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Class 428/846.4 - Anodized or oxidized aluminum or aluminum-base alloy


Subclass of Class 428 - Stock material or miscellaneous articles
Definition: Subject matter in which an aluminum or aluminum-base
No. of patents: 19
Last issue date: 10/14/2008


NumberTitleIssue Date
7435488Fine structural body and method of producing the same
Described is a structural body including at least partially an aluminum member having on a surface an anodized film with micropores present, in which: the micropores have a coefficient of variation in pore size of 5 to 50%; and the micropores are each sealed with a ...
10/14/2008
7300595Method for filling concave portions of concavo-convex pattern and method for manufacturing magnetic recording medium
A method for filling concave portions of a concavo-convex pattern by which the concave portions of the concavo-convex pattern can be filled to flatten the surface with reliability, and a method for manufacturing a magnetic recording medium by which a magnetic record...
11/27/2007
7288203Process for producing structure, process for producing magnetic recording medium, and process for producing molded product
A process for producing a structure having a porous layer is provided. The process forms the porous layer with high thickness-controllability. The process comprises steps of preparing a layered product having, on a substrate, a first nonporous layer and a second non...
10/30/2007
7286324Cobalt-platinum or iron-plantinum magnetic material containing 1% to 40% Cu, Ni or B
A CoPt- or FePt-alloy magnetic material in which a temperature to transform into an L10-ordered alloy is reduced and magnetic anisotropy energy is controlled, and a method for manufacturing the magnetic material are provided. In a CoPt- or FePt-alloy magn...
10/23/2007
7183012Structure having pores, magnetic recording medium, and method of manufacturing same
The invention provides a magnetic recording medium and a method of manufacturing the magnetic recording medium, in which a high density and good storage stability can be achieved by giving anisotropy in shape to a magnetic substance. A plan shape of the magnetic sub...
02/27/2007
7167342Magnetic recording medium, magnetic recording playback device, and information processing device
A magnetic recording medium is provided while including a recording layer in which magnetic materials are in the shape of a circular cylinder and uniformity and size reduction are achieved simultaneously. The magnetic recording medium includes a recording layer and ...
01/23/2007
7112377Magnetic recording medium, method of manufacturing the same, magnetic medium substrate employed in the magnetic recording medium, and magnetic storage unit
A magnetic recording medium is disclosed that includes a substrate; an anodic alumina film formed on the substrate; a pore formed in the anodic alumina film; a carbon layer covering the surface of the anodic alumina film and the inner wall of the pore; a magnetic pa...
09/26/2006
6624101Glass-ceramic composition for recording disk substrate
A glass ceramics composition for recording disk substrate contains, essentially, expressed in terms of weight percent on the oxide basis, from 51 to 57.5 wt % of SiO2, from 10 to 30 wt % of Al2 O3, from 10 to 30 wt % of Mg...
09/23/2003
5277960Substrate for magnetic recording medium and process of producing the same
The first invention provides a substrate for a magnetic recording medium, which is prepared by forming a macro-concavo-convex pattern for improving CSS properties and a micro-concavo-convex pattern for improving magnetic properties on the surface, thereby...
01/11/1994
5209837Process for preparing magnetic disk
This invention relates to a process for preparing a magnetic disk, which comprises (a) subjecting a substrate having an anodized aluminum film to mirror surface-finishing, (b) widening pores of the anodized aluminum film by chemical dissolution treatment ...
05/11/1993
5139884Magnetic recording medium comprising an aluminum substrate in which pores formed by anodic oxidation contain crystallographicaly discontinuous particles of Fe-alloy
Provided according to the present invention are a perpendicular magnetic recording medium filled with a magnetic metal containing Fe as a main component in the fine pores of an alumite formed by anodic oxidation of a surface of an Al or Al alloy substrate...
08/18/1992
5108812Substrate for a magnetic disk and process for its production
A substrate for a magnetic disk, having fine roughness formed on its surface by subjecting aluminum or an aluminum alloy to anodic oxidation, packing pores in the anodized layer thereby formed, with a material different in the physicochemical properties f...
04/28/1992
5047274Annodized aluminum substrate for a magnetic recording disk in which pores are filled with a non magnetic material and the surface polished and etched
A substrate for a magnetic recording disk, made of anodized aluminum having its pores packed with a non magnetic material and having been subjected to polishing followed by an etching treatment to form a finely roughened surface due to preferential etchin...
09/10/1991
4808279Process for preparing magnetic recording material
The invention provides a process for preparing magnetic recording material by depositing ferromagnetic material in particulate form into an aluminum substrate. The aluminum substrate is prepared by cleaning an aluminum or aluminum metal containing substra...
02/28/1989
4678547Anodized memory disk substrate and method of manufacturing the same
An anodized memory disk substrate is disclosed, which is characterized in having an anodic film having excellent heat resistance and hardness and having a thickness of not less than 3 μm on the surface of aluminum or an aluminum alloy substrate imparted ...
07/07/1987
4650708Magnetic recording material and a method for producing the same
In production of a magnetic recording material which accumulates information in magnetic substance packed in micro pores extending in the thickness direction of an anodic oxide surface layer formed on an aluminum foil by anodic oxidation and electrolylic ...
03/17/1987
4548682Process of producing magnetic recording media
A magnetic recording medium having excellent magnetic properties and a uniform recording envelope suitable for, in particular, high-density recording is obtained by packing a magnetic substance in the micro pores of anodic oxide film formed on an aluminum...
10/22/1985
4525759Aluminum storage disc
A process for the metal plating of aluminum comprising the steps of electrolytically anodizing the surface of the aluminum, immersing the anodized aluminum into an electrolytic plating solution and initiating deposition by passing a current through the so...
06/25/1985
4109287Process for recording information or sound and process for preparation of recording materials used therefor
This invention provides a magnetic recording material having a regular orientation which comprises aluminum or aluminum alloy on the surface of which a film having a great number of micro pores is formed by an anodic oxidation, each of said pores being pa...
08/22/1978
 
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