers are Te 60 Se 25 Sb 10 S 5 and Te 75 Se 15 Sb 5 S 5 .
Inventors
- 👤 Pieter Zalm
- 👤 Bernardus A. J. Jacobs
- 👤 Adriaan W. De Poorter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:23
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B7/2433; G11B2007/24302; G11B2007/24312; G11B2007/24314; G11B2007/24316; G11B2007/24318; G11B2007/24324; Y; Y10; Y10S; Y10S430/00; Y10S430/165
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
An optical information disk in which information can be recorded and read optically and which comprises a substrate plate which, on at least one side, has an ablative recording layer comprising the elements tellurium, selenium and antimony, characterized in that the composition of the recording layer satisfies the formula Te x Se y Sb z S q wherein x=55-85 at.%, y=13-30 at.%, z=1-12 at.% q=0-10 at.% and x+y+z+q=100.
Claim 2
Dependent Claim
68 words
An optical information disk in which information can be recorded and read optically and which comprises a substrate plate which, on at least one side, has an ablative recording layer comprising the elements tellurium, selenium and antimony, characterized in that the composition of the recording layer satisfies the formula Te x Se y Sb z S q wherein x=55-85 at.%, y=13-30 at.%, z=1-12 at.% q=0-10 at.% and x+y+z+q=100.
Claim 3
Dependent Claim
38 words
An optical information disk as claimed in claim 1, characterized in that furthermore the condition is satisfied that y=a·x+1.5z-q wherein x, y, z and q have the meanings stated in claim 1 and a has the value 0.15-0.30.
Claim 4
Dependent Claim
26 words
An information disk as claimed in claim 1, characterized in that the recording layer has the composition Te 60 Se 25 Sb 10 S 5 .
Claim 5
Dependent Claim
24 words
An information disk as claimed in claim 1, characterized in that the recording layer has the composition Te 75 Se 15 Sb 10 .
Claim 6
Dependent Claim
26 words
An information disk as claimed in claim 1, characterized in that the recording layer has the composition Te 75 Se 15 Sb 5 S 5 .
References Cited (Backward Citations)
US3990084A
Cited
US4290075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |