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Ching-Ray Chang

Ching-Ray Chang, Taipei TW

Patent application numberDescriptionPublished
20090092858PERPENDICULAR MAGNETIC RECORDING FILM MEDIUM AND METHOD OF MANUFACTURING THE SAME - The perpendicular magnetic recording medium of the present invention includes a substrate, a non-magnetic layer, a ferromagnetic layer and an antiferromagnetic oxide. The non-magnetic layer is formed on the substrate and the ferromagnetic layer is formed on the non-magnetic layer. The antiferromagnetic oxide is formed in the ferromagnetic layer after the perpendicular magnetic recording medium is annealed by an annealing process. An exchange coupling interaction between the antiferromagnetic oxide and the ferromagnetic materials is introduced.04-09-2009
20090162702PERPENDICULAR MAGNETIC RECORDING MEDIUM AND METHOD FOR FABRICATING THE SAME - A magnetic recording medium is provided in the present invention. The magnetic recording medium including a substrate; a base layer disposed on the substrate; an intermediate layer disposed on the base layer; and a recording layer disposed on the intermediate layer and including a magnetic matrix and a plurality of non-magnetic particles percolated in the magnetic matrix.06-25-2009
20090284669Data storing device and storing method for the same - A memory cell is provided in the present invention. The memory cell includes a first electrode receiving a first voltage to form an electric field therearound; and a combination arranged on the first electrode, comprising a liquid crystal molecule coupled with a magnetic substance for forming a magnetic field therearound, wherein the magnetic field changing with the first electric field.11-19-2009
20110061770METHOD FOR ORDERING A DISORDERED ALLOY AND METHOD FOR MAKING A PERPENDICULAR MAGNETIC RECORDING MEDIUM - A method for ordering a disordered alloy includes: simultaneously ion bombarding and annealing a disordered alloy to transform the disordered alloy from a disordered crystalline state to an ordered crystalline state. A method for making a perpendicular magnetic recording medium which includes an ordered alloy layer is also disclosed.03-17-2011
20110070373METHOD FOR FORMING AN ORDERED ALLOY - A method for forming an ordered alloy includes: (a) forming a layer of a first metal with a layer thickness of less than 0.3 nm over a substrate; (b) forming a layer of a second metal with a layer thickness of less than 0.3 nm on the layer of the first metal under an elevated temperature sufficient to cause interdiffusion of atoms of the first and second metals between the layer of the first metal and the layer of the second metal so as to form the ordered alloy; and (c) repeating steps (a) and (b) until a predetermined layer thickness of the ordered alloy is achieved.03-24-2011
20110104517SINGLE-LAYERED FERROMAGNETIC RECORDING FILM WITH PERPENDICULAR MAGNETIC ANISOTROPY - The present invention discloses a single-layered recording film with perpendicular magnetic anisotropy. The single-layered recording film includes a substrate and a ferromagnetic layer. The ferromagnetic layer is formed on the substrate and annealed by a rapid thermal annealing process. After annealing, the average grain size of the single-layered recording film is close to the film thickness of ferromagnetic layer, which is beneficial to achieve a single-layered recording film with perpendicular magnetic anisotropy.05-05-2011

Patent applications by Ching-Ray Chang, Taipei TW

Ching-Ray Chang, Taipei City TW

Patent application numberDescriptionPublished
20090246362HEAT ASSISTED MAGNETIC RECORDING MEDIUM AND METHOD FOR FABRICATING THE SAME - A novel heat assisted magnetic recording (HAMR) medium and the fabrication method therefor are provided. The exchange coupling effect occurring at the interface of FePt/CoTb double layers is adopted, and thus the resulting magnetic flux would be sufficient enough to be detected and readout under the room temperature. The provided HAMR medium exhibits a relatively high saturation magnetization and perpendicular coercivity, and thus possesses a great potential for the ultra-high density recording application.10-01-2009
20100124673HIGH DENSITY MAGNETIC RECORDING FILM AND METHOD FOR MANUFACTURING THE SAME BY USING RAPID THERMAL ANNEALING TREATMENT - A high density magnetic recording film by using a rapid thermal annealing process is provided. The high density magnetic recording film includes a substrate; and a ferromagnetic layer formed on the substrate; wherein the rapid thermal annealing process is performed for the ferromagnetic layer at a temperature range of 600 to 800° C. for 5 to 180 seconds with a heating ramp rate of 60 to 100° C./sec so as to obtain the high density magnetic recording film.05-20-2010

Patent applications by Ching-Ray Chang, Taipei City TW