JP2006252705A - Original disk for transfer, holder for transfer, transfer device and magnetic recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make an original disk for transfer adhere to an object to be transferred with high precision by successfully specifying an in-surface adhesion order between the original disk for transfer and the object to be transferred. <P>SOLUTION: Original disks 11, 12 for transfer have thickness distributions in which adhesion between the original disks 11, 12 for transfer and the object 15 to be transferred starts from a specific part of transfer surfaces 11a, 12a of the original disks 11, 12 for transfer and sequentially occurs over the whole. It is desirable that the thickness distribution of the original disks 11, 12 for transfer is the one in which the maximum thickness difference of an area having transfer information is 1-100 μm. It is desirable that the thickness distribution of the original disks 11, 12 for transfer is symmetrical to centers or diameters of the original disks 11, 12 for transfer. It is desirable that the thickness distribution of the original disks 11, 12 for transfer continuously becomes thicker from the periphery side toward the center side or continuously becomes thicker from the center side to the periphery side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transfer master having transfer information to be transferred to a transfer object, a transfer holder and transfer device using the transfer master, and a magnetic recording medium manufactured by magnetic transfer.

  There are transfer techniques such as nanoimprint and magnetic transfer, in which a transfer master having transfer information on the surface is brought into close contact with a transfer target and the transfer information of the transfer master is transferred to the transfer target. In such a transfer technique, it is important to closely attach the transfer master and the transfer target.

Conventionally, a transfer master and a transfer object are held as parallel as possible to each other, and then are brought into close contact with each other. However, since the transfer surface of the transfer master and the transfer surface of the transferred object both have slight variations in surface smoothness (this depends on the manufacturing accuracy), the transfer master and the transferred object start to contact each other. The in-plane contact order from the end to the end is up to the task. For this reason, depending on the in-plane contact order, an air pool may be generated between the transfer surface and the transfer surface, and there is a possibility that the transfer master and the transfer target body may not be in good contact. Under such circumstances, a proposal has been made to start adhesion from a protruding portion of a transfer surface by curving a transfer master (Patent Document 1).
Japanese Patent Application Laid-Open No. 11-161956

  With the technique described in Patent Document 1 for bending the transfer master, it is difficult and difficult to control the curved shape with high accuracy. Further, the curved transfer master becomes floating from the inner surface of the transfer holder, and the holding by the transfer holder is unstable. For this reason, the curved state cannot be maintained even when a low pressure is applied at the beginning of the close contact, which is no different from a flat master for transfer, and the in-plane close contact order may not be well defined.

  The present invention has been made in view of the above circumstances, and it is possible to satisfactorily define the in-plane contact order between the transfer master and the transfer object, and to closely contact the transfer master and the transfer object. It is an object of the present invention to provide a simple transfer technique and a magnetic recording medium to which the transfer technique is applied.

  The present inventor has found that the above problem can be solved by giving the transfer master a thickness distribution instead of curving the transfer master, and completed the present invention.

  The transfer master of the present invention has a transfer surface having transfer information, and the transfer master in which the transfer target is in close contact with the transfer surface and the transfer information is transferred. It has a thickness distribution that starts from a specific portion of the transfer surface and sequentially occurs over the entire surface.

  In the master for transfer according to the present invention, it is preferable that the thickness distribution is a distribution in which the maximum thickness difference of the area having the transfer information is 1 to 100 μm. When the transfer master and the transfer target are disk-shaped, it is preferable that the thickness distribution is symmetric with respect to the center or diameter of the transfer master. Moreover, it is preferable that the said thickness distribution is a thickness distribution which becomes thick continuously from an outer peripheral side toward a center side, or becomes thick continuously from a center side toward an outer peripheral side.

  The master for transfer according to the present invention is suitable for magnetic transfer.

  The transfer holder of the present invention is characterized by comprising a pair of clamping members which can hold and hold the above-mentioned transfer master of the present invention and the transfer object, and can be moved close to and away from each other.

  The transfer device of the present invention comprises the above-described transfer holder of the present invention and a pressurizing unit that pressurizes the transfer holder, and the pressing force of the transfer holder by the pressurizing unit is 0.05 to 10. It is characterized by being 0 MPa.

  The magnetic recording medium of the present invention is manufactured by bringing the transfer object into close contact with the transfer master of the present invention for magnetic transfer and magnetically transferring the transfer information to the transfer surface. It is what.

  In the present invention, instead of curving the transfer master, the transfer master has a thickness distribution, so that the close contact between the transfer master and the transfer target starts from a specific location on the transfer surface and sequentially extends over the entire surface. It is what has happened. According to the present invention, it is possible to satisfactorily define the in-plane contact order between the transfer master and the transfer target, so that the occurrence of air accumulation or the like is suppressed, and the transfer master and the transfer target are closely contacted with each other. Is possible.

  In the present invention, since the transfer master is configured to have a thickness distribution, unlike the technique described in Patent Document 1 in which the transfer master is curved, high-precision processing of a structure that defines the in-plane contact order is easy. is there. In addition, unlike the technique described in Patent Document 1, a structure that prescribes the in-plane contact sequence is maintained well even in a low pressure application state at the beginning of contact, so that highly accurate contact can be stably performed.

  With reference to the drawings, the structure of a transfer master according to an embodiment of the present invention, a transfer holder using the same, and a transfer device will be described by taking double-sided magnetic transfer as an example. 1A and 1B are side views showing configurations of a transfer master, a transfer holder, and a transfer apparatus according to the present embodiment, wherein FIG. 1A is the most separated state of a pair of clamping members, and FIG. These are figures which show a closest approach state. In FIG. 1, the transfer holder is shown in a sectional view. FIG. 3 is a plan view of the transfer master, and FIG. 4 is a cross-sectional view in thickness in the track direction of the transfer master and the transfer object showing the principle of magnetic transfer.

  As shown in FIG. 1, in this embodiment, the surface information of the pair of transfer masters 11 and 12 is transferred on both sides to the transfer target 15.

  As shown in FIG. 3, the transfer masters 11 and 12 are disk-like objects having an opening at the center in plan view, and a fine surface uneven pattern (surface information) corresponding to the signal pattern transferred to the transfer target 15. A plurality of signal transfer regions 20 having P and a non-signal transfer region 30 which is located between the adjacent signal transfer regions 20 and does not have the surface uneven pattern P (see FIG. 3 for the surface uneven pattern P) ). The plurality of signal transfer regions 20 extend radially from the center side, and there is a substantially fan-shaped non-signal transfer region 30 between adjacent signal transfer regions 20. That is, the transfer masters 11 and 12 repeatedly have the signal transfer region 20 and the non-signal transfer region 30 as viewed in the track direction.

  As shown in FIG. 4B, the signal transfer region 20 of the transfer masters 11 and 12 is made of a metal having a surface concavo-convex pattern substantially the same as the surface concavo-convex pattern P corresponding to the signal pattern transferred to the transfer target 15 in a sectional view. The master substrate for transfer (master substrate) 13 and a magnetic layer 14 having a surface unevenness pattern P laminated along the surface shape.

  As the transfer target 15, a disk-shaped slave medium having a magnetic recording layer (not shown) on both sides and an opening at the center is used.

As shown in FIG. 4A, a magnetic field H _in is applied in advance in the track direction or the thickness direction to the transfer target 15 to initially magnetize the magnetic recording layer (not shown) (the magnetic field H _in is applied _{in the} track direction). This is shown in the figure). In this state, the transfer target 15 is placed opposite to the surface of the transfer master 11 (12), and both are brought into close contact with each other.

Next, as shown in FIG. 4B, a transfer magnetic field H _du is applied in a direction substantially opposite to the initial magnetization direction to the transfer master 11 (12) and the transfer target 15 that are in close contact with each other. At this time, the transfer magnetic field H _du is substantially selectively sucked only into the convex portion 14 a of the magnetic layer 14 in close contact with the transfer target 15 in the transfer master 11 (12). As a result, in the case of in-plane recording, in the magnetic recording layer of the transfer target 15, the initial magnetization of the portion in close contact with the convex portion 14a is not reversed but the initial magnetization of other portions is reversed. In the case of perpendicular recording, conversely, in the magnetic recording layer of the transfer target 15, the initial magnetization of the portion in close contact with the convex portion 14a is reversed and the initial magnetization of other portions is not reversed. In this way, the magnetization pattern corresponding to the surface unevenness pattern P of the transfer masters 11 and 12 is magnetically transferred to the transfer target 15, and a magnetic recording medium is manufactured.

  As shown in FIG. 1, the transfer holder 1 of this embodiment is schematically composed of a pair of sandwiching members 41 and 42 that can sandwich and hold a pair of transfer masters 11 and 12 and a transfer target 15 and can be moved close to and away from each other. Has been. The inner surfaces of the holding members 41 and 42 are holding surfaces 41 a and 42 a for holding the transfer masters 11 and 12 and the transfer target 15. The holding members 41 and 42 have a plurality of suction holes (not shown) connected to suction means such as a decompression pump, and the transfer masters 11 and 12 respectively hold the holding surfaces 41a and 41a of the holding members 41 and 42, respectively. It is fixed by suction to 42a. The shape of the suction hole is not particularly limited, and examples thereof include a cylindrical shape and a groove shape.

  As shown in FIG. 2A, elastic materials 51 and 52 each having a plurality of suction holes (not shown) are attached to the holding surfaces 41a and 42a of the clamping members 41 and 42, and the transfer masters 11 and 12 are attached. It is preferable to adopt a configuration that is sucked and fixed to the holding members 41 and 42 via the elastic members 51 and 52. By providing the elastic members 51 and 52, the thickness of the transfer masters 11 and 12 and the transfer target 15 and the minute variations in the shape of the holding surfaces 41a and 42a of the holding members 41 and 42 are corrected. 12 and transfer target 15 can be satisfactorily carried out, which is preferable. The elastic materials 51 and 52 are particularly effective when the area of the transfer target 15 is large. This effect can be obtained if the elastic material is provided on the holding surface of at least one clamping member.

  The clamping members 41 and 42 are substantially disk-shaped members corresponding to the shapes of the transfer masters 11 and 12 and the transfer target 15. A peripheral wall 43 that forms the peripheral surface of the transfer holder 1 is attached to the clamping member 42 along the peripheral surface thereof. The peripheral wall 43 is substantially L-shaped in cross-section when bent from the surface 42b side opposite to the holding surface of the clamping member 42 to the peripheral surface side of the clamping member 42, and is a plate parallel to the surface 42b of the clamping member 42 It is comprised from the plate-shaped member 43a, the plate-shaped member 43b parallel to the surrounding surface of the clamping member 42, and the spring member 43c inserted between plate-shaped member 43a / 43b. The plate-like member 43b is slidable with respect to the holding member 42 by expansion and contraction of the spring member 43c.

  In the transfer holder 1, as shown in FIG. 1A, a transfer target 15 is supplied between a pair of transfer masters 11 and 12 fixed to a pair of spaced-apart clamping members 41 and 42. The transfer masters 11 and 12 and the transfer target 15 are arranged to face each other. Thereafter, as shown in FIG. 1B, the pair of clamping members 41 and 42 come close to each other, and the transfer master 11 / the transfer target 15 / transfer master 12 are brought into pressure contact. Since the elastic spring member 43c is incorporated in the peripheral wall 43, when the close contact between the transfer masters 11 and 12 and the transfer target 15 is finished, the transfer masters 11 and 12 and the transfer target 15 are sandwiched regardless of the thickness. The member 41 and the peripheral wall 43 are in close contact with each other, and the inside of the transfer holder 1 is sealed.

  The transfer device 7 of this embodiment is provided with a transfer holder 1, and in addition, has a device configuration necessary for carrying out the magnetic transfer. The transfer device 7 includes, for example, a transfer body storage section that stores the transfer body 15, transfer means such as a robot arm that transfers the transfer body 15 from the transfer body storage section to the transfer holder 1, and the transfer holder 1. At least one of the pair of sandwiching members 41, 42 is moved, the sandwiching member moving means for controlling the approach and separation of the pair of sandwiching members 41, 42, and held by the transfer holder 1 from the outside of the transfer holder 1 A magnetic field applying means for applying a magnetic field to the transfer masters 11 and 12 and the transfer target 15 is provided.

  In FIG. 1, only pressing members (pressing means) 61 and 62 which are constituent elements of the holding member moving means are shown as constituent elements of the transfer device 7 other than the transfer holder 1. The pressing members 61 and 62 are attached to the surfaces 41b and 42b opposite to the holding surfaces of the holding members 41 and 42, support the holding members 41 and 42, and make the pair of holding members 41 and 42 approach each other. It is a member that presses against.

  Hereinafter, the structure of the transfer masters 11 and 12 and the contact process of the transfer masters 11 and 12 and the transfer target 15 which are the characteristics of the present embodiment will be described.

  The transfer masters 11 and 12 according to the present embodiment have a thickness distribution in which the thickness increases continuously from the outer peripheral side toward the central side and is thickest on the central side. Since the holding surfaces 41 a and 42 a of the holding members 41 and 42 are flat, the transfer masters 11 and 12 that are flexible compared to the holding members 41 and 42 and are sucked and fixed to the holding members 41 and 42 are the holding members 41 and 42. The surfaces 11b and 12b on the 42 side are flat, and the transfer surfaces 11a and 12a have a shape corresponding to the thickness distribution. In the present embodiment, the transfer surfaces 11a and 12a are partially spherical convex surfaces symmetrical with respect to the center, and the height distribution is such that the surface height continuously increases from the outer peripheral side toward the center side and the center side protrudes most. It has become. In the figure, the reference A is attached to the central axis.

  The maximum thickness difference of the signal transfer area 20 (area having transfer information) in the transfer masters 11 and 12 is preferably 1 to 100 μm, and particularly preferably 5 to 100 μm. The transfer masters 11 and 12 having such a minute thickness distribution can be processed with high precision by polishing, cutting, etching, photolithography, or the like. In addition, the transfer masters 11 and 12 having a minute thickness distribution can be manufactured and processed with high accuracy by performing electroforming or the like using a mold processed by polishing, cutting, etching, photolithography, or the like.

  One or both surfaces of the transfer masters 11 and 12 are subjected to surface treatment as necessary. For example, for the purpose of reducing the frictional force, the transfer masters 11 and 12 can be subjected to a roughening process such as blasting.

  An area corresponding to the signal transfer area 20 of the holding members 41 and 42 in order to satisfactorily apply a magnetic field to the transfer masters 11 and 12 and the transfer target 15 held in the transfer holder 1 from the outside of the transfer holder 1. The thickness is usually on the order of mm, and is preferably 10 mm or less. Although the thickness distribution of the transfer masters 11 and 12 is as small as μm with respect to the sandwiching members 41 and 42 having a thickness of mm order, the thickness distribution of the transfer masters 11 and 12 is exaggerated for easy understanding in the drawings. It is shown.

  In this embodiment, the close contact with the transfer target 15 is started from the inner peripheral portion that is the most protruding portion of the transfer masters 11 and 12. That is, both the close contact between the transfer master 11 and the transfer target 15 and the close contact between the transfer target 15 and the transfer master 12 start from the inner peripheral portion of the transfer surfaces 11a and 12a and sequentially move toward the outer peripheral portion. Happens across.

  In the present embodiment, as shown in FIG. 1B or FIG. 2B, the maximum height difference of the signal transfer region 20 on the transfer surfaces 11a and 12a is reduced from before the close contact at the end of the press contact, and at the end of the close contact. The material and the like of the transfer surfaces 11a and 12a are designed so that the transfer surfaces 11a and 12a have a flat surface or a surface shape close thereto. In such a configuration, the surfaces 11b and 12b opposite to the transfer surfaces of the transfer masters 11 and 12 at the end of the close contact are pushed outward to form, for example, a convex shape as shown in the figure. As the surfaces 11b and 12b opposite to the transfer surfaces of the transfer masters 11 and 12 are pushed, the holding members 41 and 42 or the elastic members 51 and 52 are deformed. The pressure difference between the transfer surfaces 11a and 12a is reduced by the pressure contact, and the transfer surfaces 11a and 12a are flat or close to the surface shape, so that the pair of transfer masters 11 and 12 and the transfer target 15 are transferred. Adhesion with is favorably carried out over the entire surface, which is preferable.

  The present inventor has found that the in-plane contact order is well defined as described above by setting the maximum thickness difference of the signal transfer region 20 of the transfer masters 11 and 12 to 1 μm or more, preferably 5 μm or more. ing. The inventor of the present invention sets the maximum thickness difference in the region to 100 μm or less, so that the transfer masters 11 and 12 do not float from the sandwiching members 41 and 42 (or the elastic members 51 and 52), and the transfer masters 11 and 12 It has been found that the entire surface of the sheet is in good contact with the clamping members 41 and 42 (or the elastic members 51 and 52) and the transfer masters 11 and 12 are stably held by the transfer holder 1. It has also been found that by causing the maximum thickness difference in the region to be 100 μm or less, damage due to the curvature of the transfer masters 11 and 12 is suppressed.

  In the present embodiment, the pressure applied to the transfer holder 1 by the pressing members (pressing means) 61 and 62 is preferably 0.05 to 10.0 MPa. In magnetic transfer, the applied pressure is particularly preferably 0.05 to 1.0 MPa. If the applied pressure is too small, the transfer masters 11 and 12 and the transfer target 15 may not be in close contact with each other. If the applied pressure is excessive, the contact speed between the transfer masters 11 and 12 and the transfer target 15 is high. There is a possibility that the in-plane contact order is not well defined as described above.

  The transfer masters 11 and 12, the transfer holder 1, and the transfer device 7 according to the present embodiment are configured as described above.

  In this embodiment, instead of curving the transfer master, the transfer masters 11 and 12 have a thickness distribution so that the transfer masters 11 and 12 and the transfer target 15 are in close contact with the transfer surfaces 11a and 12a. It starts from a specific point of and realizes what happens sequentially throughout. According to this embodiment, since the in-plane contact order between the transfer masters 11 and 12 and the transfer target 15 can be well defined, the occurrence of air accumulation or the like is suppressed, and the transfer masters 11 and 12 and the transfer target are suppressed. 15 can be closely attached to each other with high accuracy.

  In the present embodiment, the thickness distribution of the transfer masters 11 and 12 is a distribution that is symmetric with respect to the center of the transfer masters 11 and 12 (a distribution that is rotationally symmetric with respect to the central axis A). 12 and the transfer target 15 are sequentially and stably progressed uniformly from the inner peripheral portion toward the outer peripheral portion in the circumferential direction, and the in-plane contact order is well defined.

  In this embodiment, unlike the technique described in Patent Document 1 in which the transfer masters 11 and 12 are curved, high-precision processing of the transfer masters 11 and 12 that defines the in-plane contact order is easily performed at low cost. it can. As described above, the transfer masters 11 and 12 can be accurately processed by, for example, polishing, cutting, etching, photolithography, or the like. The transfer masters 11 and 12 can also be manufactured and processed with high accuracy by performing electroforming or the like using a mold processed by polishing, cutting, etching, photolithography, or the like. Unlike the technique described in Patent Document 1, the entire surfaces of the transfer masters 11 and 12 are stably held by the transfer holder 1 without floating from the sandwiching members 41 and 42 (or the elastic members 51 and 52). Therefore, the shapes of the transfer masters 11 and 12 that define the in-plane contact sequence can be maintained well even in a low pressure application state at the beginning of contact, and high-precision contact can be stably performed.

  In the present embodiment, when the transferred object 15 is removed after the application of the magnetic field, a restoring force for returning to the original shape acts on the transfer masters 11 and 12 by releasing the applied pressure to the transfer holder 1. . Since the restoring force acts as a force for peeling the transfer body 15 from the transfer surfaces of the transfer masters 11 and 12, the transfer object 15 can be easily peeled from and removed from the transfer masters 11 and 12.

  Since the transfer holder 1 and the transfer device 7 of this embodiment use the transfer masters 11 and 12, high-precision magnetic transfer can be performed. By using the transfer holder 1 and the transfer device 7 of the present embodiment, a magnetic recording medium with good transfer accuracy can be stably manufactured.

(Other aspects)
The above embodiment is merely an example, and the design can be changed as appropriate.

  The transfer masters 11 and 12 have the same effects as those of the above-described embodiment as long as the masters 11 and 12 have a thickness distribution that starts from a specific portion of the transfer surfaces 11a and 12a and sequentially occurs over the entire surface. can get.

  The transfer holder 2 shown in FIG. 5A has a thickness distribution in which the transfer masters 11 and 12 are continuously thick from the center side toward the outer peripheral side, and the outer peripheral side protrudes most. The transfer surfaces 11a and 12a are This is a mode in which the concave shape is a partial spherical shape that is symmetric with respect to the center of the transfer body 15. In such a configuration, the close contact between the transfer masters 11 and 12 and the transfer target 15 occurs sequentially from the outer peripheral portion toward the inner peripheral portion.

  The transfer master 11 and the transfer master 12 may have different thickness distributions. In the transfer holder 3 shown in FIG. 5B, the transfer master 11 has the thickness distribution shown in FIG. 1A, and the transfer master 12 has the thickness distribution shown in FIG. 4A. It is.

  In the transfer holders 4 and 5 shown in FIGS. 6A and 6B, the transfer masters 11 and 12 are continuously thickened from the outer peripheral side toward the center side, and the center side protrudes the most, as in the above embodiment. Although it has a thickness distribution, the transfer surfaces 11 a and 12 a have a substantially conical convex shape symmetrical with respect to the center of the transfer target 15.

  The transfer masters 11 and 12 may have a thickness distribution that is symmetric with respect to the diameter, and the transfer surfaces 11a and 12a may have a surface shape that is symmetric with respect to the diameter. Even in such a configuration, the close contact between the transfer masters 11 and 12 and the transfer target 15 proceeds symmetrically corresponding to the shape of the transfer surface, and the in-plane contact order is well defined. Examples of the surface shape symmetric with respect to the diameter include a parabolic shape, a partial cylindrical surface shape, and a saddle surface shape.

  The transfer holder 6A shown in FIG. 7 is an aspect in which the transfer surfaces 11a and 12a of the transfer masters 11 and 12 are partially cylindrical. FIG. 7A is a perspective view of a partially cylindrical transfer surface 11a. FIG. 7B is a plan view of the transfer master 11 to the sandwiching member 41 as viewed from the transfer surface side of the transfer master 11 and two side surfaces of the transfer master 11 to the sandwiching member 41 as viewed from a direction shifted by 90 °. It is a figure (The clamping member 41 is shown with sectional drawing). Since the holding member 42 side has the same configuration, the illustration is omitted.

  The transfer holder 6B shown in FIG. 8 is an embodiment in which the transfer surfaces 11a and 12a of the transfer masters 11 and 12 are in the shape of a flange. FIG. 8 corresponds to FIG. On the flange-shaped transfer surface 11a (12a), the two locations on the same diameter of the outer periphery protrude most, and the portion shifted by 90 ° is the most concave and convex surface shape. In such a configuration, the close contact between the transfer masters 11 and 12 and the transfer target 15 starts from two locations on the same diameter of the outermost protruding portion and proceeds sequentially from the highest surface height to the lower one. .

  The transfer masters 11 and 12 preferably have a thickness that continuously changes from the thicker side to the thinner side, but the thickness changes stepwise from the thicker side to the thinner side. It may be a thing.

  The fixing of the transfer masters 11 and 12 to the sandwiching members 41 and 42 is not limited to suction fixing, but may be fixing by an adhesive or magnetic force.

  The transfer holders 1 to 5, 6A, and 6B use a pair of transfer masters according to the present invention. If at least one of the transfer masters according to the present invention is used, only a flat transfer master with no thickness distribution is used. It is possible to carry out better adhesion than conventional transfer holders using.

  In the above-described embodiment, the double-sided transfer has been described. However, in the present invention, one transfer master 11 and the transfer target 15 are arranged to face each other between a pair of holding members 41 and 42 in a separated state, and a pair of holding members. It can also be applied to single-sided transfer in which transfer information on the transfer master 11 is transferred to the transfer target 15 by pressing and adhering the transfer master 11 and the transfer target 15 by bringing 41 and 42 close to each other.

  The present invention can be preferably applied to magnetic transfer that requires strict position adjustment, but can be applied to any transfer technology that transfers information such as magnetic information and shape by bringing a transfer master and a transfer target into close contact with each other. is there.

  The present invention relates to magnetic transfer, nano-in transfer, in which a transfer master having a predetermined concavo-convex pattern on the surface is brought into close contact with a transfer target, and information such as magnetic information and concavo-convex pattern shape corresponding to the concavo-convex pattern of the transfer master is transferred. It can be preferably applied to a transfer technique such as printing and patterned media.

(A), (b) is a side view which shows the structure of the master for transfer of the embodiment which concerns on this invention, the holder for transfer, and the transfer apparatus. (A), (b) is a figure which shows the other aspect of the holder for transcription | transfer of this invention. Plan view of master for transfer Sectional view showing the principle of magnetic transfer (A), (b) is a figure which shows the other aspect of the master for transcription | transfer of this invention, and the holder for transcription | transfer. (A), (b) is a figure which shows the other aspect of the master for transcription | transfer of this invention, and the holder for transcription | transfer. (A), (b) is a figure which shows the other aspect of the master for transcription | transfer of this invention, and the holder for transcription | transfer. (A), (b) is a figure which shows the other aspect of the master for transcription | transfer of this invention, and the holder for transcription | transfer.

Explanation of symbols

1-6A, 6B Transfer holder 7 Transfer device 11, 12 Transfer master 11a, 12a Transfer surface 11b, 12b Surface opposite to the transfer surface 15 Transfer object 41, 42 Holding member 51, 52 Elastic material 61, 62 Press Member (Pressurizing means)

Claims (9)

  In a transfer master having a transfer surface having transfer information, and the transfer object is brought into close contact with the transfer surface and the transfer information is transferred, the close contact with the transfer object starts from a specific location on the transfer surface. A transfer master having a thickness distribution that occurs sequentially over the whole.   2. The master for transfer according to claim 1, wherein the thickness distribution is a distribution having a maximum thickness difference of 1 to 100 μm in a region having the transfer information.   The transfer master according to claim 1 or 2, wherein the transfer master and the transfer target are disk-shaped, and the thickness distribution is symmetrical with respect to a center or a diameter of the transfer master. Master.   4. The transfer master according to claim 3, wherein the thickness distribution is a thickness distribution that continuously increases from the outer peripheral side toward the center side or continuously increases from the center side toward the outer periphery side. .   The surface opposite to the transfer surface is a flat surface, the transfer surface has a height distribution corresponding to the thickness distribution, and the maximum height difference of the region having the transfer information on the transfer surface is the adhesion The transfer master according to any one of claims 1 to 4, wherein the transfer master is configured to be reduced from the start of the close contact at the end of the step.   The master for transfer according to any one of claims 1 to 5, which is for magnetic transfer.   7. A transfer holder comprising a pair of clamping members that are capable of approaching and separating from each other and that holds and holds the transfer master according to claim 1 and the transfer target.   A transfer holder according to claim 7 and a pressurizing unit that pressurizes the transfer holder, and the pressing force of the transfer holder by the pressurizing unit is set to 0.05 to 10.0 MPa. Characteristic transfer device.   7. A magnetic recording medium manufactured by bringing the transfer medium into close contact with the transfer master according to claim 6 and magnetically transferring the transfer information onto the transfer surface.

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