Class / Patent application number | Description | Number of patent applications / Date published |
427129000 | With pretreatment of base | 12 |
20080213469 | METHOD AND APPRATUS FOR HIGH DENSITY NANOSTRUCTURES - A method and apparatus for high density nanostructures is provided. The method and apparatus include Nano-compact optical disks, such as nano-compact disks (Nano-CDS). In one embodiment a 400 Gbit/in | 09-04-2008 |
20080241369 | METHOD OF FABRICATING A MAGNETIC SHIFT REGISTER - A magnetic data track used in a magnetic shift register memory system may be fabricated by forming a multilayered stack of alternating dielectric and/or silicon layers. A trench is etched in the multi-layer stack structure. A selective etching process is used to corrugate the walls of trench. A seed layer is applied to the walls and bottom of the trench; the seed layer is covered with a magnetic layer. The trench is filled with an insulating material. A patterned layer is applied and portions of insulating material exposed by the pattern are removed, forming holes. Magnetic material and seed layer exposed in holes is selectively removed. The holes are filled with insulating material and connecting leads are attached to data tracks. | 10-02-2008 |
20090029041 | Method of cleaning a substrate for a magnetic recording medium and a method of manufacturing a magnetic recording medium - The invention provides a method of cleaning a magnetic recording medium substrate that removes residual substances and suppresses oxidation of the substrate surface. The method of cleaning the magnetic recording medium substrate uses nano-bubble water. Also disclosed is a method of manufacturing a magnetic recording medium that includes the method of cleaning the magnetic recording medium substrate and steps of sequentially forming at least a magnetic layer, a protective layer, and a liquid lubricant layer on the cleaned substrate. | 01-29-2009 |
20090136659 | METHOD FOR PRODUCING GLASS SUBSTRATE FOR MAGNETIC DISK AND METHOD FOR PRODUCING MAGNETIC DISK - In a method in which a cut line is formed on one surface of a planar glass material, and the cut line is allowed to extend in the thickness direction of the glass material, thereby cutting a glass substrate from the glass material, the cut line is selectively formed on a surface having relatively small surface waviness out of two opposing surfaces of the glass material. In the case of a glass material formed into a planar shape on a molten metal, the surface which has come into contact with the molten metal is selected as the surface having relatively small surface waviness. When a disk-shaped glass substrate is cut from the glass material, cutting is performed under conditions where either one of the thickness and the radius of the glass material and the maximum height of surface waviness of the glass material satisfy a predetermined relationship. | 05-28-2009 |
20090280241 | METHOD FOR MANUFACTURING GLASS SUBSTRATE FOR MAGNETIC DISK AND METHOD FOR MANUFACTURING MAGNETIC DISK - This invention provides a method for manufacturing a glass substrate for a magnetic disk comprising a chemical strengthening step. The method provides a glass substrate for a magnetic disk that can suppress the occurrence of very small waves in cooling a glass substrate after the chemical strengthening step, and, while preventing troubles such as head crush and thermal asperity, can realize lowered flying height of a magnetic head and high-density information recording, and is particularly suitable for application to small-size magnetic disks for portable information equipment. In the step of cooling after the chemical strengthening step, cooling treatment is carried out in which the glass substrate is brought into contact with a treatment liquid containing a melt of a material having a solidification temperature below that of a chemical strengthening salt. The temperature of the treatment liquid is regulated to be below the temperature of the chemical strengthening salt melted liquid in the chemical strengthening step. | 11-12-2009 |
20100104743 | METHOD OF MANUFACTURING A GLASS SUBSTRATE FOR MAGNETIC DISK - In a manufacturing method of a glass substrate for a magnetic disk including a cleaning process of the glass substrate, the cleaning process includes a process of contacting the glass substrate with a cleaning solution containing a compound, such as thioglycolic acid or a thioglycolic acid derivative, having a thiol group as a functional group. | 04-29-2010 |
20100221417 | AQUEOUS CLEANING COMPOSITION FOR SUBSTRATE FOR PERPENDICULAR MAGNETIC RECORDING HARD DISK - An aqueous cleaning composition for a substrate for a perpendicular magnetic recording hard disk including a Ni—P containing layer contains at least one surfactant selected from the group consisting of surfactants represented by Formulas (1) to (6) and has a pH at 25° C. of 5 or less. | 09-02-2010 |
20120015099 | STRUCTURE AND METHOD FOR FABRICATING A MAGNETIC THIN FILM MEMORY HAVING A HIGH FIELD ANISOTROPY - A method for depositing uniform and smooth ferromagnetic thin films with high deposition-induced microstructural anisotropy includes a magnetic material deposited in two or more static oblique deposition steps from opposed directions to form a free layer having a high kink Hk, a high energy barrier to thermal reversal, a low critical current in spin-torque switching embodiments, and improved resistance to diffusion of material from adjacent layers in the device. Nonmagnetic layers deposited by the static oblique deposition technique may be used as seed layers for a ferromagnetic free layer or to generate other types of anisotropy determined by the deposition-induced microstructural anisotropy. Additional magnetic or non-magnetic layers may be deposited by conventional methods adjacent to oblique layer to provide magnetic coupling control, reduction of surface roughness, and barriers to diffusion from additional adjacent layers in the device. | 01-19-2012 |
20120058259 | ELECTROLESS NICKEL ALLOY PLATING BATH AND PROCESS FOR DEPOSITING THEREOF - An aqueous nickel phosphorus tin alloy electroless plating bath and process for depositing a nickel phosphorus tin alloy onto a substrate, particularly an aluminum substrate for memory disk applications, wherein the nickel phosphorus tin alloy deposit provides enhanced thermal stability, as defined by the inhibition of crystallization and suppression of magnetization upon high temperature annealing when compared to typical NiP deposits. | 03-08-2012 |
20120148735 | MAGNETIC RANDOM ACCESS MEMORY (MRAM) WITH ENHANCED MAGNETIC STIFFNESS AND METHOD OF MAKING SAME - A spin toque transfer magnetic random access memory (STTMRAM) element and a method of manufacturing the same is disclosed having a free sub-layer structure with enhanced internal stiffness. A first free sub-layer is deposited, the first free sub-layer being made partially of boron (B), annealing is performed of the STTMRAM element at a first temperature after depositing the first free sub-layer to reduce the B content at an interface between the first free sub-layer and the barrier layer, the annealing causing a second free sub-layer to be formed on top of the first free sub-layer and being made partially of B, the amount of B of the second free sub-layer being greater than the amount of B in the first free sub-layer. Cooling down the STTMRAM element to a second temperature that is lower than the first temperature and depositing a third free sub-layer directly on top of the second free layer, with the third free sub-layer being made partially of boron (B), wherein the amount of B in the third sub-free layer is less than the amount of B in the second free sub-layer. | 06-14-2012 |
20130084386 | METHOD OF MANUFACTURING A GLASS SUBSTRATE FOR A MAGNETIC DISK AND METHOD OF MANUFACTURING A MAGNETIC DISK - A method of manufacturing a magnetic disk glass substrate has a cleaning step of cleaning the glass substrate. In the cleaning step, the cleaning is performed under an acidic condition using a cleaning liquid containing oxalate ions and bivalent iron ions. In parallel with the cleaning step or before or after the cleaning step, trivalent iron ions generated by oxidation of the bivalent iron ions contained in the cleaning liquid are reduced by ultraviolet irradiation. | 04-04-2013 |
20140308441 | METHOD OF MANUFACTURING RARE-EARTH MAGNETS - A method of manufacturing rare-earth magnets includes, a first step of producing a compact C by subjecting a sintered body S, which is formed of a RE—Fe—B main phase MP having a nanocrystalline structure (where RE is at least one of neodymium and praseodymium) and a grain boundary phase BP of an RE—X alloy (where X is a metal element) located around the main phase, to hot plastic processing that imparts anisotropy; and a second step of producing a rare-earth magnet RM by melting a RE—Y—Z alloy which increases the coercive force of the compact C (where Y is a transition metal element, and Z is a heavy rare-earth element), together with the grain boundary phase BP, and liquid-phase infiltrating the RE—Y—Z alloy melt from a surface of the compact C. | 10-16-2014 |