摘要:
A low cost magnetic recording medium having low surface roughness and a method for manufacturing the magnetic recording medium are provided. A soft magnetic layer 16 has a laminate structure including a first soft magnetic layer 26 on the substrate 12 side and a second soft magnetic layer 28 on the recording layer 20 side. The second soft magnetic layer 28 is formed such that the surface roughness of the surface 28A on the recording layer 20 side of the second soft magnetic layer 28 is less than the surface roughness of the base surface 12A of the substrate 12 and is less than the surface roughness of the surface 26A on the recording layer 20 side of the first soft magnetic layer 26.
摘要:
A rotary-type magnetic recording medium has servo patterns formed in servo pattern regions on a substrate by patterns including recording regions and non-recording regions. Burst signal units composed of the recording regions or the non-recording regions are formed in burst pattern regions in the servo pattern regions. The burst signal units are formed so that for at least one edge out of both edges along a direction of rotation of the magnetic recording medium, a center in the direction of rotation is positioned closer to the other edge than both ends in the direction of rotation, and a ratio of a length along a radial direction of the magnetic recording medium between both ends and the center of the one edge to a length along the radial direction between both ends of the one edge and both ends of the other edge is in a range of 0.2 or below.
摘要:
A magnetic recording medium and a method for manufacturing the same are provided, which provide high surface recording density and high recording/reading performance. The magnetic recording medium is manufactured by forming an intermediate protective layer between a continuous recording layer and a mask layer, dividing the continuous recording layer to form divided recording elements and removing the mask layer while leaving the intermediate protective layer on the top of the divided recording elements. Further, gaps between the divided recording elements are filled with a non-magnetic material while leaving the intermediate protective layer on the top of the divided recording elements.
摘要:
A production apparatus, which enable the efficient production of a discrete type magnetic recording medium, while reliably preventing any deterioration of the partitioned recording elements. The magnetic recording medium production apparatus includes: recording layer processing device, which by forming a plurality of grooves, with a spacing therebetween in a planar direction, in an intermediate product of a magnetic recording medium comprising a continuous recording layer, partitions the continuous recording layer into a plurality of partitioned recording elements; non-magnetic body filling device for filling the grooves between the partitioned recording elements with a non-magnetic body; protective layer formation device for forming a protective layer on the partitioned recording elements and the non-magnetic body; and vacuum retention device which houses the recording layer processing device, the non-magnetic body filling device, and the protective layer formation device, and maintains the environment surrounding the intermediate product in a state of vacuum.
摘要:
An imprinting apparatus according to the present invention is configured to be capable of removing a stamper having one surface thereof formed with a concave/convex portion and having flexibility, from a resist layer to which shapes of the concave/convex portion of the stamper have been transferred by pressing the concave/convex portion of the stamper against the resist layer on a disk-shaped substrate. The imprinting apparatus comprises a suction device (a suction section, an air pump, and a restrictor) configured to be capable of sucking a predetermined part of the other surface of the stamper to thereby remove the predetermined part from the resist layer such that a removal completion range of the stamper can be gradually expanded from a state where the predetermined part is removed from the resist layer by the suction device.
摘要:
A magnetic recording medium is provided, which has a recording layer formed in a concavo-convex pattern and makes it possible to obtain the stable flying characteristics of a head. In the magnetic recording medium, concave portions between recording elements are filled with a non-magnetic material. Thus, the surface of the magnetic recording medium takes a concavo-convex shape which is different from the concavo-convex pattern of the recording layer. Also, the arithmetical mean deviation of the assessed profile of the concavo-convex shape in the surface is restricted to 1 nm or less.
摘要:
A magnetic recording medium is provided which has good recording/reproducing characteristics with a recording layer divided in a number of recording elements by a predetermined concavo-convex pattern, and a manufacturing method that enables efficient manufacture of such a magnetic recording medium. The magnetic recording medium includes a substrate, a soft magnetic layer formed over the substrate, a recording layer formed over the soft magnetic layer such as to have magnetic anisotropy in a direction perpendicular to surface, and being divided in a number of recording elements by a predetermined concavo-convex pattern, and a non-magnetic intermediate layer formed between the recording layer and the soft magnetic layer. The recording elements are formed to have a predetermined track shape in a data region.
摘要:
A mold having a pattern of a concavo-convex surface including protrusion and recess is prepared and the pattern is transferred to a resist layer formed on a substrate by an imprinting method. The side surface of a protrusion of the transferred resist pattern is then etched so that the protrusion has a width narrower than a width of the corresponding recess formed to the mold. This resist pattern forming method is preferably applicable to a magnetic recording medium manufacturing method and a magnetic head manufacturing method.
摘要:
There are provided a next process-determining method capable of determining a next process to be carried out next objectively and at the same time in a short time period, as well as an inspecting method and apparatus which are capable of carrying out a predetermined inspection as to an object to be inspected according to the next process-determining method. A sample object is digitized to sample data formed by digital data. The sample data is compressed into compressed sample data according to a predetermined data format. There is calculated a difference data amount between a data amount of the compressed sample data and a data amount of reference data formed by digitizing and compressing a reference sample object in the same manner as the sample object is processed. Which of a plurality of predetermined numerical ranges the difference data amount belongs to is identified. A predetermined process is determined which is associated with the identified numerical range in advance as a next process to be carried out next.
摘要:
A method for manufacturing an information recording medium, a method of transferring a concavo-convex pattern, and a transfer apparatus are provided which are capable of curing a resin material with reliability even when using a light-transmitting stamper repeatedly. A stamper made of a light-transmitting resin, having a predetermined concavo-convex pattern formed on its transfer area, is inspected for an optical characteristic. The stamper is brought into contact with an energy-ray curable resin material applied to an object to be processed, thereby transferring the concavo-convex pattern to the resin material, and the resin material is irradiated with an energy ray through the stamper so that the resin material cures. The stamper is used a plurality of times to repeat these steps a plurality of times, thereby manufacturing a plurality of information recording media.