US4985273A
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Method of producing fine inorganic particles
Assignee: Panasonic Holdings Corp
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Filing: 1989-06-05
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Granted: 1991-01-15
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Expires: 2009-06-05
Abstract
Abstract The present invention concerns a field of dealing with inorganic fine particles, and provides a mass of the inorganic fine particles and method of producing the mass, and as applications of the method, an ultrathin film of inorganic fine particles and method of producing the ultrathin film, a magnetic recording medium and method of manufacturing the medium, and a method of manufacturing an inorganic pattern and method of manufacturing a inorganic wiring. Furthermore, the present invention provides the magnetic recording medium by convering the inorganic fine particles with a monomolecular film of a silane type surface active agent through chemical adsorption and permitting the inorganic fine particles and the monomolecular film to have functions.
Inventors
- 👤 Norihisa Mino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:04
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/712; B; B82; B82Y; B82Y30/00; B82Y10/00; C; C09; C09C; C09C3/00; C09C3/12; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/60; C01P2004/61; C01P2004/64; C01P2006/00; C01P2006/42; C01P2006/90; H; H05; H05K; H05K3/00; H05K3/10; H05K3/102; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/31504; Y10T428/31536; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
96 words
A method of producing a mass of inorganic fine particles, which comprises the steps of reacting the inorganic fine particles on the entire surface thereof with a silane type surface active agent containing a straight hydrocarbon chain and a junctional group to form a monomolecular film on the entire surface of said inorganic fine particles, thereafter making the organic fine particles covered with the monomolecular film in a predetermined density on a substrate, and thereafter subjecting the monomolecular film to physical or chemical treatment to allow the functional groups to be chemically bonded to each other.
Claim 2
Independent Claim
96 words
A method of producing a mass of inorganic fine particles, which comprises the steps of reacting the inorganic fine particles on the entire surface thereof with a silane type surface active agent containing a straight hydrocarbon chain and a junctional group to form a monomolecular film on the entire surface of said inorganic fine particles, thereafter making the organic fine particles covered with the monomolecular film in a predetermined density on a substrate, and thereafter subjecting the monomolecular film to physical or chemical treatment to allow the functional groups to be chemically bonded to each other.
Claim 3
Dependent Claim
41 words
The method of producing the mass of inorganic fine particles according to claim 1, wherein a chemical adsorbing method is used in forming the monomolecular film of the silane type surface active agent on the surface of the inorganic fine particles.
Claim 4
Dependent Claim
57 words
The method of producing the mass of inorganic fine particles according to claim 1, wherein said silane surface active agent has a straight-chain hydrocarbyl group containing 10 or more CH 2 groups, polymerizing groups at one end thereof and a group of being adsorbed at the other end thereof on the surface of said inorganic fine particles.
Claim 5
Dependent Claim
41 words
The method of producing the mass of inorganic fine particles according to claim 1, wherein the group in said silane type surface active agent of being adsorbed on the surface of said inorganic fine particles is mono-, di- or tri-chlorosilane group.
Claim 6
Dependent Claim
23 words
The method of producing the mass of inorganic fine particles according to claim 1, wherein said polymerizing group is an unsaturated bonding group.
Claim 7
Dependent Claim
36 words
The method of producing the mass of inorganic fine particles according to claim 1, wherein said physical treatment is carried out with an energy beam such as ultraviolet rays, far ultraviolet rays, electron beam and X-rays.
Claim 8
Dependent Claim
27 words
The method of producing the mass of inorganic fine particles according to claim 1, wherein said chemical treatment is carried out in the presence of a catalyst.
Claim 9
Independent Claim
84 words
A method of producing an ultrathin film of inorganic fine particles, which comprises steps of forming a monomolecular film of a silane type surface active agent uniformly on the surface of inorganic fine particles, developing said inorganic fine particles on a gas-liquid interface, transferring said inorganic fine particles onto a substrate, and subjecting the inorganic fine particles transferred on the substrate to physical or chemical treatment, thereby allowing the groups in the silane type surface active agent to be chemically bonded to each other.
Claim 10
Independent Claim
84 words
A method of producing an ultrathin film of inorganic fine particles, which comprises steps of forming a monomolecular film of a silane type surface active agent uniformly on the surface of inorganic fine particles, developing said inorganic fine particles on a gas-liquid interface, transferring said inorganic fine particles onto a substrate, and subjecting the inorganic fine particles transferred on the substrate to physical or chemical treatment, thereby allowing the groups in the silane type surface active agent to be chemically bonded to each other.
Claim 11
Dependent Claim
34 words
The method of producing an ultrathin film of inorganic fine particles according to claim 8, wherein the step of transferring the inorganic fine particles onto the substrate is carried out with a Langmuir-Blodgett's method.
Claim 12
Dependent Claim
58 words
The method of producing an ultrathin film of inorganic fine particles according to claim 8, wherein said silane surface active agent has a straight-chain hydrocarbyl group containing 10 or more CH 2 groups, polymerizing groups at one end thereof and a group of being adsorbed at the other end thereof on the surface of said inorganic fine particles.
Claim 13
Dependent Claim
42 words
The method of producing an ultrathin film of inorganic fine particles according to claim 8, wherein the group in said silane type surface active agent of being adsorbed on the surface of said inorganic fine particles is mono-, di- or tri-chlorosilane group.
Claim 14
Dependent Claim
24 words
The method of producing an ultrathin film of inorganic fine particles according to claim 8, wherein said polymerizing group is an unsaturated bonding group.
Claim 15
Dependent Claim
37 words
The method of producing an ultrathin film of inorganic fine particles according to claim 8, wherein said physical treatment is carried out with an energy beam such as ultraviolet rays, far ultraviolet rays, electron beam and X-rays.
Claim 16
Dependent Claim
28 words
The method of producing an ultrathin film of inorganic fine particles according to claim 8, wherein said chemical treatment is carried out in the presence of a catalyst.
Claim 17
Independent Claim
90 words
A method of manufacturing a magnetic recording layer, which comprises the steps of forming a monomolecular film of a silane type surface active agent uniformly on the entire surface of magnetic inorganic fine particles, thereafter forming a film of said magnetic inorganic fine particles on a substrate for said magnetic recording layer, and thereafter subjecting said film of the magnetic inorganic fine particles formed on said substrate to physical or chemical treatment to allow the groups in said silane type surface active agent to be chemically boned to each other.
Claim 18
Independent Claim
90 words
A method of manufacturing a magnetic recording layer, which comprises the steps of forming a monomolecular film of a silane type surface active agent uniformly on the entire surface of magnetic inorganic fine particles, thereafter forming a film of said magnetic inorganic fine particles on a substrate for said magnetic recording layer, and thereafter subjecting said film of the magnetic inorganic fine particles formed on said substrate to physical or chemical treatment to allow the groups in said silane type surface active agent to be chemically boned to each other.
Claim 19
Dependent Claim
23 words
The method of manufacturing a magnetic recording medium according to claim 15, wherein said physical treatment is carried out in a magnetic field.
Claim 20
Dependent Claim
30 words
The method of manufacturing a magnetic recording medium according to claim 15, wherein said film of magnetic inorganic fine particles is formed by a spin coating technique on said substrate.
Claim 21
Dependent Claim
35 words
The method of manufacturing a magnetic recording medium according to claim 15, wherein the step of forming said film of the magnetic inorganic fine particles onto the substrate is carried out with a Langmuir-Blodgett's method.
Claim 22
Dependent Claim
32 words
The method of manufacturing a magnetic recording medium according to claim 18, wherein the step of forming said film of the magnetic inorganic fine particles is carried out in a magnetic field.
Claim 23
Dependent Claim
69 words
The method of manufacturing a magnetic recording medium according to claim 15, wherein a step of magnetizing the magnetic inorganic fine particles is inserted between the step of forming the monomolecular film of silane type surface active agent uniformly on the surface of said magnetic inorganic fine particles and the step of forming the film of said magnetic inorganic fine particles on the substrate for the magnetic recording medium.
Claim 24
Independent Claim
101 words
A method of manufacturing an inorganic pattern, which comprises the steps of reacting a silane type surface active agent containing a straight hydrocarbon chain and a functional group with the entire surface of inorganic fine particles to form a monomolecular film of the agent on said surface of inorganic fine particles, thereafter making the inorganic fine particles covered with the monomolecular film in a predetermined density on a substrate, and thereafter subjecting the monomolecular film at portions on which said inorganic pattern is to be formed, to physical treatment to allow the functional groups to be chemically bonded to each other.
Claim 25
Independent Claim
101 words
A method of manufacturing an inorganic pattern, which comprises the steps of reacting a silane type surface active agent containing a straight hydrocarbon chain and a functional group with the entire surface of inorganic fine particles to form a monomolecular film of the agent on said surface of inorganic fine particles, thereafter making the inorganic fine particles covered with the monomolecular film in a predetermined density on a substrate, and thereafter subjecting the monomolecular film at portions on which said inorganic pattern is to be formed, to physical treatment to allow the functional groups to be chemically bonded to each other.
Claim 26
Independent Claim
125 words
A method of manufacturing an inorganic pattern, which comprises the steps of reacting a silane type surface active agent containing a straight hydrocarbon chain and a functional group with the entire surface of inorganic fine particles to form a monomolecular film of the agent on said surface of inorganic fine particles, thereafter making the inorganic fine particles covered with the monomolecular film in a predetermined density on a substrate, thereafter making the inorganic fine particles covered with the monomolecular film in a predetermined density on a substrate, thereafter subjecting the monomolecular film at portions on which said inorganic pattern is to be formed, to physical treatment to allow the functional groups to be chemically bonded to each other, and thereafter heat treating said inorganic pattern.
Claim 27
Independent Claim
125 words
A method of manufacturing an inorganic pattern, which comprises the steps of reacting a silane type surface active agent containing a straight hydrocarbon chain and a functional group with the entire surface of inorganic fine particles to form a monomolecular film of the agent on said surface of inorganic fine particles, thereafter making the inorganic fine particles covered with the monomolecular film in a predetermined density on a substrate, thereafter making the inorganic fine particles covered with the monomolecular film in a predetermined density on a substrate, thereafter subjecting the monomolecular film at portions on which said inorganic pattern is to be formed, to physical treatment to allow the functional groups to be chemically bonded to each other, and thereafter heat treating said inorganic pattern.
Claim 28
Dependent Claim
23 words
The method of manufacturing a magnetic recording layer according to claim 15, wherein said physical treatment is carried out in a magnetic field.
Claim 29
Dependent Claim
30 words
The method of manufacturing a magnetic recording layer according to claim 15, wherein said film of magnetic inorganic fine particles is formed by a spin coating technique on said substrate.
Claim 30
Dependent Claim
35 words
The method of manufacturing a magnetic recording layer according to claim 15, wherein the step of forming said film of the magnetic inorganic fine particles onto the substrate is carried out with a Langmuir-Blodgett's method.
Claim 31
Dependent Claim
32 words
The method of manufacturing a magnetic recording layer according to claim 18, wherein the step of forming said film of the magnetic inorganic fine particles is carried out in a magnetic field.
Claim 32
Dependent Claim
70 words
The method of manufacturing a magnetic recording layer according to claim 15, wherein a step of magnetizing the magnetic inorganic fine particles is carried out between the step of forming the monomolecular film of silane type surface active agent uniformly on the surface of said magnetic inorganic fine particles and the step of forming the film of said magnetic inorganic fine particles on the substrate for the magnetic recording layer.
References Cited (Backward Citations)
US4761316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |