JP2002367161A - Transfer disk, disk contact device, magnetic transfer device using the same, method of manufacturing disk to be transferred and magnetic recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the variation in the transfer conditions of a disk to be transferred, such as a disk of a small diameter and a disk having not central hole, to avoid the complication of the constitution thereof and to permit good magnetic transfer with the disk to be transferred. SOLUTION: The transfer disk 1 which has a disk surface for magnetically transferring information and the disk 2 to be transferred which has a disk surface to be magnetically transferred with the information are stacked by disposing their each other's disk surfaces opposite to each other on a disk installation table 3. The gas existing between both the disk surfaces facing each other on this stacked state is exhausted from the inner peripheral side to the outer peripheral side by an exhaust mechanism 8 connected to an air exit 3d and a negative pressure with respect to the atmosphere pressure is generated between both the disk surfaces by this exhaust, by which both the disks are brought into tight contact with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer disk, a disk contact device, a magnetic transfer device using the same, a method for manufacturing a transferred disk, and a magnetic recording / reproducing device.

[0002]

2. Description of the Related Art In magnetically transferring information from a transfer plate on which magnetic information is recorded and used for magnetic transfer of the information to a transfer plate as a recording medium for magnetic transfer, It is necessary to bring the two disks into close contact in order to perform good magnetic transfer.

One of the prior arts for this purpose is disclosed in Japanese Patent Application No. 9-7 / 1997.
No. 5703.

Hereinafter, a description will be given with reference to FIG.
0 is a transfer board, 101 is a transfer board, 102 and 104 are board installation tables, 105 is a permanent magnet, and 106 is an elastic plate.

[0005] Further, 107 is an exhaust device, 108 is a three-way valve, 109 is an exhaust duct, and 110 is the panel mounts 102, 1
04 is a bolt for fixing.

The transfer plate 100 uses the atmospheric pressure by means of an exhaust duct 109, a three-way valve 108 and an exhaust device 107, between a magnetic transfer surface on which information is formed in an uneven shape and a magnetic transfer surface of the transferred plate 101. So that they adhere evenly.

[0007]

In the case of the above-mentioned prior art, since the exhaust duct 109 is arranged at the center of the apparatus, the exhaust conductance at the center of the transfer plate 100 is large. Therefore, the transfer plate 100 may be deformed by being sucked into the central hole 101a of the transfer plate 101, and the adhesion of the transfer plate 100 to the transfer plate 101 at the outer peripheral portion may be deteriorated.

For this reason, the board mounting table 102 and the transfer board 100
The elastic plates 106 are respectively provided between the board mounting table 104 and the transfer receiving board 101.
2 and 104 are connected using bolts 110 and bolts 79
The two substrates 100 and 101 are mechanically pressed against each other by tightening and tightening to obtain the close contact.

However, in such a conventional technique,
It is not suitable for a magnetic transfer device for a transfer plate having a small diameter or a transfer plate having no center hole.
Due to the pressure contact by 10, the transfer condition has a large variation and the configuration is complicated.

Therefore, the present invention suppresses variations in transfer conditions for a small-diameter transfer plate or a transfer plate having no center hole, does not require a complicated structure, and is suitable for good magnetic transfer. Is a common issue to be solved.

[0011]

Means for Solving the Problems (1) The transfer disk of the present invention is:
A transfer disk having information to be magnetically transferred to a transfer target plate by application of a magnetic field, and a state in which information can be magnetically transferred to the transfer target plate by application of a magnetic field on the inner peripheral side of the disk surface. And a discharge area for exhausting gas between the opposing board surfaces of the two boards from the inner peripheral side toward the outer peripheral side.

According to the present invention, since an exhaust area for exhausting the gas between the disk surfaces from the inner peripheral side to the outer peripheral side is provided, it is necessary to arrange an exhaust duct for the exhaust at the center of the magnetic transfer apparatus. As a result, the exhaust conductance in the central region of the transfer plate can be reduced, the deformation of the transfer plate during the exhaustion can be suppressed, and the adhesion of the outer peripheral portion to the transfer plate can be improved. Therefore, it is possible to suppress variations in transfer conditions for a small-diameter transfer target plate or a transfer target plate having no center hole, and to achieve good adhesion between the two plates without complicating the configuration. .

[0013] The exhaust area of the transfer disk preferably comprises a recess.

Further, preferably, a sealing area for sealing the exhaust area is provided on the board surface on the outer peripheral side of the exhaust area.

Further, preferably, the transfer area comprises a plurality of transfer areas extending radially from the center of the board,
One side of the exhaust area is located between the radial transfer areas, and the other side surrounds the outer peripheral side of each radial transfer area.

(2) The board contact device of the present invention is a board contact device for bringing a transfer plate having a board surface on which information is magnetically transferred and a transfer board having a board surface on which information is magnetically transferred into close contact with each other. An apparatus, wherein the two boards are stacked with their respective board faces facing each other, and gas present between the opposed two board faces in this stacked state is exhausted from the inner peripheral side to the outer peripheral side, and the exhausted gas is used for both the board faces. It is characterized in that both panels are brought into close contact with each other with a negative pressure with respect to the atmospheric pressure.

According to the present invention, the two boards are stacked with their board faces facing each other, and the gas existing between the opposed board faces in the stacked state is exhausted from the inner peripheral side to the outer peripheral side. Since the pressure between the two surfaces is a negative pressure with respect to the atmospheric pressure, first, it is not necessary to arrange an exhaust duct for exhausting the gas between the surfaces from the inner peripheral side to the outer peripheral side at the center of the magnetic transfer device, and the transfer is performed. The exhaust conductance in the central region of the disk can be reduced, the deformation of the transfer disk during the exhaustion can be suppressed, and the adhesion of the transfer disk to the transfer disk at the outer peripheral portion can be improved. Therefore, it is possible to suppress variations in transfer conditions for a small-diameter transfer target plate or a transfer target plate having no center hole, and to achieve good adhesion between the two plates without complicating the configuration. .

In the present invention, preferably, a board mounting table on which the both boards can be stacked and installed, and the board mounting table has an exhaust port for gas present between the two stacked boards. It is provided on the outer peripheral side.

In this case, it becomes easy to attach an exhaust mechanism for exhausting the inside of the board installation table to the exhaust port.

In a preferred embodiment of the present invention, the board mounting table is constituted by a concave portion having a depth on the bottom surface of the board mounting plate, and an end of an annular wall surrounding the concave portion. And a transfer plate supporting portion for supporting the transfer plate, and the transfer plate accommodated in the recess is sealed with a transfer plate supported by the transfer plate support portion. ing.

In this case, a transfer receiving plate is placed on the bottom surface of the concave portion of the board mounting table, and the transfer plate is stacked thereon, and the transfer receiving plate can be sealed with the transfer plate. can do. In addition, since the transfer board itself seals the inside of the board installation table, the atmospheric pressure can be used effectively, and both boards can be securely adhered to each other with little variation in transfer conditions. It is not necessary to reduce the exhaust resistance as well as to reduce the exhaust resistance, so that the two boards can be brought into close contact with each other at an early stage from the start of the exhaust, and it is necessary to apply a magnetic field to the transfer board and transfer it to the transfer board. The time is shortened, and the productivity of the transfer receiving plate can be improved. In addition, since the transfer plate is sealed with the transfer plate, the above-described operation and effect can be exhibited, and transfer to a small-diameter transfer plate or a transfer plate having no center hole can be performed.

In a preferred embodiment of the present invention, an elastic body is disposed on the bottom surface of the concave portion of the board mounting table, and the transferred board is supported by the transfer board support by the elastic action of the elastic body. Of the board.

In this case, it is preferable that the two plates can be brought into close contact with each other by the elastic action of the elastic body even if the accuracy of the mounting surface between the transfer plate and its supporting portion is low.

In a preferred embodiment of the present invention, the elastic body has a disk shape and has a through hole in a central region thereof.

In this case, it is preferable that both boards can be securely and satisfactorily brought into close contact by the elastic action of the elastic body.

[0026] In the present invention, it is further preferable that the board mounting table has a shaft insertion hole into the center area of the bottom surface of the concave portion, in which the shaft can be inserted in the transfer plate with the shaft.

In this case, it is preferable that magnetic transfer can be performed from the transfer plate to a transfer plate having a shaft.

[0028] More preferably, before the two boards are installed on the board installation table and the inside of the recess is evacuated, the two boards are brought into non-contact with each other. Are brought into contact with each other.

In this case, the two boards are in a non-contact state before the start of the evacuation, and the two boards come into contact after the start of the evacuation. This is preferable because the magnetic transfer can be surely performed by closely contacting in a state.

In a preferred embodiment of the present invention, the board mounting table has a first through-hole penetrating inward and outward in a central area of the bottom surface of the concave portion, and a transfer board is stacked on the transfer-receiving board. The central region of the transfer receiving plate can be maintained at the atmospheric pressure when the pressure between the opposing plate surfaces of both plates is reduced.

In this case, when magnetic transfer is performed on a transfer receiving plate having a center hole, there is no possibility that the transfer plate will be deformed even if the transfer plate is subjected to a depressurizing action between both surfaces, so that reliable and good magnetic transfer can be achieved. It is possible and preferable.

In the present invention, more preferably, an exhaust mechanism for exhausting the inside of the board installation table is provided to an exhaust port of the board installation table.

In this case, the air can be exhausted so that both surfaces are in close contact with each other without preparing an exhaust mechanism separately.

(3) The first and second magnetic transfer devices according to the present invention include the transfer plate of (1), the plate contact device of (2), and a magnetic field applying device for applying a magnetic field to the transfer plate. The second magnetic transfer apparatus of the present invention further includes an exhaust mechanism for exhausting the inside of the board contact device, and stacks the two boards so that their board faces each other with respect to the board contact device. By exhausting the gas existing between the opposing disc surfaces in the stacked state from the inner peripheral side to the outer peripheral side by the exhaust mechanism, both the discs are brought into close contact with each other, and a magnetic field is applied to the transfer disc by the magnetic field applying mechanism. The information is magnetically transferred to the transfer-receiving plate.

According to the first and second magnetic transfer apparatuses of the present invention, variations in transfer conditions are suppressed for a small-diameter transfer plate or a transfer plate having no center hole, and the configuration is not complicated. In addition, the two boards are in close contact with each other and suitable for good magnetic transfer.

(4) The method of manufacturing a transfer receiving plate according to the present invention is characterized in that
The transfer plate of the above (1) is stacked on the magnetic transfer device of the above (3) together with the transfer target plate to be magnetically transferred, and the surfaces of the both plates are brought into close contact by exhausting gas present on the opposed plate surfaces of the both plates. Then, information is magnetically transferred from the transfer plate to the transfer target plate by the magnetic field applying mechanism in the close contact state to manufacture a transfer target plate on which information is recorded.

According to the present invention, variations in transfer conditions are suppressed for a small-diameter transfer plate or a transfer plate having no center hole, and the two plates are closely contacted and magnetically transferred under good conditions. Board can be manufactured.

(5) The magnetic recording and reproducing apparatus of the present invention
The transfer disk manufactured by the method for manufacturing a transfer disk according to (4) is used as a hard disk.

According to the present invention, the transfer-receiving plate on which information is magnetically transferred from the transfer disk accurately and reliably is used as a hard disk, so that the hard disk can be controlled well to perform magnetic recording and reproduction.

[0040]

Embodiments of the present invention will be described below with reference to the drawings.

First, a magnetic transfer device according to an embodiment of the present invention will be described with reference to FIGS.

Referring to FIG. 1, reference numeral 1 denotes a transfer board for magnetically transferring information, 2 denotes a transfer board such as a hard disk to which information is magnetically transferred from transfer board 1, 3 denotes a board mounting table, and 4 denotes a board mounting table. ,
Permanent magnet whose magnetization direction is toward the front of the paper.
Is an exhaust duct, 7 is a three-way valve, and 8 is an exhaust device.

The transfer disk 1 has a disk surface for magnetically transferring information, which will be described later in detail with reference to FIGS.

The transfer disk 2 has a disk surface on which information is magnetically transferred from the transfer disk 1, and is composed of, for example, a transfer disk.

The board mounting table 3 is capable of stacking the two boards 1 and 2, and has a concave portion 3a having a depth at which the transfer plate 2 can be installed on the bottom surface thereof, and the concave portion 3a.
a transfer plate 1 which is constituted by the end of an annular wall 3b surrounding the periphery of
The two plates 1 and 2 are installed in such a state that the transfer plate 2 accommodated in the recess 3a is sealed by the transfer plate 1 supported by the support portion 3b. Things. The board mounting table 3 has an exhaust port 3c that penetrates inward and outward on the outer peripheral side of the concave portion 3a.

The permanent magnet 4 serves as a magnetic field applying means for exciting a magnetic thin film formed on the transfer plate 1 to apply a magnetic field.

The pipe joint 5, the exhaust duct 6, the three-way valve 7, and the exhaust device 8 serve as an exhaust mechanism as an example of a contact mechanism, and exhaust the inside of the concave portion 3a of the board installation base 3 to bring both the boards 1 and 2 into close contact. Things.

It should be noted that the board mounting device is constituted by the board mounting table 3 and the close contact mechanism.

Next, as will be described with reference to FIG. 2, the transfer disk 1 is formed on the inner peripheral side of one of the surfaces of the transfer disk 1 with concavities and convexities corresponding to the transfer information, and is formed in a circumferential direction with respect to each other. A plurality of concavo-convex areas (transfer areas) 1a (radially drawn in the drawing) adjacent to each other and radially extending in the radial direction, and a plurality of concave areas (exhaust areas) located between the transfer areas 1a in the circumferential direction. 1b (shown in black in the figure) and an annular flat area (sealed area) 1c (shown in white in the figure) on the outer peripheral side of the transfer surface.

The exhaust regions 1b will be described in more detail. The exhaust regions 1b are located between the transfer regions 1a, that is, the individual radial exhaust regions 1b1 located on the inner peripheral side, and the exhaust regions 1b located on the outer peripheral side of the transfer region 1a. Annular exhaust areas 1b
The area can be divided into two. Each radial exhaust area 1b1 is connected to the annular exhaust area 1b2.

The sealed area 1c is provided in the annular exhaust area 1b2.
It is located on the outer peripheral side more and surrounds the entire circumference of the annular exhaust region 1b2.

As will be described with reference to FIG. 3, the transfer area 1a is formed by combining concave and convex portions on the board surface in accordance with the information pattern, and the convex portion is formed on the surface. A ferromagnetic thin film is formed, and is indicated by hatching.

The transfer area 1a includes a first transfer area for data recording for transferring an area for data recording and a second transfer area for transferring a servo signal for tracking in the track length direction. A transfer area; and a third transfer area for transferring an address information signal including a reproduction clock signal.

The tracking servo signal, address information signal, reproduction clock signal, and the like are reference signals for the magnetic head in the magnetic recording / reproducing apparatus to accurately scan a narrow track and reproduce the signal with good S / N. This is used for tracking servo of a head, and is provided at a constant angular interval in one round of the disk, that is, within 360 degrees in angle. The magnetic head in the magnetic recording / reproducing apparatus reproduces these signals at regular intervals, so that the track can be accurately scanned while confirming and correcting the position of the head.

The magnetic transfer by the magnetic transfer device having the above configuration will be described.

First, as shown in FIG. 4, the transfer receiving plate 2 is initially magnetized in a circumferential direction and a fixed direction by using a permanent magnet 4a. Here, a symbol in which an X mark is arranged at the center of the white circle of the permanent magnet 4a indicates the magnetization direction, and indicates that the magnetization direction is from the front to the back of the paper.

Next, as shown in FIG. 1, the transfer-receiving plate 2 and the transfer plate 1 are stacked on the plate-mounting table 3. At this time, the sealed area 1c of the transfer board 1 and the transfer board support portion 3c of the board setting table 3 abut against each other, and the inside of the board setting table 3 is sealed at a portion other than the exhaust duct 6.

In this state, the three-way valve 7 is operated to switch the exhaust duct 6 from the open side to the exhaust device 8 side. Then, the space between the transfer receiving plate 2 and the transfer plate 1 is evacuated by the exhaust device 8. At this time, the exhaust duct 6 is connected outside the outer peripheral end of the transfer plate 2, and the gas in the radial exhaust region 1 b provided on the transfer plate 1 flows toward the outer peripheral side of the transfer plate 2. The transfer plate 1 is evacuated, and is attracted to the transfer plate 2 mainly by the atmospheric pressure applied to the upper portion of the transfer plate 1, so that the two plates 1 and 2 come into close contact with each other.

Next, as shown in FIG. 5, the permanent magnet 4 is turned around the central axis of the transfer plate 2 in parallel with the transfer plate 1 to apply a DC exciting magnetic field (in the direction of arrow H in the figure). As a result, the ferromagnetic thin film formed on the surface of the projection of the transfer area 1a of the transfer disk 1 is magnetized, and an information signal corresponding to the signal pattern is recorded on the transfer target disk 2.

As described above, the sealed area 1c of the transfer plate 1
By making the inside of the board setting table 3 hermetically sealed by using the above, it is possible to effectively utilize the atmospheric pressure applied to the transfer board 1 to make close contact.

Further, as compared with the conventional method of press-contacting with an elastic body and a bolt shown in FIG. 15, variations in transfer conditions can be made extremely small, and as a result, a high-quality transfer plate 2 can be manufactured. It is possible.

Since the transfer board 1 itself seals the inside of the board setting table 3, the atmospheric pressure can be used effectively, and a magnetic transfer apparatus can be realized with a relatively simple structure. . Furthermore, since the cross-sectional area of the open end of the exhaust region 1b can be larger on the outer peripheral side than on the inner peripheral side, the exhaust resistance is low and it is necessary to obtain sufficient adhesion from the start of exhaust compared to the conventional example. In addition, the effect that less time is required can be obtained.

In the case of the above-described embodiment, the following modifications are conceivable. (1) For example, when a transfer target disk is used for a hard disk as in a disk drive, a reference signal is first recorded on a magnetic film of the hard disk, and preformat recording such as a servo signal for tracking is performed based on the reference signal. In the case of performing, by using the transfer disk of the present embodiment, only a reference signal used for preformat recording is transferred and recorded in advance on a magnetic film of a transfer target disk for a hard disk,
Then, the hard disk may be incorporated in a housing of the drive, and preformat recording such as a servo signal for tracking may be performed using a magnetic head of the disk drive.

(2) As the above-mentioned ferromagnetic thin film, many types of magnetic materials can be used regardless of hard magnetic materials, semi-hard magnetic materials, and soft magnetic materials. Any material that can transfer and record signals, such as Fe, Co, and Fe-Co, may be used.
An alloy or the like can be used.

(3) In order to generate a sufficient recording magnetic field irrespective of the type of magnetic recording medium on which information is recorded, it is generally better to increase the saturation magnetic flux density of the magnetic material. In particular, for a magnetic disk having a high coercive force exceeding 2000 Oe or a flexible disk having a large magnetic layer thickness, if the saturation magnetic flux density is 0.8 Tesla or less, sufficient recording may not be performed. Specifically, a magnetic material having a saturation magnetic flux density of 0.8 Tesla or more, preferably 1.0 Tesla or more is used.

(4) The thickness of the ferromagnetic thin film depends on the bit length, the saturation magnetization and the thickness of the magnetic layer.
m, the saturation magnetization is about 500 emu / cc, and the thickness of the magnetic layer is about 20 nm, the thickness may be about 50 nm to 500 nm.

(5) In the above embodiment, the sealed area 1
Although c is the same height as the transfer area 1a, as shown in another example of the transfer board 1 shown in FIG. 6, a configuration in which a sealed area 1c having the same height as the recess other than the transfer area 1a may be provided. The height of the sealing area is not particularly limited to the above.

(6) Although the transfer disk is magnetized by using the permanent magnet 4, it is not particularly limited as long as it is generally known as a means for applying a magnetic field. A ring-type head combining a magnet or an electromagnetic coil and a magnetic yoke, the electromagnetic coil itself, or the like may be used.

(7) As the material of the panel mounting base 3, it is preferable to use a non-magnetic material such as brass steel or non-magnetic stainless steel so that the magnetic field from the permanent magnet is not disturbed. As described above, by using the present embodiment, highly reliable preformat recording can be performed in a short time on a hard disk, a floppy (registered trademark) disk, or the like.

(8) With respect to the above-described embodiment, as shown in FIG. 7, an elastic plate 9 may be stacked between the board mounting table 3 and the transfer board 2.

With this stack configuration, it is possible to reduce the influence of the surface accuracy of the upper surface of the board mounting table 3 or the lower surface of the transfer board 2 on the close contact between the transfer board 1 and the transfer board 2.

Here, as the material of the elastic plate 9, silicon rubber, viton rubber or the like can be used, but any material having elasticity may be used. Also, instead of the elastic plate 9, an O-ring or the like can be used as the elastic body similarly to the elastic plate 9.

(9) As compared with the above-described embodiment, as shown in FIG. 8, even if the transfer receiving plate 2 does not have the center hole, good magnetic transfer recording can be realized.

(10) In contrast to the above-described embodiment, an elastic plate 9 may be stacked between the board mounting table 3 and the transfer board 2 as shown in FIG.

(11) In contrast to the above embodiment, as shown in FIG. 10, the transfer receiving plate 2 may have a rotating shaft 2a. Corresponding to this, the shaft 2
A shaft insertion hole 3e into which a is inserted is provided.

The shaft portion 2a of the transfer disk 2 for a hard disk forms a bearing by fitting with a sleeve member (not shown) when mounted on a disk drive. Good magnetic transfer recording can also be achieved on the shaft-integrated transfer plate 2.

(12) In contrast to the above embodiment, FIG.
As shown in (a) and (b), by attaching an elastic body, preferably an O-ring 10, to the panel mounting table 3, before the gas inside the panel mounting table 3 is exhausted, the O-ring 10 rebounds. The transfer plate 1 and the transfer receiving plate 2 may be kept in a non-contact state with a certain gap by force.

FIG. 11A shows a state in which the exhaust duct 6 is open to the atmospheric pressure. FIG. 11 (a)
In this state, the three-way valve 7 is operated, and the gas inside the board installation base 3 is exhausted from the exhaust port 3d of the board installation base 3 to the outside by the exhaust device 8. When the inside of the board installation table 3 is decompressed by the exhaust, the transfer board 1 and the transfer board 2 come into contact with each other by the elastic deformation of the O-ring 10 as shown in FIG. 11B.

Thereafter, the gas remaining between the opposing surface of the transfer plate 1 and the transfer receiving plate 2 is further evacuated through the exhaust region 1b of the transfer plate 1, and uniform contact is obtained. By doing so, even if there is a thickness variation or the like of the transfer receiving plate 2,
Good adhesion is always obtained.

Although the O-ring 10 is used here, the O-ring 10 may be used without using the O-ring 10 to make close contact using only the elastic deformation of the transfer plate.

(13) In contrast to the above embodiment, FIG.
13 and FIG. 13 is that a through-hole 3f is provided in the board installation base 3. In FIG. 12, a through hole 3f is provided, and in FIG. 13, a through hole 3f is not provided.
Each of the transfer receiving plates 2 has a center hole 2a.

The presence or absence of such a through hole 3f determines whether the transfer plate 1
The difference that occurs in the state of close contact between the substrate and the transfer receiving plate 2 will be described.

FIG. 13 is a diagram showing a state of close contact when the through-hole 3b is not provided in the board mounting table 3 with the deformation state of the transfer board 1 emphasized. When the transfer receiving plate 2 having the center hole 2a is used as described above, since there is no support over a large area with respect to the central region of the transfer pressing plate 1, a depression occurs in the transfer pressing plate 1 due to the atmospheric pressure at the time of pressure reduction. Resulting in.

Due to the influence, it becomes difficult for the transfer plate 1 and the transfer receiving plate 2 to uniformly adhere to each other. On the other hand, in the configuration shown in FIG. 12, the through hole 3 f is provided in the board installation table 3, so that the vicinity of the center hole 2 a of the transfer board 2 is maintained at the atmospheric pressure, and the center area of the transfer board 1 is The transfer plate 1 and the transfer receiving plate 2 can be uniformly brought into close contact with each other over the entire surface without any depression.

Here, the through-hole 3f is provided in the board installation table 3 in order to open the inner peripheral side of the transfer-receiving board 2 to the atmospheric pressure. However, a configuration in which a through-hole is provided in the transfer board 1 may be used. The effect is obtained.

(14) As shown in FIG. 14, a magnetic recording / reproducing apparatus is obtained in which the transfer target disk manufactured by the magnetic transfer apparatus of the present embodiment is mounted as a hard disk as an example of the magnetic recording / reproducing apparatus.

In the figure, 20 is a recording / reproducing head, 21 is a suspension, 22 is an arm, 23 is a pivot bearing,
4 is a voice coil, 25 is a housing, and 2 is a hard disk.

Here, the hard disk 2 is preformatted by magnetic transfer in the method described in the present embodiment. As described above, according to the magnetic transfer apparatus of the present embodiment, it is possible to manufacture a hard disk suitable for such an ultra-small magnetic recording / reproducing apparatus, that is, to realize a high-performance hard disk drive at low cost. It is.

(15) The present invention is not limited to a circular and hard transfer disk such as a hard disk, but may have any hardness or shape such as a rectangular transfer disk or a flexible transfer disk.

[0090]

As described above, according to the present invention, variation in transfer conditions is suppressed for a small-diameter transfer plate or a transfer plate having no center hole, and the structure is not complicated. In addition, the two discs come into close contact with each other and are suitable for good magnetic transfer.

More specifically, the present invention is also applicable to a transfer disk without a small diameter or a center hole by exhausting gas existing between the transfer disk and the transfer disk from the outer peripheral side. Highly reliable preformat recording can be realized.

Further, as compared with a method in which both boards are pressed against each other by an elastic body and a bolt, the variation in the transfer conditions can be made extremely small, and as a result, a high-quality transfer board can be manufactured.

Furthermore, since the inside of the board mounting table is hermetically closed by the transfer board itself, the atmospheric pressure can be used effectively, and a relatively simple structure can be realized.

Further, since the cross-sectional area of the open end of the exhaust area of the transfer plate can be larger on the outer peripheral side than on the inner peripheral side, the exhaust resistance is small and the close contact from the start of exhaust is sufficient as compared with the conventional example. There is also obtained an effect that the time required for obtaining is reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a magnetic transfer apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view of a transfer plate in the magnetic transfer device of FIG. 1;

FIG. 3 is an enlarged view of a broken line portion A in FIG. 2;

FIG. 4 is a diagram showing a state in which a DC erasing magnetic field is applied to a slave disk.

FIG. 5 is a diagram showing a state in which a DC excitation magnetic field is applied when magnetic transfer is performed from a transfer board to a transfer-receiving board;

FIG. 6 is a diagram showing another modification of the transfer receiving plate.

FIG. 7 is a side sectional view of a magnetic transfer apparatus according to another embodiment of the present invention.

FIG. 8 is a side sectional view of a magnetic transfer apparatus according to still another embodiment of the present invention.

FIG. 9 is a side sectional view of a magnetic transfer apparatus according to still another embodiment of the present invention.

FIG. 10 is a side sectional view of a magnetic transfer apparatus according to still another embodiment of the present invention.

FIG. 11 is a side sectional view of a magnetic transfer apparatus according to still another embodiment of the present invention.

FIG. 12 is a side sectional view of a magnetic transfer apparatus according to still another embodiment of the present invention.

FIG. 13 is a side sectional view of a magnetic transfer apparatus according to still another embodiment of the present invention.

FIG. 14 is a schematic diagram of a slave magnetic recording / reproducing apparatus in which the magnetic transfer apparatus according to the embodiment of the present invention is incorporated.

FIG. 15 is a side sectional view of a conventional magnetic transfer apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transfer board 2 Transfer receiving board 3 Board installation stand 4 Magnet 5 Fitting 6 Exhaust duct 7 Three-way valve 8 Exhaust device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideyuki Hashi 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (17)

[Claims] 1. A transfer disk provided with information to be magnetically transferred to a transferred disk by applying a magnetic field, wherein the information is magnetically transferred to the transferred disk by applying a magnetic field on an inner peripheral side of the disk surface. A transfer plate provided with a transfer region in a transferable state, and a discharge plate for discharging gas between opposed plate surfaces of the two plates from an inner peripheral side toward an outer peripheral side thereof; . 2. The transfer disk according to claim 1, wherein said exhaust area comprises a concave portion provided on a surface of said disk. 3. The transfer disc according to claim 1, further comprising a sealing area for sealing the exhaust area on the board surface on the outer peripheral side of the exhaust area. 4. The transfer board according to claim 1, wherein the transfer area comprises a plurality of transfer areas extending radially from the center of the board surface, and the exhaust area has one side located between the radial transfer areas. And the other side of the area surrounds the outer peripheral side of each radial transfer area. 5. A board contacting device for bringing a board in close contact with a transfer board having a board on which information is magnetically transferred and a transfer board having a board on which information is magnetically transferred. The stacks are stacked with the respective board faces facing each other, and the gas existing between the opposed board faces in this stacked state is exhausted from the inner peripheral side to the outer peripheral side. A board contact device, wherein the boards are brought into close contact with each other. 6. The board contacting device according to claim 5, wherein the board mounting base on which the two boards can be stacked and installed, and wherein the board mounting base exists between the two stacked boards. A panel contact device, comprising a gas exhaust port on an outer peripheral side thereof. 7. The board contacting device according to claim 6, wherein the board mounting table has a concave portion having a depth on a bottom surface thereof where a transfer target plate can be installed, and an end portion of an annular wall surrounding a periphery of the concave portion. A transfer plate supporting portion configured to support the transfer plate, and both plates are installed in a state where the transferred plate accommodated in the recess is sealed by the transfer plate supported by the transfer plate support portion. A board contact device, characterized in that it is configured to: 8. An apparatus according to claim 7, wherein an elastic body is arranged on a bottom surface of the concave portion of said board installation table, and said transfer board is supported by said transfer board support portion by an elastic action of said elastic body. A plate contacting device capable of abutting against the surface of the transferred transfer plate. 9. The board contact device according to claim 8, wherein said elastic body has a board shape and has a through hole in a central region thereof. 10. The board sticking device according to claim 7, wherein said board mounting base is configured to insert said shaft portion into a transfer plate having a shaft portion with respect to a center region of a bottom surface of said concave portion. A board contact device having a possible shaft insertion hole. 11. The apparatus according to claim 7, wherein before the two boards are installed on the board mounting table and the inside of the recess is evacuated, the two boards are not in contact with each other. A board contacting device, wherein both boards are brought into contact with each other by starting the exhaust. 12. The board adhesion device according to claim 7, wherein the board installation base has a first through hole penetrating inward and outward in a center area of the bottom surface of the recess, and a transfer board is provided on the transfer target board. A plate contact device, wherein the stacked regions are configured to be able to hold the central region of the transfer-receiving plate at atmospheric pressure when a pressure between the opposing plate surfaces of both plates is subjected to a decompression action. 13. The board contact device according to claim 6, wherein an exhaust mechanism for exhausting the inside of the board installation table is provided to an exhaust port of the board installation table. Characteristic board contact device. 14. The transfer plate according to claim 1, wherein the transfer device has a magnetic field applying mechanism for applying a magnetic field to the transfer plate. An exhaust mechanism for exhausting the inside of the board contact device, comprising: stacking the two boards with the respective board surfaces facing each other with respect to the board contact device, and removing the gas present between the opposed board surfaces in the stacked state. By exhausting air from the inner peripheral side to the outer peripheral side by an exhaust mechanism, both the disks are brought into close contact with each other, and a magnetic field is applied to the transfer disk by the magnetic field applying mechanism to magnetically transfer information to the transferred disk. A magnetic transfer device. 15. The transfer disk according to claim 1, further comprising: a disk contact device according to claim 13, and a magnetic field applying mechanism for applying a magnetic field to the transfer disk. The boards are stacked with the respective board surfaces facing each other with respect to the board contact device, and gas present between the opposed board faces in the stacked state is exhausted from the inner peripheral side to the outer peripheral side by the exhaust mechanism, thereby making the both sides. A magnetic transfer device configured to apply a magnetic field to the transfer disk by the magnetic field applying mechanism to magnetically transfer information to the transfer target disk while the disk is in close contact. 16. A magnetic transfer apparatus according to claim 14, together with a transfer-receiving plate to be magnetically transferred.
Or stacking the transfer discs according to any one of (4) to (4), and bringing the two disc faces into close contact by exhausting gas present on the opposing disc faces of the both discs; A method for manufacturing a transferred disk, comprising: manufacturing a transferred disk on which information is recorded by magnetically transferring information to the transferred disk. 17. A magnetic recording / reproducing apparatus using a transfer disk manufactured by the method for manufacturing a transfer disk according to claim 16 as a hard disk.