摘要:
Disclosed is a lubricant composition comprising at least one kind of compound represented by following formula (1): where X represents a cyclic group that may be substituted; Y represents a divalent or higher-valent linking group having at least one polar group and having no aromatic cyclic group; p1 represents an integer of 1 to 4; p2, p3, and p4 each represent an integer of 0 to 4; q represents an integer of 0 to 30; n represents an integer of 1 to 10; s represents an integer of 1 to 4; and t represents an integer of 2 to 10.
摘要:
Embodiments of the invention provide a manufacturing method for a disk drive which allows highly accurate recording of servo data without substituting the internal gas of the disk drive, and such a magnetic disk drive and servo track writer. In one embodiment, a disk, a magnetic head slider with a head for writing data onto and reading out data from the disk, a suspension for retaining the magnetic head slider, an arm for supporting the suspension, and a driving section for driving the arm are stored into an enclosure. When a servo track write operation is conducted, the enclosure interior is depressurized to an atmospheric pressure lower than normal pressure and then servo data is recorded on the disk.
摘要:
[Problem] Provided is a novel lubricant composition that is useful as a material of a lubricating layer of a magnetic recording medium.[Means for Resolution] The lubricant composition contains at least one kind of compound represented by the following Formula (1). In the formula, X represents a cyclic group that may be substituted, and Y represents a single bond or a linking group having a valency of 2 or more. Here, at least one of X and Y includes 1 or more polar groups such as a hydroxyl group; Z represents a linking group having a valency of 2 or more and constituted with a carbon atom (C), a fluorine atom (F), and 1 or 2 kinds of arbitrary atoms (here, a hydrogen atom is excluded); n represents a real number of 1 to 10; m represents a real number of 0 to 1; and s and t independently represent a real number of 1 or greater. XYZ—CnF2n+1−mHm]s]t (1)
摘要:
Disclosed is a lubricant composition comprising at least one kind of compound represented by following formula (1): where X represents a cyclic group that may be substituted; Y represents a divalent or higher-valent linking group having at least one polar group and having no aromatic cyclic group; p1 represents an integer of 1 to 4; p2, p3, and p4 each represent an integer of 0 to 4; q represents an integer of 0 to 30; n represents an integer of 1 to 10; s represents an integer of 1 to 4; and t represents an integer of 2 to 10.
摘要:
[Problem] Provided is a novel lubricant composition that is useful as a material of a lubricating layer of a magnetic recording medium.[Means for Resolution] The lubricant composition contains at least one kind of compound represented by the following Formula (1). In the formula, X represents a cyclic group that may be substituted, and Y represents a single bond or a linking group having a valency of 2 or more. Here, at least one of X and Y includes 1 or more polar groups such as a hydroxyl group; Z represents a linking group having a valency of 2 or more and constituted with a carbon atom (C), a fluorine atom (F), and 1 or 2 kinds of arbitrary atoms (here, a hydrogen atom is excluded); n represents a real number of 1 to 10; m represents a real number of 0 to 1; and s and t independently represent a real number of 1 or greater. XYZ—CnF2n+1-mHm]s]t (1)
摘要:
A method for testing a mold structure including magnetically transferring a magnetic signal according to a concavo-convex pattern for a servo area in a mold structure to a perpendicular magnetic recording medium; electrically reproducing ≧50 tracks of the magnetic signal of servo data transferred onto the perpendicular magnetic recording medium using a magnetic head to obtain a reproduction signal; and calculating a pattern drawing accuracy radially from the reproduction signal to evaluate a performance of the mold structure including a disc-shaped base material; and the concavo-convex pattern for the servo area and a concavo-convex pattern for a data area formed on a base material surface following a desired design pattern. The concavo-convex patterns for the servo area are aligned in the radial direction of the base material, and the concavo-convex pattern for the data area are aligned in the circumferential direction between the concavo-convex patterns for the servo area.
摘要:
To provide an imprint mold structure for producing a magnetic recording medium, the imprint mold structure including: a first pattern corresponding to servo areas, a second pattern corresponding to data areas, and a shape corresponding to one or more non-patterned areas, wherein the magnetic recording medium includes the servo areas where servo data is to be recorded, and the data areas which include a pattern to write user data on, and wherein the data areas have the one or more non-patterned areas which do not include a pattern to write user data on and which are substantially concentric areas each composed of two or more adjacent tracks located in the data areas.
摘要:
Embodiments of the invention provide a manufacturing method for a disk drive which allows highly accurate recording of servo data without substituting the internal gas of the disk drive, and such a magnetic disk drive and servo track writer. In one embodiment, a disk, a magnetic head slider with a head for writing data onto and reading out data from the disk, a suspension for retaining the magnetic head slider, an arm for supporting the suspension, and a driving section for driving the arm are stored into an enclosure. When a servo track write operation is conducted, the enclosure interior is depressurized to an atmospheric pressure lower than normal pressure and then servo data is recorded on the disk.