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| Number | Title | Issue Date |
| 7476454 | Substrate for magnetic recording medium Provided is a surface-treated substrate in which the roughness of the surface of the substrate is controlled. The surface-treated substrate can form a magnetic recording medium in which head flying stability is maintained and which has a magnetic film that can achie... | 01/13/2009 |
| 7357998 | Disk substrate for a perpendicular magnetic recording medium, perpendicular magnetic recording disk and manufacturing methods thereof A disk substrate for a perpendicular magnetic recording medium comprises a disk base member, a soft magnetic layer formed on the disk base member, and a protection layer formed on the soft magnetic layer. The soft magnetic layer and the protection layer are deposite... | 04/15/2008 |
| 7318844 | Laser-irradiated metallized electroceramic The manufacturing method for an electroceramic component (1), for example a varistor (1), comprises a laser irradiation of a part (5; 6) of the surface of an electroceramic body (2) before a metallization (3; 4) is applied to the p... | 01/15/2008 |
| 7255942 | Using plated surface for recording media without polishing Ultra smooth as-deposited composite nickel coatings for use in an information storage system are provided. The composite nickel coatings include an electrolessly deposited nickel layer formed on a sputter deposited nickel layer. The composite nickel coatings have an... | 08/14/2007 |
| 7183012 | Structure 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 |
| 7179550 | Member for supporting magnetic disc substrates, process of producing the same, and magnetic disc device using the same A member of supporting magnetic disc substrates is provided, comprising a ceramic sinter containing a ceramic component and at least one conductive component selected from a group consisting of iron, niobium, tin zinc, copper, nickel, cobalt, and chromium, wherein t... | 02/20/2007 |
| 6986956 | Method of coating smooth electroless nickel on magnetic memory disks and related memory devices A method of manufacture of thin film magnetic disks and other useful articles of similar planar geometry in which a non-magnetic layer is first deposited on one or both sides of the disk or article substrate to mask chemical and mechanically induced heterogeneities ... | 01/17/2006 |
| 6677023 | Method of making magnetic recording medium utilizing die A non-magnetic substrate for a magnetic recording medium is formed or molded within a die. The die is designed to define embedment depressions on the surface of the resulting non-magnetic substrate. Any bumps or lugs formed on the inner surface of the die... | 01/13/2004 |
| 6663938 | Media contact zone with bell-shaped texturing features A magnetic data recording medium substrate has a contact zone and a data zone. The contact zone is textured by forming multiple texturing features, each having a bell-shaped profile resembling a Gaussian curve. The features preferably are formed by pulsed... | 12/16/2003 |
| 6624101 | Glass-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 |
| 5506017 | Method for texturing magnetic media This patent teaches a new method of roughening the surface of a magnetic recording medium in order to reduce the stiction and friction between a recording head and the medium to thereby improve mechanical reliability. During this method, the medium substr... | 04/09/1996 |
| 5487931 | Rigid disc substrate comprising a central hard core substrate with a hard, thermally and mechanically matched overlying smoothing layer and method for making the same A rigid magnetic memory disc(28) is disclosed having a substantially flat, central hard core substrate(12) and an overlying smoothing layer(14) deposited thereon. The smoothing layer(14) is subsequently polished to a predetermined thickness. The smoothing... | 01/30/1996 |
| 4816311 | Recording medium that can be magnetized vertically and method for manufacturing same A recording medium which can be magnetized vertically contains a plate-shaped carrier body of nonmagnetic material of which at least one flat side is provided with a thin nonmagnetic intermediate layer having a very smooth surface, to which at least one m... | 03/28/1989 |
| 4808455 | Magnetic recording disc and process for producing the same An improved magnetic recording disc comprising: a substrate member of an alumina-based ceramic material having micropores of 5 μm or below and having a relative theoretical density of 90% or higher; a glass coating layer of a thickness of 3 to 200 μm wi... | 02/28/1989 |
| 4808463 | Substrate for magnetic disks A substrate for magnetic disk comprises a ceramic support having a glaze layer formed on the surface which is to be coated with a magnetic recording material. The ceramic support may be made of alumina, and the glaze layer is made of a material having sub... | 02/28/1989 |
| 4774151 | Low contact electrical resistant composition, substrates coated therewith, and process for preparing such A composition of a metallic compound represented by the formula MT, and G is provided by sputtering an Mx G100-x target. M is a metal selected from the group of titanium, hafnium, zirconium, and mixtures thereof. T is selected from t... | 09/27/1988 |
| 4704179 | Process for producing magnetic discs A process for producing a magnetic disc comprises (1) attaching a flexible disc having a magnetic layer coated thereon to at least one side of a base plate wherein a gap is formed between the back surface of the flexible disc and the base plate and (2) he... | 11/03/1987 |
| 4698716 | Support for magnetic recording disk and its production process The support for a magnetic recording disc according to the invention comprises a metal disk covered by an organic coating and, on the latter, a thin, hard coating of a material based on hydrous silicate or silica.... | 10/06/1987 |
| 4690846 | Recording disk substrate members and process for producing same A substrate member for recording disk characterized in that a glass coating film is provided on an alumina base ceramic material having micropores of no larger than 5 microns and a relative theoretical density of no less than 96%, said glass coating film ... | 09/01/1987 |
| 4673602 | Composite substrate plate for magnetic or optical disk and process for production thereof A composite substrate plate for a magnetic or optical disk, comprising a metal plate, an undercoat resin layer formed on one side or both sides of said metal plate, and a surface resin layer having a mirrorlike surface formed on said undercoat resin layer... | 06/16/1987 |
| 4598017 | Composite magnetic disk with Si and SiC substrate The invention relates to a composite magnetic disk for magnetic recording, which consists of an annular core of polymeric material to which is bonded at least one disk of reaction-bonded silicon carbide with a magnetic recording layer on its outer surface... | 07/01/1986 |
