JP2008130204A - Magnetic transfer device, magnetic disk medium manufactured by magnetic transfer device, and magnetic disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic transfer device using a master carrier used for servo pattern writing to a magnetic recording medium used for a magnetic disk device, in which such a situation is avoided that the master carrier is bent in a non-transfer region other than a servo region of the magnetic recording medium and a region where transfer is not originally needed comes in contact with the master carrier during magnetic transfer, and thereby peeling of a lubricant applied on the surface of the magnetic recording medium in the non-transfer region other than the servo region and adhesion of dirt due to unnecessary contact are prevented. <P>SOLUTION: A ring-shaped spacer sandwiched by an outer circumferential part of a slave medium and the master carrier is provided at a facing part of the master carrier and the slave medium and positive pressure is generated in a space enclosed by the master carrier, the slave medium and the spacer, so that the master carrier and the slave medium do not come in contact with each other in the region other than the servo region. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic transfer device for writing a servo pattern on a magnetic recording medium used in a magnetic disk device, and in particular, a magnetic transfer master carrier provided with a magnetic material corresponding to the servo pattern on the surface of a slave medium that is a magnetic recording medium. The present invention relates to a magnetic transfer device that makes contact while applying and magnetically transfers a servo pattern onto the surface of a slave medium.

  As the recording density of the data area of the disk increases with the recent increase in the density of the hard disk, a higher density is also required in writing servo signals necessary for positioning the magnetic head.

  In the magnetic disk device, servo areas are formed alternately with the data area in order to position the magnetic head on the magnetic disk medium. Conventionally, servo data written in a servo area has been recorded by a ServoTrack Writer using a dedicated head. In the servo area on the magnetic disk medium, a preamble area, a servo mark area, and a servo data area are partitioned in order from the upstream side with respect to the magnetic head. In the preamble region, positive and negative magnetic poles are alternately formed at uniform intervals along the circumferential direction. In the servo data area, magnetic poles are formed in a predetermined pattern that changes in the radial direction.

  In the magnetic disk device, a synchronization signal is obtained from magnetic information read in the preamble area.

  The head is accurately positioned on the recording track based on the magnetic information read from the servo data area.

  In an STW (SERVO TRACK WRITEING) method for writing servo data using a conventional Servo Track Writer, an increase in the time required for writing servo information per magnetic recording medium as the write data density increases increases the time required for the hard disk device. It is considered a bottleneck during mass production. For this, an STW method using a magnetic transfer method has been proposed. In the magnetic transfer method, servo information is recorded on a slave medium, which is a magnetic recording medium, by bringing a master carrier on which servo information has been recorded in advance into close contact with the medium while applying a magnetic field.

  As shown in an example of the master carrier for magnetic transfer in FIG. 4, the structure of the master carrier is curved on the surface of the disk-like master carrier 40, and a plurality of servo areas 41 extend radially. Inside, a servo pattern 42 composed of uneven portions is formed, and the data area corresponding portion 43 of the slave medium between the adjacent servo areas 41 is recessed.

  In the servo area 41 indicated by the curved black color, the slave medium (not shown) after the servo pattern 42 is transferred is incorporated in the magnetic disk device, and the inside and outer peripheral edges of the surface of the slave medium are illustrated for explanation. The illustrated magnetic head 44 is rotationally driven left and right in a fan shape by a rotary positioner 45 so as to read a servo pattern transferred on the surface of a slave medium. The width of the servo area 41 is actually the master carrier. It is narrow on the inner peripheral side of 40 and wide on the outer peripheral side.

  FIG. 5 shows an example of a conventional magnetic transfer apparatus. a) The figure shows the main part before the master carrier and the slave medium are brought close to each other, and b) The main part at the time when the master carrier and the slave medium are brought close to each other for magnetic transfer. The master carrier 50 is provided with a servo pattern 54, an inner peripheral protrusion 52, and an outer peripheral protrusion 53 made of an etching technique on a thin Ni plate on the surface, and is backed by a reinforcing member (not shown).

  In the figure, on the surface of the master carrier 50, there are a servo pattern 54, an inner peripheral protrusion 52 having the same height as the convex part of the servo pattern 54, and an outer peripheral protrusion 53 having the same height as the convex part of the servo pattern 54. The inner peripheral projection 52 and the outer peripheral projection 53 are made concentrically and uniformly at the same height as the convex portion of the servo pattern 54 at locations corresponding to the vicinity of the inner and outer periphery of the slave medium 51. The slave medium 51 is provided with a magnetic recording layer (not shown) on the surface of the glass substrate where the servo pattern 54 on the master carrier 50 is provided. The master carrier 50 held by the master carrier rotating shaft holder 55 and the slave medium 51 held by the slave medium rotating shaft holder 56 are a master carrier 50 and a slave medium 51 of a magnetic transfer device (not shown). The alignment mechanism control unit adjusts the respective rotation center axes and relative rotation angles so that the surfaces of the master carrier 50 and the slave medium 51 are in contact with each other, and the external magnetic field necessary for magnetic transfer is generated by the electromagnet 57 while rotating without deviating from each other. Magnetic transfer is performed by being added to the master carrier 50 and the slave medium 51.

  When this magnetic transfer method is applied to mass production of a magnetic recording medium used in a hard disk device, the lubricant provided on the surface of the slave medium comes into contact with the master carrier and the problem caused by the lubricant adhering to the master carrier. Must be considered. That is, the lubricant applied to the slave medium peels over a wide range of the non-transfer area other than the servo area, and contamination (contamination, impurities, foreign matter, contaminants, etc.) adhering to the master carrier is reappeared on the slave medium. It is considered that there is a problem that the possibility of adhesion increases.

The contact of the non-transfer area of the slave medium with the master carrier itself is a problem. As a related known example for avoiding the contact between the non-transfer area of the slave medium and the master carrier, JP-A-2002-251721 discloses that the slave medium at the time of transfer is placed on the non-transfer area of the master carrier for magnetic transfer. A technique for extending the life of the master carrier by providing convex portions for reducing the contact pressure with the concavo-convex pattern formed in the transfer region is disclosed, and in Japanese Patent Laid-Open No. 2004-79059, the master carrier is a slave A plurality of protrusions having a height from an average surface of 100 nm or less are formed on a portion in contact with the magnetic recording medium as a medium, and 30 or less protrusions having a height from the average surface of 50 nm or more per 90 μm ^2. In addition, the number of protrusions having a height from the average surface of 2 nm or more is formed at a ratio of 5 to 300 per 90 μm ² . Compared to the case where there is no protrusion on the part that contacts the slave medium, it is easier to vent air when it is in close contact with the slave medium, and it is difficult for air clogging to occur, and there is no poor contact due to spacing loss due to the protrusion. By improving the adhesion, the improvement in adhesion improves the recording quality of the transfer signal by preventing the occurrence of signal loss. In addition, if it becomes difficult to peel off the slave medium after transferring it in close contact with the slave medium, it will be necessary to apply extra force to the master carrier or slave medium, which may cause damage, but the truth A technique is described in which if the contact area is small, it is easy to peel off, and one cause of breakage can be eliminated.

  FIG. 6 is a detailed view of an example of a conventional magnetic transfer apparatus. FIG. 6 is a cross-sectional view illustrating the relationship between the master carrier 50 and the slave medium 51 in FIG. 5 in more detail.

  a) is a sectional view of the master carrier, b) is a sectional view of the master carrier and the slave medium, and c) is a sectional view when the master carrier and the slave medium are pressed together.

  a) In the figure, on the surface of the master carrier 60, the servo pattern 64, the inner peripheral projection 62 having the same height as the convex portion of the servo pattern 64, and the outer peripheral projection having the same height as the convex portion of the servo pattern 64 are also shown. 63, and the inner peripheral protrusion 62 and the outer peripheral protrusion 63 are formed at the same height as the convex portion of the servo pattern 64 in a concentric uniform manner at locations corresponding to the vicinity of the inner and outer periphery of the slave medium described below. It has been. The central axis of the master carrier 60 is represented by the central axis 65.

  b) In the figure, the slave medium 61 is provided with a magnetic recording layer (not shown) on the surface of the glass substrate where the servo pattern 64 on the master carrier 60 is provided.

  c) In the figure, the master carrier 60 held by the holder 66 with the rotation axis for master carrier and the slave medium 61 held by the holder 67 with the rotation axis for slave medium are the master carrier 60 of the magnetic transfer device not shown. The respective rotation center axes and relative rotation angles are adjusted by the alignment mechanism control unit with the slave medium 61 so that the surfaces of the master carrier 60 and the slave medium 61 are in contact with each other.

  Here, the slave medium 61 is made of a glass substrate and has rigidity, whereas the master carrier 60 has a synthetic resin sub-master attached to a thin Ni plate with a thickness of about 100 μm, for example. In addition, in the non-transfer area other than the servo area, the sub master bends as shown in the figure. The figure shows a cross section in the radial direction. Further, when paying attention to the track direction, the data area (non-transfer area) of the slave medium that does not need to be transferred at the time of magnetic transfer is easily contacted with the sub-master. Yes.

  That is, even when the master carrier having the structure as in the above-described known example is applied during mass production of the magnetic recording medium, the distance between the servo areas is, for example, about 10,000 times the servo pattern height (several tens nm to several hundreds nm). This is insufficient to avoid contact between the surface of the master carrier and the surface of the slave medium between adjacent servo areas. It is difficult to prevent a portion that does not need to come into contact due to the flatness of the surface of the master carrier or slight deflection. Even if the member of the submaster is made of metal instead of synthetic resin, contact with the surface of the slave medium due to the flatness of the surface of the master carrier or bending can occur.

Here, in FIG. 6, the substrate of the slave medium is made of, for example, glass, and has sufficient rigidity with respect to the master carrier. Therefore, the displacement of the slave medium at the time of transfer pressure bonding is ignored compared with the displacement of the master carrier. It is drawn as a thing.
JP 2002-251721 A JP 2004-79059 A

  The present invention relates to a magnetic transfer device used for writing a servo pattern to a magnetic recording medium used in a magnetic disk device, wherein the master carrier is bent in a non-transfer area other than the servo area of the magnetic recording medium, and is originally transferred during magnetic transfer. This avoids unnecessary areas from coming into contact with the master carrier, thereby preventing the lubricant applied to the surface of the magnetic recording medium from being peeled off in non-transfer areas other than the servo area, and preventing contamination due to unnecessary contact. An object of the present invention is to provide a magnetic transfer apparatus.

  According to the first aspect of the present invention, in the magnetic transfer apparatus using the master carrier for magnetic transfer, the elasticity sandwiched between at least the outer peripheral portion of the slave medium and the master carrier in the facing portion between the master carrier and the slave medium. A ring-shaped spacer made of a member, and the master carrier and the slave medium are pressed through the spacer in a direction in which the spacer is compressed, thereby being surrounded by the master carrier, the slave medium, and the spacer. A magnetic transfer device having a pressurizing unit for generating a positive pressure in a space.

  FIG. 1 shows a first embodiment of a magnetic transfer apparatus according to the present invention. a) The figure shows the main part before the master carrier and the slave medium approach each other, and b) The figure shows a ring-shaped spacer made of an elastic member between the master carrier and the slave medium on the outer periphery of the slave medium. C) In the figure, the master carrier and the slave medium are brought close to each other via a ring-shaped outer peripheral spacer made of an elastic member, and positive pressure is applied to the space surrounded by the master carrier, the slave medium, and the spacer. The main part at the time of generating the magnetic transfer is shown.

  A resilient ring-shaped outer peripheral spacer 13 sandwiched between a position close to the outer peripheral portion of the slave medium 11 and the master carrier 10 is provided at an opposing portion of the master carrier 10 and the slave medium 11. The outer peripheral spacer 13 is made of, for example, neoprene rubber, and is a ring-shaped spacer having a rectangular cross section as shown in the figure. The initial height of the outer peripheral spacer 13 is higher than the convex portion of the servo pattern 14. In the spacer having elasticity, the master carrier 10 and the slave medium 11 are aligned by the master carrier rotating shaft holder 15 for holding the master carrier 10 and the slave medium rotating shaft holder 16 for holding the slave medium 11. The magnetic pattern is contracted to the height of the convex portion of the servo pattern 14 during magnetic transfer. At this time, the air in the space surrounded by the master carrier 10, the slave medium 11, and the outer peripheral spacer 13 is confined, and a predetermined positive pressure is applied to the inside during magnetic transfer.

  Due to the pressure of the air trapped inside, the master carrier 10 cancels out the force to bend into the space, and the slave medium 11 and the master carrier 10 in areas other than the servo area (not shown) where the servo pattern 14 is provided. In this state, the slave medium 11 and the master carrier 10 rotate in the rotation direction shown in FIG. C), and the electromagnet 17 (lead wire not shown) rotates the slave medium while generating an external magnetic field. By moving the outer side of the shaft holder in the radial direction, the servo pattern 14 formed on the surface of the master carrier 10 made of Ni having a thickness of several hundred μm and having the uneven surface is magnetically applied to the slave medium 11. Transcript to.

Here, the electromagnet 17 may be a permanent magnet. Further, the master carrier 10 and the slave medium 11 may be in the opposite positions. Further, the master carrier 10 and the slave medium 11 may be plural, and the slave medium 11 may have a magnetic recording medium layer on one side or both sides.

  According to the first aspect of the present invention, the ring-shaped spacer made of an elastic member sandwiched between at least the outer peripheral portion of the slave medium and the master carrier is provided at the facing portion between the master carrier and the slave medium, and the master carrier is interposed via the spacer. And the slave medium are pressed in the direction in which the spacer is compressed, so that a positive pressure is generated in the space surrounded by the master carrier, the slave medium, and the spacer, and the master carrier and the slave medium are mutually connected in an area other than the servo area. It is a magnetic transfer device characterized by preventing contact.

  An elastic ring-shaped spacer sandwiched between at least the outer peripheral portion of the slave medium and the master carrier is installed at the opposing portion of the master carrier and the slave medium. The initial height of the spacer is higher than the convex portion of the servo pattern, and the spacer having elasticity at the time of magnetic transfer is contracted to the height of the convex portion of the servo pattern. At this time, the air in the space surrounded by the master carrier, the slave medium, and the spacer is confined and air is not leaked to the outside so that a predetermined positive pressure is applied to the inside during magnetic transfer. .

  For example, a spacer made of neoprene is sandwiched between a master carrier and a slave medium, and the spacer is compressed via a reinforcing plate on the outside of the master carrier and the slave medium, respectively, so that the master carrier and the slave medium are provided on the master carrier. When the servo carrier is compressed to a height touching the convex portion of the servo pattern, a positive pressure of several to several tens of atmospheres is generated in the space surrounded by the master carrier, the slave medium, and the spacer, so that the master carrier and the slave medium are Contact is prevented in areas other than the servo area.

  Here, an elastic ring-shaped spacer sandwiched between at least the outer peripheral portion of the slave medium and the master carrier is installed at the opposing portion of the master carrier and the slave medium, for example, one on the outer peripheral portion of the slave medium, A plurality of spacers such as one elastic ring-shaped spacer may be provided on the inner periphery of the slave medium.

  Further, the magnetic transfer apparatus according to the present invention includes a case where a magnetic recording medium such as a perpendicular magnetic recording medium or a horizontal plane magnetic recording medium is used as a slave medium. Furthermore, a case where a plurality of slave media are stacked and magnetically transferred is also included.

  Further, the magnetic recording surface of the slave medium may be either one side or both sides.

  The invention according to claim 2 of the present invention further includes pressurizing means for filling the pressurized gas in the space surrounded by the master carrier, the slave medium, and the spacer to generate a positive pressure. The magnetic transfer apparatus according to claim 1.

  According to the second aspect of the present invention, in order to more accurately control the positive pressure in the space surrounded by the master carrier, the slave medium, and the spacer, the space surrounded by the master carrier, the slave medium, and the spacer From the outside, for example, by introducing a high-pressure argon gas supplied by a high-pressure argon gas cylinder and confirming the pressure of the space with a pressure gauge provided in the magnetic transfer device, the master carrier and the slave medium The master carrier is controlled while controlling the pressure in the space surrounded by the spacers to a desired pressure until compression starts from the initial height of the spacer and the convex portion of the servo pattern of the master carrier contacts the magnetic recording surface of the slave medium. And a slave medium can be brought close to each other, and a desired pressure can be maintained during magnetic transfer.

  According to a third aspect of the present invention, in the magnetic transfer apparatus using the master carrier for magnetic transfer, the rigidity sandwiched between at least the outer peripheral portion of the slave medium and the master carrier at the facing portion between the master carrier and the slave medium. A ring-shaped spacer made of a member, and the master carrier and the slave medium are brought close to each other in the direction in which the spacer is compressed via the spacer, and added to a space surrounded by the master carrier, the slave medium, and the spacer. A magnetic transfer apparatus comprising a pressurizing unit that fills a pressurized gas and generates a positive pressure.

  According to the invention described in claim 3, the ring-shaped spacer member is, for example, Ni or stainless steel, and the thickness is equal to or greater than the height of the convex portion of the servo pattern provided on the master carrier. A ring-shaped spacer having a flat rectangular cross section is provided at one location on the inner side near the outer periphery of the slave medium, or at one location each on the inner side near the outer periphery of the slave medium and the inner side near the inner periphery of the slave medium. Due to the above, the master carrier and the slave medium are brought into contact with each other, and a positive pressure of 10 to several hundred atmospheres, for example, supplied by a high-pressure argon gas cylinder is generated in the space surrounded by the master carrier, the slave medium, and the spacer. To generate a large positive pressure in the space surrounded by the master carrier, the slave medium, and the spacer. DOO can be difficult to further contact in the region other than the servo area.

  According to a fourth aspect of the present invention, there is provided a magnetic disk medium manufactured by using the magnetic transfer apparatus according to the first to third aspects.

  A fifth aspect of the present invention is a magnetic disk device having the magnetic disk medium.

  According to the present invention, the space surrounded by the master carrier, the slave medium, and the spacer is maintained at a positive pressure, thereby preventing the portion corresponding to the data area other than the servo area of the slave medium from contacting the master carrier. Can extend the lifespan. Furthermore, quality deterioration of the slave medium can be avoided without causing unnecessary foreign matter to adhere to the surface of the slave medium. In addition, by providing a spacer near the inner and outer circumferences of the slave medium, the convexity of the servo pattern of the master carrier can equalize the pressure applied to the slave medium, thereby reducing the uneven transfer of the servo pattern on the entire surface of the medium. .

  In the present invention, a ring-shaped spacer sandwiched between the outer periphery of the slave medium and the master carrier is provided at the opposite portion of the master carrier and the slave medium, and the master carrier and the slave medium are added in the direction of compressing the spacer via the spacer. By applying pressure, a positive pressure is generated in a space surrounded by the master carrier, the slave medium, and the spacer, so that the master carrier and the slave medium do not contact each other in a region other than the servo region.

  As described above, FIG. 1 shows a first embodiment of a magnetic transfer apparatus according to the present invention. In the figure, a) shows the main part before the master carrier and the slave medium approach each other, and b) the figure shows a ring-shaped spacer made of an elastic member between the master carrier and the slave medium. C) In the figure, a space surrounded by the master carrier, the slave medium and the spacer is provided by bringing the master carrier and the slave medium close to each other via a ring-shaped outer circumference spacer made of an elastic member. The main part at the time of generating a positive pressure and performing magnetic transfer is shown.

  A resilient ring-shaped outer peripheral spacer 13 sandwiched between a position close to the outer peripheral portion of the slave medium 11 and the master carrier 10 is provided at an opposing portion of the master carrier 10 and the slave medium 11. The outer peripheral spacer 13 is made of, for example, neoprene rubber, and is a ring-shaped spacer having a rectangular cross section as shown in the figure. The initial height of the outer peripheral spacer 13 is higher than the convex portion of the servo pattern 14. In the spacer having elasticity, the master carrier 10 and the slave medium 11 are aligned by the master carrier rotating shaft holder 15 for holding the master carrier 10 and the slave medium rotating shaft holder 16 for holding the slave medium 11. The magnetic pattern is contracted to the height of the convex portion of the servo pattern 14 during magnetic transfer.

  At this time, the air in the space surrounded by the master carrier 10, the slave medium 11, and the outer peripheral spacer 13 is confined, and a predetermined positive pressure is applied to the inside during magnetic transfer.

  Due to the pressure of the air trapped inside, the master carrier 10 cancels out the force to bend into the space, and the slave medium 11 and the master carrier 10 in an area other than the servo area (not shown) where the servo pattern 14 is provided. In this state, the slave medium 11 and the master carrier 10 rotate in the rotation direction shown in FIG. C), and the electromagnet 17 (lead wire not shown) rotates the slave medium while generating an external magnetic field. By moving the outer side of the shaft holder in the radial direction, the servo pattern 14 formed on the surface of the master carrier 10 made of Ni having a thickness of several hundred μm and having a concavo-convex surface is magnetically applied to the slave medium 11. Transcript to.

Here, the electromagnet 17 may be a permanent magnet. Further, the master carrier 10 and the slave medium 11 may be in the opposite positions. Further, the master carrier 10 and the slave medium 11 may be plural, and the slave medium 11 may have a magnetic recording medium layer on one side or both sides.

  FIG. 2 shows a second embodiment of the magnetic transfer apparatus according to the present invention. a) The figure shows the main part before the master carrier and the slave medium approach each other, and b) The figure shows a ring-shaped spacer made of an elastic member between the master carrier and the slave medium on the outer periphery of the slave medium. C) In the figure, a master carrier and a slave medium are connected to each other via a ring-shaped outer peripheral spacer and an inner peripheral spacer made of an elastic member. The main part at the time when magnetic transfer is performed by generating a positive pressure in a space surrounded by the master carrier, the slave medium, and the spacer is shown.

  A resilient ring-shaped outer peripheral spacer 23 sandwiched between an outer peripheral portion of the slave medium 21 and the master carrier 20 at an opposing portion of the master carrier 20 and the slave medium 21, and an inner peripheral portion of the slave medium 21 and the master carrier 20 And an elastic inner ring spacer 22 sandwiched between the two.

  The inner peripheral spacer 22 and the outer peripheral spacer 23 are made of, for example, neoprene rubber, and are ring-shaped spacers having a rectangular cross section as shown in the figure. The height is higher than the convex part of the servo pattern 24, and the inner peripheral part spacer 22 and the outer peripheral part spacer 23 having elasticity hold the master carrier rotary shaft holder 25 for holding the master carrier 20 and the slave medium 21. The master medium 20 and the slave medium 21 are aligned by the holder 26 with a slave medium rotating shaft, and contracted to the height of the convex portion of the servo pattern 24 during magnetic transfer. At this time, the air in the space surrounded by the master carrier 20, the slave medium 21, the inner circumferential spacer 22, and the outer circumferential spacer 23 is confined, and a predetermined positive pressure is applied to the inside during magnetic transfer. Yes.

  The force that the master carrier 20 tries to bend into the space is canceled out by the pressure of the air trapped inside, and the slave medium 21 and the master carrier are in areas other than the servo area (not shown) where the servo pattern 24 is provided. In this state, the slave medium 21 and the master carrier 20 are rotated in the rotation direction shown in FIG. C), and the electromagnet 27 (lead wire is not shown) generates an external magnetic field. The servo pattern 24 formed on the surface of the master carrier 20 made of Ni having a thickness of several hundred μm is magnetically applied to the slave medium 21 by moving the outside of the holder with the rotating shaft in the radial direction. Transcript.

Here, the electromagnet 27 may be a permanent magnet. Further, the master carrier 20 and the slave medium 21 may be in the opposite positions. Further, the master carrier 20 and the slave medium 21 may be plural, and the slave medium 21 may have a magnetic recording medium layer on one side or both sides.

  By providing the inner peripheral spacer 22 in addition to the outer peripheral spacer 23, the proximity of the master carrier 20 and the slave medium 21 can be made more stable.

  FIG. 3 shows a third embodiment of the magnetic transfer apparatus according to the present invention. a) The figure shows the main part before the master carrier and the slave medium approach each other, and b) The figure shows a ring-shaped spacer made of an elastic member between the master carrier and the slave medium on the outer periphery of the slave medium. C) In the figure, a master carrier and a slave medium are connected to each other via a ring-shaped outer peripheral spacer and an inner peripheral spacer made of an elastic member. The main part at the time when magnetic transfer is performed by generating a positive pressure in a space surrounded by the master carrier, the slave medium, and the spacer is shown.

  A resilient ring-shaped outer peripheral spacer 33 sandwiched between the outer peripheral portion of the slave medium 31 and the master carrier 30 at the opposing portion of the master carrier 30 and the slave medium 31, and the inner peripheral portion of the slave medium 31 and the master carrier 30 And an elastic ring-shaped inner circumferential spacer 32 sandwiched between the two.

  The inner peripheral spacer 32 and the outer peripheral spacer 33 are made of, for example, neoprene rubber, are ring-shaped spacers having a rectangular cross-sectional shape as shown in the figure, and are provided at positions where the spacers of the master carrier 30 are provided. Is provided with a notch 38 as shown.

  At the initial heights of the inner peripheral spacer 32 and the outer peripheral spacer 33, the convex portions of the servo pattern 34 do not hit the surface of the slave medium 31, and the inner peripheral spacer 32 and the outer peripheral portion having elasticity are provided. The spacer 33 is aligned with the master carrier 30 and the slave medium 31 by the holder 35 with a rotation axis for a master carrier that holds the master carrier 30 and the holder 36 with a rotation axis for a slave medium that holds the slave medium 31. During transfer, the servo pattern 34 is shrunk to the height of the convex portion. At this time, the air in the space surrounded by the master carrier 30, the slave medium 21, the inner peripheral spacer 32, and the outer peripheral spacer 33 is confined, and a predetermined positive pressure is applied to the inside during magnetic transfer. Yes.

  The force that the master carrier 30 tries to bend into the space is canceled by the pressure of the air trapped inside, and the slave medium 31 and the master carrier are in areas other than the servo area (not shown) where the servo pattern 34 is provided. In this state, the slave medium 31 and the master carrier 30 are rotated in the rotation direction shown in FIG. C), and the electromagnet 37 (lead wire is not shown) generates an external magnetic field while the slave medium 31 and the master carrier 30 are rotated. The servo pattern 24 formed on the surface of the master carrier 30 made of Ni having a thickness of several hundred μm is magnetically applied to the slave medium 21 by moving the outside of the holder with the rotation shaft in the radial direction. Transcript.

Here, the electromagnet 37 may be a permanent magnet. Further, the master carrier 30 and the slave medium 31 may be in opposite positions. Further, the master carrier 30 and the slave medium 31 may be plural, and the slave medium 31 may have a magnetic recording medium layer on one side or both sides.

  Since the notch 38 is provided at the position where the spacer of the master carrier 30 is provided, the initial thickness of the spacer can be increased, and a large displacement is set until the master carrier 30 and the slave medium 31 are brought close to each other. Therefore, an accurate positive pressure can be applied to the space formed by the master carrier 30, the slave medium 31, and the elastic ring-shaped inner circumferential spacer 32 and outer circumferential spacer 33.

  FIG. 7 shows a fourth embodiment of the magnetic transfer apparatus according to the present invention. In the figure, the master carrier 70, the slave medium 71 and the ring-shaped inner peripheral spacer 72 and the outer peripheral spacer 73 made of an elastic member are brought close to each other, the master carrier 70, the slave medium 71, the inner peripheral spacer 72, and the outer peripheral portion. Magnetic transfer is performed while generating a positive pressure in the space surrounded by the spacer 73 and maintaining a desired positive pressure from the outside in the space surrounded by the master carrier 70, the slave medium 71, the inner peripheral spacer 72, and the outer peripheral spacer 73. The main part at the time of doing is shown.

  A resilient ring-shaped inner periphery spacer 72 sandwiched between the inner periphery of the slave medium 71 and the master carrier 70 at the opposing portion of the master carrier 70 and the slave medium 71, and the outer periphery of the slave medium 71 and the master carrier 70 And a ring-shaped outer peripheral spacer 73 having elasticity.

  The inner peripheral spacer 72 and the outer peripheral spacer 73 are made of, for example, neoprene rubber, and are ring-shaped spacers having a rectangular cross-sectional shape as shown in the figure, and at positions where the spacers of the master carrier 70 are provided. Is provided with a notch as shown in the figure.

  At the initial heights of the inner peripheral spacer 72 and the outer peripheral spacer 73, the convex portion of the servo pattern 74 does not hit the surface of the slave medium 71, and the inner peripheral spacer 72 and the outer peripheral portion having elasticity are provided. The spacer 73 is aligned with the master carrier 70 and the slave medium 71 by a holder 75 with a master shaft for rotating the shaft that holds the master carrier 70 and a holder 76 with a rotating shaft for the slave medium that holds the slave medium 71. During transfer, the servo pattern 74 is shrunk to the height of the convex portion.

  At this time, the air in the space surrounded by the master carrier 70, the slave medium 71, the inner peripheral spacer 72, and the outer peripheral spacer 73 is trapped, and a predetermined positive pressure is applied to the inside during magnetic transfer. Yes.

  Due to the pressure of the air confined inside, the force that the master carrier 70 tries to bend into the space is canceled out, and the slave medium 71 and the master carrier are in areas other than the servo area (not shown) where the servo pattern 74 is provided. In this state, the slave medium 71 and the master carrier 70 rotate in the rotation direction shown in the drawing, and the electromagnet 77 (lead wire not shown) generates an external magnetic field while the slave medium rotating shaft. By moving the outside of the attached holder 76 in the radial direction, a servo pattern 74 formed on the surface of the master carrier 70 made of Ni having a thickness of several hundred μm is formed on the slave medium 71 in a magnetic manner. Transcript to.

  In the present embodiment, a high-pressure gas jacket 78 is further provided inside the holder 75 with a rotating shaft for the master carrier, and compressed air, nitrogen gas, argon gas, etc. are supplied from, for example, a high-pressure gas cylinder (not shown). In addition, it is possible to inject from a high-pressure gas injection port 78-1 provided inside the shaft of the rotatable master carrier rotation shaft holder 75. From the high-pressure gas jacket 78, a desired gas can be supplied to a space surrounded by the master carrier 70, the slave medium 71, the inner circumferential spacer 72, and the outer circumferential spacer 73 through a pipe penetrating the master carrier 70. ing.

Here, the electromagnet 77 may be a permanent magnet. Further, the master carrier 70 and the slave medium 71 may be in the opposite positions. Further, the master carrier 70 and the slave medium 71 may be plural, and the slave medium 71 may have a magnetic recording medium layer on one side or both sides.

  A pressure gauge 79 is attached to the high-pressure gas jacket 78 so that it can be maintained at an arbitrary pressure by a control unit of a magnetic transfer device (not shown) while checking the pressure. A space surrounded by the master carrier 70, the slave medium 71, the inner peripheral spacer 72, and the outer peripheral spacer 73 can be filled with a desired type of gas with a desired pressure.

  FIG. 8 shows a fifth embodiment of the magnetic transfer apparatus according to the present invention. In the figure, the master carrier 80 and the slave medium 81 are brought close to each other via a ring-shaped inner circumferential spacer 82 and an outer circumferential spacer 83 made of a rigid member, and the master carrier 70, the slave medium 71, the inner circumferential spacer 82, and the outer circumferential portion. The main part at the time of performing magnetic transfer while maintaining a desired positive pressure by supplying a high-pressure gas from the outside to the space surrounded by the spacer 83 is shown.

  The ring-shaped inner peripheral spacer 82 and outer peripheral spacer 83 made of a rigid member are made of, for example, Ni or stainless steel, and have a thickness equal to the height of the convex portion of the servo pattern 84 provided on the master carrier 80. The ring-shaped spacer having a flat rectangular cross section is provided at one location near the inner circumference of the slave medium 81 and at one location near the outer circumference of the slave medium 81. The master carrier 80 and the slave medium 81 are close to each other, and supplied to the space surrounded by the master carrier 80, the slave medium 81, the inner peripheral spacer 82, and the outer peripheral spacer 83 from the outside, for example, by a high pressure argon gas cylinder. By generating a positive pressure of 10 to several 100 atm, a large positive pressure is generated in the space surrounded by the master carrier 80, the slave medium 81, the inner peripheral spacer 82, and the outer peripheral spacer 83, and the master carrier 80 and the slave medium 81 can be made more difficult to contact in an area other than the servo area.

  A high-pressure gas jacket 88 is provided inside the holder 85 with a rotation shaft for the master carrier, and the rotation for the master carrier that can rotate compressed air, nitrogen gas, argon gas, etc., from a high-pressure gas cylinder (not shown), for example. It can inject | pour from the high pressure gas injection port 88-1 provided in the inside of the axis | shaft of the holder 85 with a axis | shaft. From the high pressure gas jacket 88, a desired gas can be supplied to a space surrounded by the master carrier 80, the slave medium 81, the inner circumferential spacer 82, and the outer circumferential spacer 83 through a pipe penetrating the master carrier 80. ing.

Here, the electromagnet 87 may be a permanent magnet. In addition, the master carrier 80 and the slave medium 81 may be in the opposite positions. Furthermore, the master carrier 80 and the slave medium 81 may be plural, and the slave medium 81 may have a magnetic recording medium layer on one side or both sides.

  A pressure gauge 89 is attached to the high pressure gas jacket 88 so that the pressure can be kept at an arbitrary pressure by a control unit of a magnetic transfer device (not shown) while checking the pressure. A space surrounded by the master carrier 80, the slave medium 81, the inner peripheral spacer 82, and the outer peripheral spacer 83 can be filled with a desired type of gas with a desired pressure.

First embodiment of a magnetic transfer apparatus according to the present invention Second embodiment of a magnetic transfer apparatus according to the present invention Third embodiment of a magnetic transfer apparatus according to the present invention An example of a master carrier for magnetic transfer Example of conventional magnetic transfer device Detailed view of an example of a conventional magnetic transfer device Fourth embodiment of a magnetic transfer apparatus according to the present invention Fifth embodiment of a magnetic transfer apparatus according to the present invention

Explanation of symbols

10, 20, 30, 40, 50, 60, 70, 80 Master carrier 11, 21, 31, 51, 61, 71, 81 Slave medium 22, 32, 72, 82 Inner peripheral spacer 13, 23, 33, 73 83 Peripheral spacer 14, 24, 34, 54, 64, 74, 84 Servo pattern 15, 25, 35, 55, 65, 75, 85 Master carrier holder with rotating shaft 16, 26, 36, 56, 66, 76, 86 Holder with rotation axis for slave medium 17, 27, 37, 57, 77, 87 Electromagnet 41 Servo area 42 Servo pattern 43 Data area 44 Magnetic head 45 Rotary type positioner 52 Inner peripheral protrusion 53 Outer peripheral protrusion 67 Central axis 78, 88 High pressure gas jacket 79, 89 Pressure gauge

Claims (5)

In a magnetic transfer apparatus using a master carrier for magnetic transfer,
A ring-shaped spacer made of an elastic member sandwiched between at least an outer peripheral portion of the slave medium and the master carrier at a facing portion between the master carrier and the slave medium;
Pressurization that generates positive pressure in the space surrounded by the master carrier, the slave medium, and the spacer by pressurizing the master carrier and the slave medium through the spacer in a direction in which the spacer is compressed. And a magnetic transfer device.   2. The magnetic transfer apparatus according to claim 1, further comprising a pressurizing unit that fills the pressurized gas in the space surrounded by the master carrier, the slave medium, and the spacer to generate a positive pressure. . In a magnetic transfer apparatus using a master carrier for magnetic transfer,
A ring-shaped spacer made of a rigid member sandwiched between at least an outer peripheral portion of the slave medium and the master carrier at a facing portion between the master carrier and the slave medium;
The master carrier and the slave medium are brought close to each other in the direction in which the spacer is compressed through the spacer, and a space surrounded by the master carrier, the slave medium, and the spacer is filled with a pressurized gas to have a positive pressure. A magnetic transfer apparatus comprising a pressurizing means for generating the magnetic transfer apparatus.   A magnetic disk medium manufactured using the magnetic transfer apparatus according to claim 1. A magnetic disk device having the magnetic disk medium.

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