JP2001357520A - Magnetic transfer device - Google Patents

Abstract

(57) [Problem] To pinch the outer periphery of a magnetic recording medium from both sides with a hand for conveyance via claws from both sides, and to hold the magnetic recording medium in order to hold the magnetic recording medium,
Since a force more than necessary is applied to the magnetic recording medium due to the contact area of the nail at the time of pinching, scratches and dents are generated on the magnetic recording medium. SOLUTION: By applying a magnetic field from the outside while a magnetic transfer master disk is in close contact with a magnetic recording medium, servo information written in a pattern of a soft magnetic material on the surface of the magnetic transfer master disk can be obtained.
In a magnetic transfer device that magnetically transfers to a magnetic recording layer on the surface of the magnetic recording medium, a foreign matter inspection unit that detects abnormal protrusions and foreign matter on the surface of the magnetic recording medium before magnetic transfer,
Handling means for stably holding the magnetic recording medium horizontally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard disk drive using a magnetic film as a recording material, which is mainly used as an external storage device of a computer, for writing / writing data on the surface of a magnetic recording medium such as a hard disk. The read head positioning servo signal is
The present invention relates to a magnetic transfer device for writing using a magnetic transfer technique, and more particularly to a magnetic transfer device having a handling device as a handling means for holding a magnetic recording medium.

[0002]

2. Description of the Related Art Conventionally, in a hard disk drive, data is recorded / reproduced while a magnetic head floats above the surface of a rotating magnetic recording medium at a distance of several tens of nm by a floating mechanism called a slider. Have been. Bit information on the magnetic recording medium is stored in data tracks concentrically arranged on the disk, and the data storage / reproducing head is moved and positioned at a high speed to a target data track on the surface of the magnetic recording medium. In this way, data is recorded and reproduced.

On a magnetic recording medium, a positioning signal (servo signal) for detecting a relative position between a magnetic head and a data track is written concentrically, and a magnetic head for recording and reproducing data is used. They detect their position at regular time intervals. After assembling the magnetic recording medium into the hard disk drive so that the center of this servo signal does not deviate from the center of the disk or the center of the trajectory of the magnetic head, the servo signal is written using a dedicated device called a servo writer. Is written on the magnetic recording medium.

At present, in the development stage, a recording density of 20
With reaching Gbit / in ² , the recording density is increasing at an annual rate of 60% or more. Along with this, the density of servo signals for the magnetic head to detect its own position is increasing, and the writing time of the servo signals tends to increase year by year. Such an increase in the time for writing the servo signal has become one of the major factors that causes a decrease in productivity of the hard disk drive and an increase in cost.

Recently, in contrast to the above-described method of writing a servo signal using a signal writing head of a servo writer, the servo signal is collectively written to a magnetic recording medium by magnetic transfer, and the servo is dramatically increased. Technical developments have been made to shorten the time for writing information.

As described above, when a servo signal is written by magnetic transfer, the master disk and the magnetic recording medium need to be brought into close contact with each other. Therefore, there is a foreign substance on the surface of the magnetic recording medium to which the servo signal is written, or If any projections are present, not only will the quality of the written servo signal be poor, but in the worst case, the master disk will be damaged, making subsequent magnetic transfer impossible. And so on.

Therefore, before writing a servo signal by magnetic transfer, the surface of the magnetic recording medium is optically inspected,
It is necessary to perform a foreign substance inspection for inspecting the surface of the magnetic recording medium for protrusions and foreign substances. Furthermore, as for a method of handling a magnetic recording medium in a foreign substance inspection apparatus, a method and an apparatus that do not cause scratches, dirt, and the like to adhere to the magnetic recording medium are required.

[0008]

A part of the magnetic transfer apparatus for optically inspecting the surface of the magnetic recording medium for abnormal protrusions and foreign matter before transfer is made to hold the magnetic recording medium horizontally by a spindle called an inspection index. Inspection is performed while rotating in the state of being rotated. In handling the magnetic recording medium before and after the inspection, the magnetic recording medium, of course,
In the case where dents, dirt, and the like are attached, the influence of handling on the magnetic recording medium is a major factor in lowering the adhesion between the master and the magnetic recording medium in transfer after inspection. In addition, a mechanism capable of holding horizontally is required for handling of the magnetic recording medium in order to transfer the inspection index of the medium inner peripheral horizontal chuck.

One example of such a conventional handling device is shown in FIGS. 6 and 7. FIG. As shown in the figure, the conventional handling apparatus has a pair of substantially Y-shaped hands 101 disposed on both left and right sides of a magnetic recording medium 100 such as a hard disk, for example. Each of the hand arms 102 has a claw 103 in which a groove 104 having a V-shaped cross section is formed.

With such a handling device, a mechanical pressing force is applied to the outer periphery of the magnetic recording medium 100 such as a hard disk from both sides via claws 103 from both sides by a spring, a piston or the like. There is a method of holding the magnetic recording medium 100 by the groove 104 of the nail 103. However, in such a holding method, an unnecessary force is applied to the magnetic recording medium 100 by a force such as a pressing force for sandwiching the magnetic recording medium 100 or a contact area of the claw 103 at the time of sandwiching. For this reason, this is a major cause of the occurrence of scratches, dents, and the like on the magnetic recording medium 100. Accordingly, an object of the present invention is to solve the above-described conventional problems by stably holding the magnetic recording medium horizontally without applying an extra force to the magnetic recording medium, and also to prevent damage to the magnetic recording medium. It is an object of the present invention to provide a magnetic transfer device having a handling device that does not cause contamination or dirt.

[0011]

According to the present invention, in order to achieve the above-mentioned object, a magnetic transfer apparatus applies a magnetic field from the outside while a magnetic transfer master disk is in close contact with a magnetic recording medium. By doing so, in a magnetic transfer apparatus that magnetically transfers servo information written in a pattern of a soft magnetic material on the surface of the magnetic transfer master disk to a magnetic recording layer on the surface of the magnetic recording medium, And a handling means for stably holding the magnetic recording medium horizontally in a foreign matter inspection unit for detecting abnormal protrusions and foreign matter on the surface of the magnetic recording medium.

Further, the magnetic transfer apparatus of the present invention is characterized in that the handling means has a transfer hand and three support pieces arranged on the same plane of the transfer hand.

Further, the magnetic transfer apparatus of the present invention is characterized in that the transport hand has a bifurcated hand portion, and the support frame is arranged at the vertex of an equilateral triangle. .

Still further, in the magnetic transfer apparatus according to the present invention, the support piece has a conical shape.

In the magnetic transfer apparatus according to the present invention, the support top is made of a resin material or a hard rubber material.

As described above, according to the present invention, the magnetic transfer apparatus applies a magnetic field from the outside while the magnetic transfer master disk is in close contact with the magnetic recording medium.
When magnetically transferring the servo information written on the surface of the magnetic transfer master disk by the pattern of the soft magnetic material to the magnetic recording layer on the surface of the magnetic recording medium, the magnetic recording medium has a magnetic recording medium surface before the magnetic transfer. In a foreign matter inspection unit for detecting abnormal protrusions and foreign matter, a handling device as a handling means having a transport hand provided with three conical support pieces, without applying extra force to the magnetic recording medium, and The magnetic recording medium can be stably held horizontally and supported without rattling without causing any scratches or dirt to adhere to the magnetic recording medium.

Other objects, features and advantages of the present invention will be apparent from the following detailed description of embodiments of the present invention illustrated in the accompanying drawings.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS. 1 to 4 show a handling device as a handling means of a magnetic transfer device of the present invention. FIG. 1 is a vertical sectional view, and FIG. 2 is a plan view. 3 is a plan view of the handling device of FIG. 2 holding a magnetic recording medium, and FIG. 4 is a perspective view of the handling device.

As shown, in these figures:
The magnetic transfer device according to the first embodiment of the present invention
It has a handling device 1 as handling means comprising a flat transport hand 2 having a letter shape. The substantially Y-shaped transfer hand 2 of the handling device 1 is made of, for example, a thin metal plate or a flat plate made of a resin material such as plastic, and has two hand portions 3 which are bifurcated on the same plane. And three conical support pieces 4 are provided on the transport hand 2.
The three conical support pieces 4 arranged on the same plane are firstly arranged one by one near the tip of each hand section 3, and furthermore, the transfer hand 2 where the two hand sections 3 are separated. The remaining one support piece 4 is arranged on the center line of the branching part, and is positioned on the same plane of the transfer hand 2 so that these three conical support pieces 4 are located exactly at the vertices of an equilateral triangle. Are located in

The support cone 4 having such three conical shapes is used.
Are arranged at three points on the same plane of the transport hand 2 so as to be located at the vertices of an equilateral triangle, respectively, and the magnetic recording medium 10 is supported at three points.
However, the transfer hand 2 operates at high speed in both the vertical and horizontal directions because the three conical support pieces 4 arranged at the vertices of the equilateral triangle are supported favorably horizontally without rattling. However, the mechanism can stably hold the magnetic recording medium 10 in a horizontal state.

The actual transfer of the magnetic recording medium 10 between the transport hand 2 and the spindle, which is the inspection index 12, in the handling apparatus of the magnetic transfer apparatus of the present invention configured as described above will be described below. Has been done by

As shown in FIG. 5, when taking out the magnetic recording medium 10 from the inspection index 12, first,
As shown in FIG. 5A, the support piece 4 on the Y-shaped transfer hand 2 of the handling device 1 is positioned below the magnetic recording medium 10 held on the inspection index 12 as shown in FIG. At this time, although not shown in the drawing, the remaining support pieces 4 are also positioned at the same height on the center line. Next, as shown in FIG. 5B, the chuck 14 of the inspection index 12 is loosened and turned off. By turning off the chuck 14 of the inspection index 12 in this manner, the chuck 14 of the inspection index 12 is loosened in a direction in which the chuck 14 of the inspection index 12 contracts in the radial direction, moves away from the center hole of the magnetic recording medium 10, and the magnetic recording medium 10 is moved. You will be free. As shown in FIG. 5B, in a state where the chuck 14 of the inspection index 12 is separated from the magnetic recording medium 10 and the magnetic recording medium 10 is free, as shown in FIG. 2 is raised as indicated by the arrow, whereby the outer peripheral end surface of the magnetic recording medium 10 is brought into point contact with the conical surface of the support piece 4, and the magnetic recording medium 10 is scooped by the three support pieces 4 on the transport hand 2. Support it by raising it. As a result, the magnetic recording medium 10 is moved from the chuck 14 of the inspection index 12 to the transfer hand 2 of the handling device 1.
The magnetic recording medium 10 and the three support pieces 4 can be brought into contact with each other without any impact, and the impact at the time of contact can be minimized. Therefore, the ascending speed of the transport hand 2 can be set to the minimum speed at which the predetermined throughput of the magnetic transfer device can be secured.

When the magnetic recording medium 10 is supplied to the inspection index 12, the operation described above is performed in reverse to move the magnetic recording medium 10 to the inspection index 12.
To perform magnetic transfer.

Further, since the support top 4 comes into contact with the magnetic recording medium 10 at the same contact point many times, it is necessary to maintain good point contact at all times,
A similar material such as a resin material having a certain degree of softness or a hard rubber can be used in order not to cause a contact flaw.

In the magnetic transfer apparatus of the present invention, the handling device 1 does not apply any extra force or stress to the magnetic recording medium 10 from the outside.
The three support pieces 4 arranged on the same plane of the transport hand 2 come into contact with the magnetic recording medium 10 with a minimum contact area with respect to the outer peripheral end face of the magnetic recording medium 10, and stably without rattling. The magnetic recording medium 1 is held horizontally, and the magnetic recording medium 10 is placed horizontally on the transport hand 2 using the weight of the magnetic recording medium 10.
0 and the magnetic recording medium 1
0, and furthermore, three conical supporting members which can be supported as a point contact in order to minimize the contact with the magnetic recording medium 10 by directly supporting the magnetic recording medium 10. 4 are used to contact the magnetic recording medium 10 at one point on the conical surface of the support top 4. Regarding the stability of the magnetic recording medium 10 in the horizontal direction, the support pieces 4 are arranged on the transport hand 2 so as to be positioned at the vertices of an equilateral triangle in accordance with the outer diameter of the magnetic recording medium 10. As a result, the stability can be improved, and the magnetic recording medium 10 can be favorably positioned on the support top 4 and stably supported horizontally without rattling.

[0026]

As described above, according to the present invention,
The magnetic transfer device according to claim 1, wherein the magnetic transfer master disk is written in a pattern of a soft magnetic material on the surface of the magnetic transfer master disk by applying a magnetic field from the outside while keeping the magnetic transfer master disk in close contact with the magnetic recording medium. In a magnetic transfer device that magnetically transfers servo information to a magnetic recording layer on the surface of the magnetic recording medium, a foreign matter inspection unit that detects abnormal protrusions and foreign matter on the surface of the magnetic recording medium before magnetic transfer. Since it has handling means for holding the magnetic recording medium horizontally and stably, it does not apply extra force to the magnetic recording medium, and does not attach any scratches or dirt to the magnetic recording medium. Can be stably held horizontally and can be supported horizontally without rattling.

The magnetic transfer device according to the second aspect of the present invention is
Since the handling means has a transfer hand and three support pieces arranged on the same plane of the transfer hand, the center of the magnetic recording medium is accurately centered by the support pieces on the transfer hand, and good stability is achieved. It can be supported horizontally without rattling.

According to a third aspect of the present invention, there is provided a magnetic transfer apparatus comprising:
Since the transport hand has a bifurcated hand portion and the support pieces are arranged so as to be positioned at the vertices of an equilateral triangle, the magnetic recording medium is accurately centered by the three support pieces. , And can be stably and suitably supported without rattling.

According to the magnetic transfer apparatus of the present invention,
Since the support piece has a conical shape, the magnetic recording medium can be favorably supported without rattling.

The magnetic transfer device according to claim 5 of the present invention provides
Since the support piece is made of a resin material or a hard rubber material, it can be mass-produced simply, easily and inexpensively.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional view of a magnetic transfer apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view of a transport hand of the handling device in the first embodiment of the magnetic transfer device of the present invention.

FIG. 3 is a plan view in which a magnetic recording medium is placed on the transport hand of FIG. 2;

FIG. 4 is a perspective view of FIG. 3;

5A and 5B are schematic cross-sectional views showing an operation of transferring a magnetic recording medium between a transport hand and an inspection index in the handling device of the magnetic transfer apparatus of the present invention, and FIG. 5A illustrates a state where the inspection index holds the magnetic recording medium. Figure showing
(B) is a diagram showing a state where the chuck of the inspection index is loosened and turned off, and (c) is a diagram showing a state where the inspection index is separated from the magnetic recording medium and held by the transport hand.

FIG. 6 is a plan view for explaining a conventional example.

FIG. 7 is a vertical sectional view of the conventional example of FIG.

[Description of Signs] 1 Handling device 2 Conveyance hand 3 Hand unit 4 Support frame 10 Magnetic recording medium 12 Inspection index 14 Chuck 100 Magnetic recording medium 101 Hand 102 Hand arm unit 103 Claw 104 Groove

Continued on the front page (72) Inventor Eiichi Fujisawa 1-1-1, Tanabe Nitta, Kawasaki-ku, Kawasaki, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (72) Inventor Hiroshi Hashida 1-1-1, Tanabe Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa F term in Fuji Electric Co., Ltd. (reference) 3F061 AA01 BE01 DB04

Claims (5)

[Claims] 1. A servo information written in a pattern of a soft magnetic material on a surface of a magnetic transfer master disk by applying a magnetic field from the outside while the magnetic transfer master disk is in close contact with a magnetic recording medium. ,
In a magnetic transfer device for magnetically transferring the magnetic recording medium to a magnetic recording layer on the surface of the magnetic recording medium, a foreign substance inspection unit for detecting abnormal protrusions and foreign substances on the surface of the magnetic recording medium before magnetic transfer transfers the magnetic recording medium. A magnetic transfer device comprising a handling means for stably holding horizontally. 2. The magnetic transfer apparatus according to claim 1, wherein the handling unit has a transfer hand and three support pieces arranged on the same plane of the transfer hand. 3. The magnetic transfer apparatus according to claim 2, wherein the transfer hand has a bifurcated hand portion, and the support piece is disposed so as to be located at a vertex of an equilateral triangle. . 4. The magnetic transfer apparatus according to claim 3, wherein said support piece has a conical shape. 5. The magnetic transfer apparatus according to claim 4, wherein said support piece is made of a resin material or a hard rubber material.