Patent US4992316A successfully refreshed from Google Patents.
US4992316A
Expired / Lapsed
US
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Recording medium and method of producing the same
Assignee: Panasonic Holdings Corp
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Filing: 1989-10-20
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Granted: 1991-02-12
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Expires: 2009-10-20
Abstract
Abstract A recording medium which comprises a base body, a recording layer formed on the base body, and a protection layer formed on the recording layer for protecting the recording layer. The protection layer is made from silane surface active agent and the agent is polymerized and bonded to the recording layer. The recording medium provides high density recording performance.
Inventors
- 👤 Kazufumi Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:26
CPC Classifications
B; B82; B82Y; B82Y30/00; G; G11; G11B; G11B5/00; G11B5/62; G11B5/72; B05; B05D; B05D1/00; B05D1/18; B05D1/185; B82Y10/00; B82Y40/00; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
92 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer for protecting said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR3## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer.
Claim 2
Dependent Claim
92 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer for protecting said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR3## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer.
Claim 3
Dependent Claim
29 words
The recording medium of claim 1, wherein a chemical substance of CH 2 ═CH--(CH 2 ) n --SiCl 2 (n: integer) is used as said silane surface active agent.
Claim 4
Dependent Claim
24 words
The recording medium of claim 2, wherein vinyl groups of said silane surface active agent are bridged to one another by energy beam-irradiation thereto.
Claim 5
Dependent Claim
21 words
The recording medium of claim 1, wherein said recording and protection layers are formed on both surfaces of said base body.
Claim 6
Dependent Claim
13 words
The recording medium of claim 1, wherein said base body is optically transparent.
Claim 7
Dependent Claim
21 words
The recording medium of claim 1, wherein said recording medium is a magnetic recording medium, optical recording medium or recording disc.
Claim 8
Dependent Claim
14 words
The recording medium of claim 1, wherein said protection layer is a multi-monomolecular layer.
Claim 9
Dependent Claim
20 words
The recording medium of claim 7, wherein a monomolecular layer positioned at a surface of said multi-monomolecular layer is polymerized.
Claim 10
Dependent Claim
20 words
The recording medium of claim 7, wherein a monomolecular layer positioned at a surface of said multi-monomolecular layer contains fluorine.
Claim 11
Dependent Claim
97 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer, said protection layer being at least one monomolecular layer of a polymerized chemical substance of CH 2 ═CH--(CH 2 ) n --SiCl 3 (n: integer) which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR4## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer.
Claim 12
Dependent Claim
97 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer, said protection layer being at least one monomolecular layer of a polymerized chemical substance of CH 2 ═CH--(CH 2 ) n --SiCl 3 (n: integer) which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR4## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer.
Claim 13
Dependent Claim
14 words
The recording medium of claim 10, wherein said protection layer is a multi-monomolecular layer.
Claim 14
Dependent Claim
20 words
The recording medium of claim 11, wherein a monomolecular layer positioned at a surface of said multi-monomolecular layer is polymerized.
Claim 15
Dependent Claim
20 words
The recording medium of claim 11, wherein a monomolecular layer positioned at a surface of said multi-monomolecular layer contains fluorine.
Claim 16
Independent Claim
91 words
A method of producing a recording medium comprising the steps of: forming a recording layer on a base body for said recording medium; and forming a protection layer on said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR5## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer.
Claim 17
Independent Claim
91 words
A method of producing a recording medium comprising the steps of: forming a recording layer on a base body for said recording medium; and forming a protection layer on said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR5## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer.
Claim 18
Dependent Claim
39 words
The method of claim 14, wherein a chemical substance of CH 2 ═CH--(CH 2 ) n --SiCl 3 (n: integer) is used as said silane surface active agent and vinyl groups of said agent are bridged to one another.
Claim 19
Dependent Claim
13 words
The method of claim 14, wherein said protection layer is a multi-monomolecular layer.
Claim 20
Dependent Claim
19 words
The method of claim 16, wherein a monomolecular layer positioned at a surface of said multi-monomolecular layer is polymerized.
Claim 21
Dependent Claim
19 words
The method of claim 16, wherein a monomolecular layer positioned at a surface of said multi-monomolecular layer contains fluorine.
Claim 22
Dependent Claim
83 words
A recording medium comprising: a base body; at least one recording layer containing oxide at a surface of said recording layer, formed on said base body; and at least one protection layer containing bonding atoms which are oriented in a plane of the protection layer extending parallel to said base body, formed on said recording layer, said protection layer being a monomolecular film, wherein oxygen atoms at a surface of said oxide are chemically bonded to said bonding atoms of said protection layer.
Claim 23
Dependent Claim
83 words
A recording medium comprising: a base body; at least one recording layer containing oxide at a surface of said recording layer, formed on said base body; and at least one protection layer containing bonding atoms which are oriented in a plane of the protection layer extending parallel to said base body, formed on said recording layer, said protection layer being a monomolecular film, wherein oxygen atoms at a surface of said oxide are chemically bonded to said bonding atoms of said protection layer.
Claim 24
Dependent Claim
21 words
The recording medium of claim 19, wherein fluorine atoms or hydroxy groups are formed on a surface of said protection layer.
Claim 25
Dependent Claim
14 words
The recording medium of claim 19, wherein said protection layer is a multi-monomolecular layer.
Claim 26
Dependent Claim
20 words
The recording medium of claim 21, wherein a monomolecular layer positioned at a surface of said multi-monomolecular layer is polymerized.
Claim 27
Dependent Claim
20 words
The recording medium of claim 21, wherein a monomolecular layer positioned at a surface of said multi-monomolecular layer contains fluorine.
Claim 28
Dependent Claim
20 words
The recording medium of claim 22, wherein a monomolecular layer positioned at a surface of said multi-monomolecular layer contains fluorine.
Claim 29
Dependent Claim
123 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer for protecting said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent of CH 2 ═CH--(CH 2 ) n --SiCl 3 (n: integer) which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR6## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer, and wherein fluorine is added to vinyl groups of said silane surface active agent by processing in plasma including fluorine.
Claim 30
Dependent Claim
123 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer for protecting said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent of CH 2 ═CH--(CH 2 ) n --SiCl 3 (n: integer) which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR6## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer, and wherein fluorine is added to vinyl groups of said silane surface active agent by processing in plasma including fluorine.
Claim 31
Independent Claim
107 words
A method of producing a recording medium comprising the steps of: forming a recording layer on a base body for said recording medium; and forming a protection layer on said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR7## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer, and wherein said silane surface active agent is processed in a plasma atmosphere including fluorine gas.
Claim 32
Independent Claim
107 words
A method of producing a recording medium comprising the steps of: forming a recording layer on a base body for said recording medium; and forming a protection layer on said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR7## which are oriented along a plane in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said recording layer, and wherein said silane surface active agent is processed in a plasma atmosphere including fluorine gas.
Claim 33
Independent Claim
95 words
A method of producing a recording medium comprising the steps of: forming a recording layer containing oxide at a surface of said recording layer on a base body for said recording medium; and forming a protection layer on said oxide, said protection layer being at least one monomolecular layer of polymerized silane surface active agent which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR8## which are oriented in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said oxide.
Claim 34
Independent Claim
95 words
A method of producing a recording medium comprising the steps of: forming a recording layer containing oxide at a surface of said recording layer on a base body for said recording medium; and forming a protection layer on said oxide, said protection layer being at least one monomolecular layer of polymerized silane surface active agent which is made by a chemical adsorption technique, is polymerized through siloxane bonds of the formula ##STR8## which are oriented in a plane of the protection layer extending parallel to said base body, and is chemically bonded to said oxide.
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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) | 1994-02-11 | 1994-08-13 | 1995-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-11 | 1998-08-13 | 1999-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-11 | 2002-08-13 | 2003-02-12 | $7700.00 | Window Closed / Lapsed |