摘要:
A magnetic recording layer is formed on an under-layer comprising a Cu crystalline grain layer and a deposited nitrogen atom layer on the Cu crystalline grain layer surface. Then the magnetic recording layer comprising very small average grain diameter and sharp grain diameter distribution is obtained. The magnetic recording medium comprising the magnetic recording layer shows excellent signal to noise ratio at high density recording.
摘要:
A magnetic recording medium which allows high density recording and has excellent durability can be obtained. A magnetic recording medium includes: a plurality of ferromagnetic material dots arranged on a soft magnetic layer formed on a non-magnetic substrate so as to be separated from one another; and carbon films which are formed on the respective ferromagnetic material dots, each carbon film having a smooth film face shape in a section passing through the center of each ferromagnetic material dot and a film thickness gradually decreasing from the center of the ferromagnetic material dot toward an outer edge thereof.
摘要:
According to one embodiment, a method for manufacturing a substrate for a discrete track recording media, the method includes forming an imprint resist layer on a substrate, imprinting, on the imprint resist layer, a stamper formed with patterns of protrusions and recesses corresponding to recording track zones and servo zones to transfer the patterns of protrusions and recesses to the imprint resist layer, removing the stamper from the imprint resist layer, and diffusing liquefied CO2 in a process chamber set at a pressure of 2 to 5 atm, diffusing liquefied H2O in the process chamber set at a pressure of 0.01 to 1 atm, or diffusing a reactive gas selected from a group consisting of liquefied CF4, CHF3, SF6, and C2F6 in the process chamber set at an arbitrary pressure, to jet spray the liquefied gas onto a surface of the substrate.
摘要翻译:根据一个实施例,一种用于制造用于离散轨道记录介质的基板的方法,所述方法包括在基板上形成压印抗蚀剂层,在压印抗蚀剂层上压印形成有对应于记录的突起和凹部的图案的压模 轨道区域和伺服区域,以将突起和凹陷的图案转印到抗蚀剂层,从压印抗蚀剂层移除压模,并将液化CO 2扩散到设置在压力为2的处理室中 至5atm,在处理室中扩散液化H 2 O 2,压力为0.01至1atm,或扩散选自液化CF 4 >,CHF 3 3,SF 6 6和C 2 F 6 6在设置在任意压力下的处理室中 将液化气喷射到基板的表面上。
摘要:
A magnetic recording media includes a toroidal substrate, a surface thereof is divided into a recording area located in a central part between an outer peripheral edge and an inner peripheral edge, edge areas located within 100 μm or more and 2,000 μm or less from the outer and inner peripheral edges, respectively, and adjacent areas located between the edge areas and the recording area, respectively, a magnetic film on the substrate, and a protective film on the magnetic film, in which the magnetic film is thinner in the edge areas than that in the adjacent areas, and at least a part of the protective film in the edge areas is thicker than that in the adjacent areas.
摘要:
According to one embodiment, a patterned substrate used for a magnetic recording media having discrete tracks includes patterns of protrusions and recesses processed thereon, and a texture structure formed on each of the recesses.
摘要:
According to one embodiment, a magnetic recording apparatus has a magnetic recording media including a substrate having protrusions and recesses corresponding to a servo zone and a data zone and a magnetic layer deposited thereon, and a read/write head including a pair of magnetic shields and a giant magnetoresistive element, in which a track pitch of the media ranges 20 to 300 nm, a linear velocity of the magnetic recording media is 11 m/s, and a distance m from the magnetic shield to the magnetic layer on the protrusions of the media and a distance d between the magnetic layer on the protrusions and that on the recesses in the servo zone of the media are satisfies the condition that the value of d/m is 0.2 or more and 3 or less.
摘要:
According to one embodiment, a method for manufacturing a magnetic recording medium includes forming patterns having protrusions and recesses of a ferromagnetic material onto a recording track section and a servo section on a substrate, forming a flattening film, a top surface of which is higher than that of the protrusion of the ferromagnetic material, onto the ferromagnetic material, and performing ion beam etching onto the flattening film up to a top surface of the protrusion of the ferromagnetic material, and determining an end point of flattening etching on the basis of a change in the total number of incident particles by means of an ion counter installed so as to be at an angle θ with respect to a perpendicular direction to the substrate in accordance with a material of the flattening film.
摘要:
An imprint apparatus configured such that it can press a laminate structure in which a magnetic film and a resist film are sequentially laminated on a substrate. The imprint apparatus includes a first press plate configured to mount the laminate structure, a second press plate adapted for sandwiching the laminate structure, a stamper placed on a surface of the second press plate, and has projections and recesses configured to be transferred onto the resist film, and a light source configured to dispose on the same plane as the laminate structure, and is oriented so that the light source can shine the resist film.
摘要:
A magnetic recording medium has a substrate, and a servo signal recording magnetic layer whose magnetization is oriented in a direction perpendicular to a surface thereof, a non-magnetic layer and a data recording magnetic layer, which are stacked on the substrate in the order mentioned. The servo signal recording magnetic layer has a coercivity higher than that of the data recording magnetic layer. The servo signal recording magnetic layer has servo tracks formed with a track pitch Tps, the servo tracks adjacent to each other in a track width direction being magnetized to opposite directions perpendicular to the film surface.
摘要:
A magnetic recording medium capable of alleviating thermal fluctuation and improving the recording density includes a functional layer (12) containing a magnetic material, and a recording layer (11) overlying the functional layer and containing a magnetic material. The recording layer contains a plurality of magnetic grains (51) and a nonmagnetic material (52) existing among the magnetic grains, and the functional layer and the recording layer exert exchange coupling interaction in a direction making a substantially orthogonal relation with each other at the room temperature.