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US4769307A
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Optical recording member
Assignee: Mitsubishi Chemical Corp
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Filing: 1986-08-12
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Granted: 1988-09-06
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Expires: 2006-08-12
Abstract
Abstract PCT No. PCT/JP86/00412 Sec. 371 Date Feb. 25, 1987 Sec. 102(e) Date Feb. 25, 1987 PCT Filed Aug. 12, 1986 PCT Pub. No. WO87/01076 PCT Pub. Date Feb. 26, 1987.An optical recording member for performing recording and reproduction of information by causing changes in the state thereof with a laser beam, which optical recording member comprises a base plate and a recording layer provided on the base plate and containing therein a phthalocyanine type compound and/or naphthalocyanine type compound represented by the following general formula: <IMAGE> [I] (where: R1 to R4 represent substituted and/or unsubstituted alkyl group, alkoxyalkyl group, aryl group, and so forth; and A denotes Pb, Sn, Cu, Ni, VO, and so on).
Inventors
- 👤 Tetsuo Ozawa
- 👤 Shuichi Maeda
- 👤 Yutaka Kurose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:00
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/248; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
173 words
An optical recording member, comprising: a recording layer containing a light absorbing substance supported on a substrate, said optical recording layer recording information by being thermally deformed upon impact of a laser beam on portions of the recording layer and reproducing information by permitting the reading of a difference in reflections between the non-deformed portions and the deformed portions of said recording layer, the light recording substance of said recording layer being a metal complex of the formula: ##STR7## wherein R 1 , R 2 , R 3 and R 4 each represent --C 2 H 4 O-- n Y, wherein Y represents hydrogen, aryl or alkyl, each of which may be substituted, n is an integer of from 1 to 4 and A is a metal of the group I-B series, the group II-A series, the group II-B series, the group III-A series, the group III-B series, the group IV-A series, the group IV-B series, the group V-B series and of group VIII of the Periodic Table, or compounds containing said metals.
Claim 2
Dependent Claim
173 words
An optical recording member, comprising: a recording layer containing a light absorbing substance supported on a substrate, said optical recording layer recording information by being thermally deformed upon impact of a laser beam on portions of the recording layer and reproducing information by permitting the reading of a difference in reflections between the non-deformed portions and the deformed portions of said recording layer, the light recording substance of said recording layer being a metal complex of the formula: ##STR7## wherein R 1 , R 2 , R 3 and R 4 each represent --C 2 H 4 O-- n Y, wherein Y represents hydrogen, aryl or alkyl, each of which may be substituted, n is an integer of from 1 to 4 and A is a metal of the group I-B series, the group II-A series, the group II-B series, the group III-A series, the group III-B series, the group IV-A series, the group IV-B series, the group V-B series and of group VIII of the Periodic Table, or compounds containing said metals.
Claim 3
Dependent Claim
36 words
The optical recording member according to claim 1, wherein A is Sn, SnL 2 , Ge, GeL 2 , Pb, Fe, Ni, Co, VO, InL, TiO, Si, Cu, Mg, Zn, or AlL, wherein L is halogen.
Claim 4
Dependent Claim
15 words
The optical recording member accordng to claim 2, wherein A is VO, Ni, or Cu.
Claim 5
Dependent Claim
23 words
The optical recording member according to claim 1, wherein R 1 , R 2 , R 3 and R 4 are (lower)alkoxy(lower)alkyl groups.
Claim 6
Dependent Claim
16 words
The optical recording member according to claim 4, wherein said (lower)alkoxy(lower)alkyl group is methoxyethyl or butoxyethyl.
Claim 7
Dependent Claim
13 words
The optical recording member according to claim 1, wherein substituent Y is phenyl.
Claim 8
Dependent Claim
30 words
The optical recording member according to claim 1, wherein said substituent Y is C 1-25 alkyl or a C 1-25 alkyl group substituted by hydroxyl, carboxyl or carboxylic acid ester.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |