JP2006065899A - Magnetic transfer apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely hold a master carrier and a slave medium on one inner surface of a transfer holder by reducing a gap for a sucking plane. <P>SOLUTION: Master carriers 3, 4 having a transfer pattern corresponding to transfer information are held by the transfer holder 1, when a slave medium 2 having a magnetic recording part receiving transfer is adhered closely to the master carriers 3, 4 and magnetic transfer is performed, the transfer holder 1 is provided with the inner surface holding the master carriers 3, 4, and a slave absorbing plane 8a sucking a part of the slave medium 2 projected to the approximately same height as the surface of the master carriers and overlapped on the master carriers, and the holder 1 has such structure that the slave sucking plane 8a is movable in the vertical direction to the surface of the master carriers 3, 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a magnetic transfer apparatus for magnetic transfer from a master carrier carrying information to a slave medium, and more particularly to a structure of a transfer holder for holding and closely contacting the master carrier and the slave medium.

  The magnetic transfer that is the subject of the present invention includes a master carrier (patterned master) in which a transfer pattern such as a servo signal having a magnetic layer at least on the surface layer is formed in an uneven shape or an embedded structure, and a slave medium having a magnetic recording unit. In a state of being in close contact, a magnetic field for transfer is applied to transfer and record a magnetization pattern corresponding to information carried on the master carrier onto the slave medium.

  When the slave medium is a disk-shaped medium such as a hard disk or a high-density flexible disk, an electromagnet device or permanent magnet is attached to one or both sides of a disk-shaped master carrier in close contact with one or both surfaces of the slave medium. A magnetic field applying device using a magnet device is provided to apply a transfer magnetic field.

When performing the magnetic transfer, it is preferable to use a transfer holder that holds and presses the master carrier and the slave medium so that the master carrier and the slave medium are in close contact with each other. Also, during magnetic transfer, the transfer holder needs to hold the master carrier on its inner pressing surface and the slave medium, and the holder has a step approximately the same height as the thickness of the master carrier. It has been proposed that a suction hole is provided in this portion to hold the slave medium by suction (see, for example, Patent Document 1).
JP 2003-242638 A

  By the way, in the case where the master carrier is held on the transfer holder in the magnetic transfer device and a part of the slave medium is attracted and held on the master carrier, the thickness variation of the master carrier and the processing accuracy variation of the step are reduced. Considering this, the step for adsorbing and holding the slave medium needs to be lower than the thickness of the master carrier.

  In other words, if the height of the step having the slave suction surface protrudes higher than the thickness of the master carrier, when the transfer holder is closed and the slave medium and the master carrier are brought into close contact, the slave medium is mastered around the slave suction surface. It floats up from the carrier, and good adhesion cannot be obtained. If there is poor adhesion, there will be areas where magnetic transfer will not occur, and if magnetic transfer does not occur, signal loss will occur in the magnetic information transferred to the slave medium and the signal quality will deteriorate, and the recorded signal will be a servo signal. However, there is a problem that the tracking function cannot be sufficiently obtained and the reliability is lowered. In addition, damage to the slave medium due to strong contact with the slave attracting surface, and contamination due to the accompanying dust become a problem.

  However, if the suction surface of the step is made lower than the thickness of the master carrier, a gap is generated between the slave medium and the slave suction surface, and suction air leaks when the slave medium is sucked, resulting in insufficient suction of the slave medium. There is a risk that the slave medium may be misaligned or the slave medium may fall during the magnetic transfer process.

  Furthermore, in order to improve the adhesion between the master carrier and the slave medium, there is a case where a cushioning material that is elastically deformed is interposed between the back surface of the master carrier and the holder surface. In this case, it is necessary to set the height of the step having the slave suction surface to be low in consideration of the compression deformation of the buffer material and the thickness variation of the buffer material. Therefore, when the slave medium is adsorbed in a state before pressurization, there is a problem that the gap between the slave adsorption surface and the slave medium is further increased, leakage increases, and the adsorption becomes unstable.

  The present invention has been made in view of the above points, and with respect to holding the master carrier and the slave medium in an overlapping manner on the transfer holder, the gap between the slave suction surface and the slave medium can be reduced and the slave medium can be reliably held. It is an object of the present invention to provide a magnetic transfer apparatus.

The magnetic transfer apparatus of the present invention holds a master carrier having a transfer pattern corresponding to transfer information on a transfer holder, and applies a magnetic field for transfer by bringing a slave medium having a magnetic recording portion to receive the transfer into close contact with the master carrier. In a magnetic transfer apparatus that performs magnetic transfer,
The transfer holder includes an inner surface that holds the master carrier, and a slave suction surface that protrudes to a height substantially equal to the surface of the master carrier and sucks a part of the slave medium that is stacked on the master carrier. The slave adsorption surface has a structure movable in a direction perpendicular to the surface of the master carrier.

  The transfer holder includes a one-side holder that moves toward and away, and an other-side holder that closely contacts the master carrier to one or both sides of a slave medium that receives the transfer between the one-side holder and the one-side holder or the other-side holder. On one of them, an inner surface holding the master carrier and a slave adsorption surface having a structure movable in a direction perpendicular to the surface of the master carrier, which adsorbs a part of the slave medium, can be configured.

  Further, the transfer holder is provided with only one side holder, the inner surface holding the master carrier in the one side holder, and a slave adsorption having a structure movable in a direction perpendicular to the surface of the master carrier to adsorb a part of the slave medium. And a surface. At this time, double-sided transfer can be performed by holding and closely contacting another master carrier having a closed center on the opposite surface of the slave medium to the master carrier.

  The member having the slave suction surface may be made of an elastic material, and the slave suction surface may be configured to move in a direction perpendicular to the surface of the master carrier by deformation thereof. At this time, a buffer material may be provided between the master carrier and the transfer holder, and the buffer material and the elastic material provided with the slave suction surface may be configured integrally.

  The member provided with the slave suction surface can be configured to be movably held with respect to the transfer holder and biased in the protruding direction by the biasing member.

  According to the magnetic transfer apparatus of the present invention as described above, the transfer holder holds the master carrier and the part of the slave medium that is superimposed on the master carrier so as to protrude to the same height as the surface of the master carrier. A slave adsorption surface that adsorbs the slave medium, and the slave adsorption surface is movable in a direction perpendicular to the surface of the master carrier. There is no strong contact with the suction surface, and there is no occurrence of poor adhesion between the master carrier and the slave medium, and no damage to the slave medium.

  In addition, when setting the slave medium over the master carrier held in the transfer holder, the slave suction surface is close to the inner surface of the slave medium and there is little leakage of suction air for slave suction. Slave holding force can be obtained, and it is possible to reliably prevent the slave from being displaced or dropped.

  Furthermore, even when a buffer material is interposed between the master carrier and the transfer holder in order to improve the adhesion between the master carrier and the slave medium, it is necessary to set the slave suction surface as low as the deformation of the buffer material. The gap between the back surface of the slave medium and the slave suction surface is small, there is little leakage of suction air, a good suction retention function of the slave medium is obtained, and the thickness tolerance required for the cushioning material is increased. Costs during production can be reduced.

  When the member having the slave suction surface is made of an elastic material, the structure can be easily configured. In that case, if the elastic material and the cushioning material are integrated, the structure can be further simplified. On the other hand, when the member having the slave suction surface is held movable relative to the holder and is urged in the protruding direction by the urging member, the structure has excellent durability.

  Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is a schematic sectional view showing a transfer holder in an open state of the magnetic transfer apparatus according to the first embodiment, and FIG. 2 is an enlarged view of a main part of FIG. In addition, the figure is a schematic diagram, and the dimensions of each part are shown at a ratio different from the actual.

  A transfer holder 1 of the magnetic transfer apparatus shown in FIG. 1 performs double-sided simultaneous magnetic transfer, and includes a one-side holder 5 and an other-side holder 6 each made of stainless steel, aluminum, ceramics and the like that can be moved toward and away from each other. One master carrier 3 and the slave medium 2 are held on the inner surface 5 a of the one-side holder 5, and the other master carrier 4 is held on the inner surface 6 a of the other-side holder 6. By approaching the both side holders 5 and 6, the master carriers 3 and 4 on both sides are brought into close contact with both sides of the slave medium 2 between them.

  Although not shown, the magnetic transfer device forms, for example, an internal space that is hermetically sealed by the one-side holder 5 and the other-side holder 6 of the transfer holder 1, and vacuums the air in the internal space to reduce the inside to a reduced pressure state. A vacuum suction means for obtaining an adhesion force and a magnetic field applying device for applying a transfer magnetic field while rotating the transfer holder 1 are provided. Further, the close contact between the slave medium 2 and the master carriers 3 and 4 indicates either contact close contact or close contact with a very small gap.

  As the slave medium 2, a disk-shaped magnetic recording medium such as a hard disk or a high-density flexible disk having a disk shape with a center hole 2 a having a predetermined diameter and a magnetic recording portion (magnetic layer) formed on both surfaces is used. The magnetic recording part is composed of a coating type magnetic recording layer or a metal thin film type magnetic recording layer. The master carriers 3 and 4 are formed on a disk-like disk, center holes 3a and 4a having predetermined diameters are opened, and a transfer pattern (not shown) is formed by covering a fine uneven pattern formed on a substrate with a soft magnetic material. ) In concentric circles.

  The inner diameter of the central hole 2a of the slave medium 2 is set smaller than the inner diameter of the central hole 3a of the master carrier 3 with a predetermined inner diameter difference, and this inner diameter difference portion is sucked and held by a slave suction surface 8a described later. .

  The one-side holder 5 and the other-side holder 6 are disk-shaped and include circular pressing inner surfaces 5a and 6a larger than the outer diameter of the master carriers 3 and 4, and the master carriers 3 and 4 are disposed on both sides of the pressing inner surfaces 5a and 6a, respectively. The holders 5 and 6 are held with a predetermined positioning accuracy.

  To hold the master carriers 3 and 4 on the pressing inner surfaces 5a and 6a of the holders 5 and 6 on the both sides, a large number of air suction holes (not shown) are opened almost uniformly on the pressing inner surfaces 5a and 6a. This is performed by sucking and holding 4.

  Although not shown, the back surfaces of the side holders 5 and 6 are each provided with a support shaft and are rotatably held. One or both of the one-side holder 5 and the other-side holder 6 are provided so as to be opened and closed by moving in the axial direction.

  In the one-side holder 5, as described above, the slave medium 2 is stacked and held on one master carrier 3 by suction, and this is formed at the inner peripheral side portion of the central hole 3 a of the master carrier 3. This is performed by providing a slave suction surface 8a having a suction hole 8b. The slave suction surface 8a is composed of a slave suction member 8 made of an arc-shaped elastic material, and the slave suction surface 8a is perpendicular to the contact / separation direction of the one-side holder 5 and the other-side holder 6, that is, the surface of the master carrier. It has a movable structure that can be displaced in any direction.

  The slave adsorption member 8 is installed along the central hole 3a of the master carrier 3 so that the height of the slave adsorption surface 8a is substantially equal to the surface of the master carrier 3 or slightly protrudes. Is set.

  A suction hole 8b formed through the inside of the slave suction member 8 communicates with an air passage 15 opened to the inner surface 5a of the one-side holder 5 at the bottom surface, and this air passage 15 passes through the inside of the one-side holder 5 and is not shown. It is led out through the support shaft and connected to a vacuum pump to introduce suction pressure. The central hole 2a of the slave medium 2 located on the inner periphery of the central hole 3a of the master carrier 3 by the air suction force acting on the suction hole 8b opened on the suction surface 8a of the slave suction member 8 through the air passage 15. The adjacent inner diameter difference portion is sucked to the master carrier 3 side and held so as to be in close contact with the master carrier 3.

  In the present embodiment, since the slave suction member 8 is made of an elastic material, when the both side holders 5 and 6 are closed at the time of close contact and the slave medium 2 is pressed against the master carrier 3, the slave suction member 8 is elastic. The slave suction surface 8a is deformed and is in close contact with the surface of the slave medium 2, so that suction and holding can be reliably performed in a state where there is little leakage of suction air. Examples of the elastic material include polyurethane rubber, fluorine rubber, silicone rubber, ethylene-propylene rubber, butadiene rubber, and nitrile rubber.

  Note that the slave suction surface 8a of the slave suction member 8 in a state before the slave medium 2 is pressed is provided so as to slightly protrude from the surface of the master carrier 3 held by the one-side holder 5 to reduce air leakage. Above is preferred.

  Next, FIG. 3 and FIG. 4 show a second embodiment, FIG. 3 is a schematic sectional view showing a transfer holder in an open state of the magnetic transfer device, and FIG. 4 is an enlarged view of a main part of FIG.

  In the transfer holder 10 of this embodiment, a shock-absorbing material 7 that is elastically deformed is interposed between the inner surface 5a of the one-side holder 5 and the back surface of the master carrier 3 so that the applied pressure is evenly applied by the deformation. The adhesion between the master carriers 3 and 4 and the slave medium 2 is improved, and the height of the slave suction member 18 is changed accordingly. Others are the same as the previous example, and the same reference numerals are given to the same components, and the description thereof is omitted.

  The cushioning material 7 has a disk shape that is the same shape as the master carrier 3, and the inner diameter of the central hole 7 a is formed substantially the same as that of the master carrier 3. The buffer member 7 and the slave suction member 18 of the present embodiment installed in the central holes 7a and 3a of the master carrier 3 are made of an elastic material as in the previous example. The slave suction member 18 has a slave suction surface 18a having suction holes 18b open, and is planarly the same shape as the slave suction member 8 of FIGS. The height is set to be as large as possible, and the height is set so that the slave suction surface 18a is substantially equal to the surface of the master carrier 3 or slightly protrudes.

  Similarly, the suction hole 18b of the slave suction member 18 communicates with the air passage 15 of the one-side holder 5, and an air suction force acting on the suction hole 18b causes an inner diameter difference portion near the center hole 2a of the slave medium 2 to be a master carrier. Suction and hold on 3 side.

  Also in this embodiment, since the slave adsorption member 18 is made of an elastic material, when the both side holders 5 and 6 are closed at the time of close contact and the slave medium 2 is pressed against the master carrier 3, the buffer material 7 is pressed. In addition to the deformation, the slave suction member 18 is elastically deformed, and the slave suction surface 18a is in close contact with the surface of the slave medium 2, so that suction and holding can be reliably performed in a state where the suction air leak is small.

  Next, FIG. 5 is an enlarged view of a main part showing a transfer holder of a magnetic transfer apparatus according to the third embodiment, and this embodiment is a modification of the second embodiment.

  In the transfer holder 20 of this embodiment, the cushioning material 7 interposed between the inner surface 5a of the one-side holder 5 and the back surface of the master carrier 3 and the slave adsorption member 28 made of an elastic material are integrally formed. This slave suction member 28 has a slave suction surface 28a with a suction hole 28b opened, and the form thereof is the same as that of the slave suction member 18 in FIGS. 3 and 4 of the previous example, and the suction hole 28b is formed on the one-side holder 5. The inner diameter difference portion in the vicinity of the central hole 2a of the slave medium 2 is sucked and held on the master carrier 3 side by the air suction force that communicates with the air passage 15 and acts on the suction hole 28b.

  In the present embodiment, the slave suction member 28 and the cushioning material 7 have the same functions as those of the previous example, and both are integrally configured, so that the structure is simplified and the assembly is easy.

  Next, FIG. 6 is an enlarged view of a main part showing a transfer holder of the magnetic transfer apparatus according to the fourth embodiment. The transfer holder 30 of this embodiment is the same type as that of the first embodiment (FIG. 1) in which the buffer material 7 is not installed.

  The slave suction member 38 in this embodiment includes a slave suction surface 38a that sucks the inner peripheral portion of the slave medium 2, and the entirety including the slave suction surface 38a is held movably with respect to the one-side holder 5, and the back portion. It is urged | biased by the urging | biasing member 37 installed in the protrusion direction.

  A circular recess 5b is formed at the center of the one-side holder 5, and a disk-shaped slave suction member 38 is inserted into the recess 5b so as to be movable in the axial direction. In the slave suction member 38, a suction hole 38b is opened in the outer peripheral portion of the front surface, and a central portion corresponding to the central hole 2a of the slave medium is formed in a concave shape (not necessarily required). The suction hole 38b at the outer peripheral portion is bent toward the center at the bottom and opens to the communication hole 38c at the center of the back surface. Opposite to the communication hole 38c, a suction pressure introduction port 16 is opened at the center of the recess 5b of the one-side holder 5, and both communicate with each other. A connecting pipe 36 made of an elastic material that absorbs the displacement of the slave suction member 38 is installed between the communication hole 38c of the slave suction member 38 and the suction pressure introduction port 16 to reduce leakage of suction air.

  It should be noted that the connecting pipe 36 does not need to be installed since the leakage of the outer peripheral portion of the slave suction member 38 is almost eliminated when the slave medium 2 is in contact with the slave suction surface 38a.

  The biasing member 37 is configured by a leaf spring, and biases the slave suction member 38 so that the slave suction surface 38a contacts the slave medium 2. The slave suction surface 38a is formed from the surface of the master carrier 3. The urging amount is set so as not to protrude greatly.

  In the present embodiment, the slave suction member 38 is movably installed on the one-side holder 5, so that the both-side holders 5 and 6 are closed at the time of close contact and the slave medium 2 is pressed against the master carrier 3. The member 38 is immersed, and the slave suction surface 38a is in close contact with the surface of the slave medium 2, so that suction and holding can be reliably performed in a state where there is little leakage of suction air.

  Next, FIG. 7 is an essential part enlarged view showing a transfer holder of a magnetic transfer apparatus according to a fifth embodiment. The transfer holder 40 of this embodiment is the same type as the second embodiment (FIG. 3) in which the buffer material 7 is installed, and the height of the slave suction member 48 is changed accordingly. Others are the same as the previous example, and the same reference numerals are given to the same components, and the description thereof is omitted.

  The slave suction member 48 of this embodiment has a slave suction surface 48a in which a suction hole 48b is opened, and is planarly the same shape as the slave suction member 38 of FIG. Is set to a large height, and is similarly urged in the discharge direction by a urging member 37 by a leaf spring, so that its slave suction surface 48a has a height substantially equal to the surface of the master carrier 3 or slightly protrudes. Is set to

  The suction hole 48b of the slave suction member 48 is similarly communicated with the suction pressure introduction port 16 of the one-side holder 5 through the communication port 48c, and an inner diameter difference portion in the vicinity of the center hole 2a of the slave medium 2 is set as a master carrier by air suction force. Suction and hold on 3 side.

  Also in the present embodiment, the slave suction member 48 is movably installed on the one-side holder 5, so that the both-side holders 5 and 6 are closed at the time of close contact and the slave medium 2 is pressed against the master carrier 3. The member 48 is immersed, and the slave suction surface 48a is in close contact with the surface of the slave medium 2, so that suction and holding can be reliably performed in a state where there is little leakage of suction air.

  Next, FIG. 8 is an enlarged view of a main part showing a transfer holder of the magnetic transfer apparatus according to the sixth embodiment. The transfer holder 50 of this embodiment is the same type as that of the second embodiment (FIG. 3) in which the cushioning material 7 is installed, and the height of the slave suction member 58 is changed accordingly as in FIG. Further, the sliding portion is eliminated, and the others are the same as in the previous example, and the same components are denoted by the same reference numerals and the description thereof is omitted.

  The slave suction member 58 of this embodiment has a slave suction surface 58a in which a suction hole 58b is opened, the outer diameter is set smaller than the opening diameter of the concave portion 5b of the one-side holder 5, and a gap is formed between the two. In this structure, wear and dust generated by the movement of the slave suction member 58 are suppressed.

  The suction hole 58b of the slave suction member 58 is similarly communicated with the suction pressure introduction port 16 of the one-side holder 5 through the communication port 58c, and an inner diameter difference portion in the vicinity of the central hole 2a of the slave medium 2 is caused by the air suction force. Hold by suction to the side.

  Next, FIG. 9 is a schematic sectional view showing a transfer holder of the magnetic transfer apparatus according to the seventh embodiment. The transfer holder 60 of the magnetic transfer apparatus in this embodiment performs double-sided simultaneous magnetic transfer, but is configured by only the one-side holder 5 and does not include the other-side holder 6 in each of the above-described embodiments.

  The one-side holder 5, the slave medium 2, the one master carrier 3 and the slave adsorption member 8 are configured in the same manner as in the first embodiment, and the one master carrier 3 and the slave medium 2 are placed on the inner surface 5 a of the one-side holder 5. Adsorb and hold repeatedly.

  That is, the suction hole 8b penetratingly formed inside the slave suction member 8 communicates with the air passage 15 opened to the inner surface 5a of the one-side holder 5 on the bottom surface, and the suction surface 8a of the slave suction member 8 passes through the air passage 15. An air suction force acting on the suction hole 8b that is opened to the suction hole 8b causes the inner diameter difference portion in the vicinity of the center hole 2a of the slave medium 2 located on the inner periphery from the center hole 3a of the master carrier 3 to be sucked to the master carrier 3 side, The master carrier 3 is held in close contact.

  Further, the other master carrier 4 ′ is adsorbed and held on the surface of the slave medium 2 opposite to the one-side holder 5, thereby bringing the master carriers 3 and 4 ′ on both sides into close contact with both surfaces of the slave medium 2. The other master carrier 4 'is formed on a disc-like disk and similarly has a transfer pattern (not shown) in which a fine uneven pattern formed on a substrate is covered with a soft magnetic material, but the center hole is opened. The center hole 2a of the slave medium 2 is closed when the central portion is closed and is in close contact with the slave medium 2.

  An air passage 17 that opens to the inner peripheral side of the slave suction member 8 is formed on the inner surface 5a of the one-side holder 5 separately from the air passage 15, and the slave suction member 8 that communicates with the air passage 17 is formed. The other master carrier 4 ′ is sucked toward the one-side holder 5 by the air suction force acting on the inner peripheral side and the center hole 2 a of the slave medium 2, and is held in close contact with the slave medium 2.

  In this embodiment, by omitting the other-side holder 6, a magnetic field applying device (not shown) that applies a transfer magnetic field during magnetic transfer can be brought close to the contact surface between the slave medium 2 and the master carriers 3 and 4 ′. it can. Further, since the slave suction member 8 is made of an elastic material, the same action as in the first embodiment can be obtained.

  In addition, the other side holder 6 in this embodiment is omitted, and the form of the transfer holder using only the one side holder 5 can be applied to the above-described second to sixth embodiments, and the air passage 15 or the suction pressure introduction port 16. Separately, the other master carrier 4 ′ can be sucked and held by applying a suction force to the central hole 2 a of the slave medium 2.

  In each of the above-described embodiments, the master carrier 3, 4 or 4 ′ is brought into close contact with both surfaces of the slave medium 2 to perform double-sided simultaneous magnetic transfer, but the other master carrier 4, 4 ′ is It may be omitted and one-sided sequential magnetic transfer may be performed.

1 is a schematic sectional view showing a transfer holder of a magnetic transfer apparatus according to a first embodiment of the present invention. 1 is an enlarged view of the main part of FIG. Schematic sectional view showing a transfer holder of a magnetic transfer apparatus according to a second embodiment 2 is an enlarged view of the main part of FIG. The principal part enlarged view which shows the transfer holder of the magnetic transfer apparatus concerning 3rd Embodiment The principal part enlarged view which shows the transfer holder of the magnetic transfer apparatus concerning 4th Embodiment The principal part enlarged view which shows the transfer holder of the magnetic transfer apparatus concerning 5th Embodiment The principal part enlarged view which shows the transfer holder of the magnetic transfer apparatus concerning 6th Embodiment Schematic sectional view showing a transfer holder of a magnetic transfer apparatus according to a seventh embodiment

Explanation of symbols

1,10,20,30,40,50,60 Transfer holder 2 Slave media
2a Center hole 3, 4, 4 'Master carrier
3a, 4a Center hole 5 One side holder 6 Other side holder 7 Cushioning material 8, 18, 28, 38, 48, 58 Slave suction member
8a, 18a, 28a, 38a, 48a, 58a Slave adsorption surface
27 Biasing member

Claims (7)

A magnetic transfer device for holding a master carrier having a transfer pattern corresponding to transfer information in a transfer holder, and applying a magnetic field for transfer by bringing a slave medium having a magnetic recording portion to receive the transfer into close contact with the master carrier and performing magnetic transfer In
The transfer holder includes an inner surface that holds the master carrier, and a slave suction surface that protrudes to a height substantially equal to the surface of the master carrier and sucks a part of the slave medium that is stacked on the master carrier. The magnetic transfer device is characterized in that the slave attracting surface is movable in a direction perpendicular to the surface of the master carrier.   The transfer holder includes a one-side holder that moves toward and away, and an other-side holder that closely contacts the master carrier to one or both sides of a slave medium that receives the transfer between the one-side holder and the one-side holder or the other-side holder. And a slave suction surface having a structure movable in a direction perpendicular to the surface of the master carrier for sucking a part of the slave medium. Item 2. The magnetic transfer device according to Item 1.   The transfer holder comprises only one side holder, an inner surface for holding the master carrier in the one side holder, and a slave adsorption surface having a structure movable in a direction perpendicular to the surface of the master carrier to adsorb a part of the slave medium. The magnetic transfer apparatus according to claim 1, further comprising:   4. The magnetic transfer apparatus according to claim 3, wherein another master carrier having a closed central portion is held and adhered to the opposite surface of the slave medium to the master carrier.   The member having the slave adsorption surface is made of an elastic material, and the deformation causes the slave adsorption surface to move in a direction perpendicular to the surface of the master carrier. Transfer holder for magnetic transfer device.   6. The magnetic transfer apparatus according to claim 5, wherein a buffer material is provided between the master carrier and the transfer holder, and the buffer material and the elastic material provided with the slave suction surface are integrally formed. .   4. The magnetic transfer device according to claim 1, wherein the member having the slave attracting surface is movably held with respect to the transfer holder and biased in a protruding direction by a biasing member. .

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