JPH07254140A - Magnetic recording medium for transfer and transfer method - Google Patents

Abstract

PURPOSE:To make mass production of software at a low cost by making the inclination of the columns in magnetic films larger toward upper layers from the lower layer side near a base. CONSTITUTION:Information signals are recorded by ordinary means on a mother tape 11 having the inclination theta1 of the columns in the magnetic metallic film 12. These recording signals are copied on the magnetic metallic layer of a blank tape 13 at the inclination theta2 satisfying theta2<theta1. The transfer is executed by superposing the mother tape 11 and the blank tape 13 in such a manner that the growth direction M the columns in the magnetic metallic film 12 of the mother tape 11 and the growth direction 14B of the columns in the magnetic metallic film 141 of the uppermost layer of the blank tape 13 intersect with each other and that the magnetic metallic films 12 and 141 come into contact with each other. The mother tape 11 and the blank tape 13 are mounted at a magnetic transfer device and a bias magnetic field is impressed thereto from the base side of the blank tape 13 by a ring type magnetic head 15, by which the recording information signals of the mother tape 11 are transferred to the blank tape 13. Since the copying of the information signals is transfer, the high-speed copying is executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer technique used for recording an information signal of a mother tape on a blank tape.

[0002]

BACKGROUND OF THE INVENTION Conventionally, an information signal of a first magnetic recording medium (also called a mother tape or a master tape) is recorded at a high speed on a second magnetic recording medium (also called a blank tape or a slave tape). A magnetic transfer technique has been proposed as a means for achieving this. For example, Japanese Patent Laid-Open No. 4-16
As disclosed in Japanese Patent No. 3722, an external bias magnetic field is applied to a mother tape of a metal vapor deposition thin film type mother tape and a metal vapor deposition thin film type blank tape in such a manner that their columns are tilted in opposite directions. In the magnetic transfer method of transferring the recording magnetization of No. 1 to the blank tape, the external bias magnetic field is 110 ° ± from the in-plane direction of the mother tape for which the easy axis of magnetization is selected to be 20 ° ± 15 ° from the in-plane direction. A magnetic transfer method has been proposed which is characterized by applying in the direction of 15 °.

According to such a magnetic transfer system, the magnetic transfer efficiency is improved, demagnetization is small, and
It is said that the mother tape does not require a large coercive force and a good transfer output can be obtained.

[0004]

DISCLOSURE OF THE INVENTION The proposed technique is proposed by considering the relationship between the easy axis of magnetization of the mother tape and the direction of the external bias magnetic field, and it has its own characteristics. However, there is no consideration for the tilt of the column of magnetic particles in the metal evaporated thin film type mother tape and the metal evaporated thin film type blank tape,
It was unknown to anyone that the magnetic transfer efficiency was significantly affected by the relationship between the tilts of both columns.

That is, hitherto, the relationship between the column inclination of magnetic particles in a metal thin film type mother tape and the column inclination of magnetic particles in a metal thin film type blank tape has a great influence on the magnetic transfer efficiency. Although not even suggested to give, as a result of intensive research conducted by the present inventor, it was found that a good transfer output can be obtained when the tilt of the column satisfies a specific condition. Has come.

The present invention has been achieved on the basis of such knowledge, and an object of the present invention is to provide a copying technique of an information signal which can obtain a good output. Another object of the present invention is to provide a technique for copying an information signal in which the demagnetization of the mother tape is small and a good output can be obtained. An object of the present invention is a metal thin film type magnetic recording medium used for transfer of information signals, wherein the magnetic recording medium is provided with two or more layers of metal magnetic thin films in which columns are obliquely grown, This is achieved by a magnetic recording medium for transfer, characterized in that the inclination θ of the column in the magnetic film is configured so as to increase from the lower layer side close to the support to the upper layer side.

Further, the first magnetic recording medium is a second magnetic recording medium to which the information signal recorded in the first magnetic recording medium is transferred, and the columns in the magnetic film of the first magnetic recording medium grow obliquely. In the second magnetic recording medium, the column in the magnetic film is provided with two or more layers of the metal magnetic thin film grown obliquely, and the column in the magnetic film is The inclination of the column in the magnetic film of the first magnetic recording medium is larger than that of the uppermost layer of the second magnetic recording medium. This is achieved by a magnetic recording medium for transfer, characterized in that it is constructed so as to be larger than the inclination θ ₁ of the column in the magnetic film.

A method of transferring an information signal recorded on a first magnetic recording medium to a second magnetic recording medium, wherein the columns of the magnetic film of the first magnetic recording medium are slanted. The second magnetic recording medium is a grown metal thin film type, wherein the column in the magnetic film is provided with two or more layers of the metal magnetic thin film grown obliquely, and the column in the magnetic film. Of the magnetic field of the magnetic layer of the first magnetic recording medium, the inclination θ of the column in the magnetic layer of the first magnetic recording medium is the uppermost layer of the second magnetic recording medium. of the magnetic film becomes configured larger as than the slope theta ₁ column in, color in the top layer of the magnetic film of the first column in the magnetic layer of the magnetic recording medium of the growth direction second magnetic recording medium So that between the growth direction intersect,
In addition, the transfer method is characterized in that the magnetic films are superposed so as to be positioned inside and a bias magnetic field is applied from the side of the second magnetic recording medium.

[0009] Incidentally, in the above invention, the inclination theta _n columns in closest lowermost magnetic layer to the support of the second magnetic recording medium is 5 to 45 °, magnetic farthest uppermost layer from the support It was more preferable that the inclination θ ₁ of the column in the membrane was 25 to 90 °. That is, by satisfying the above conditions, demagnetization was further reduced, and good output was obtained.

Further, the column growth direction in the magnetic film of the first magnetic recording medium and the column growth direction in the uppermost magnetic film of the second magnetic recording medium intersect, and
The first magnetic recording medium and the second magnetic recording medium, which are superposed so that the magnetic films are located inside, are arranged so that the first magnetic recording medium is located on the guide means side made of a soft magnetic material, It is preferable to apply a bias magnetic field from the side of the second magnetic recording medium opposite to the guide means. That is, by doing so, a better output was obtained.

The bias magnetic field applied when transferring the information signal recorded on the first magnetic recording medium to the second magnetic recording medium is preferably a ring type magnetic head. Hereinafter, the present invention will be described in more detail. The support used in the magnetic recording medium (first magnetic recording medium and second magnetic recording medium) of the present invention is a non-magnetic one, and such a support may be polyester such as PET, polyamide, polyimide or poly. Olefin resins such as sulfone, polycarbonate and polypropylene, cellulose resins, organic materials such as vinyl chloride resins, ceramics such as glass, and other metal materials such as aluminum alloys are used. An undercoat layer for improving the adhesion of the magnetic layer (magnetic thin film) is provided on the surface of the support. That is, by appropriately roughening the surface roughness, for example, the adhesion of the magnetic thin film formed by the oblique deposition method is improved, and the surface roughness of the metal magnetic thin film surface is moderated to improve the running property. Therefore, for example, the thickness containing particles such as SiO ₂ is 0.005 to
The undercoat layer is formed by providing a coating film of 0.5 μm.

A magnetic thin film is provided on one surface of such a support by, for example, oblique vapor deposition means. Examples of the material of the magnetic particles forming the metal magnetic thin film include Fe and C
In addition to metals such as o and Ni, Co-Ni alloys, Co-Pt
Alloy, Co-Ni-Pt alloy, Fe-Co alloy, Fe-
A Ni alloy, an Fe-Co-Ni alloy, an Fe-Co-B alloy, a Co-Ni-Fe-B alloy, a Co-Cr alloy, or those containing a metal such as Al is used. Also, Fe-N alloy, Fe-N-O alloy, Fe-C
Alloys, Fe-C-O alloys, etc. are also used. Incidentally, it is preferable that an oxidizing gas is supplied when the metal magnetic thin film is formed, and a protective layer made of an oxide film is formed on the surface layer of the metal magnetic thin film. Further, it is more preferable that diamond-like carbon, boron carbide, silicon nitride, or the like is further provided as the protective layer. Further, it is preferable to provide a fluorine-based or carbon-based lubricant on the upper layer of the protective layer.

Forming a magnetic metal thin film by oblique vapor deposition means
As an apparatus for performing the operation, an oblique vapor deposition apparatus as shown in FIG.
Can be adopted. In FIG. 1, 1a is a non-magnetic support
Supply-side roll of the body 2, 1b is a winding side of the non-magnetic support 2
Rolls 3, cooling can rolls, 4 supply side rolls 1a
Installed in the traveling path of the support 2 between the cooling can roll 3 and
Eclipsed guide roller, 5 crucible, 6 electron gun, 7
It is a magnetic metal. Then, with such an oblique vapor deposition apparatus
When making a second magnetic recording medium (blank tape)
In that case, first, magnetic metal is obliquely vapor-deposited on the support 2,
The inclination of the column of deposited magnetic particles is θ_nMetal magnetic thin film
To provide. Next, the tilt of the column of the magnetic particles is θ_nof
The support provided with the metal magnetic thin film is attached to the supply side in FIG.
The roll is loaded, and the position of the guide roller 4 is set to the above.
Change setting (θ_n<Θ_n-1Change settings to
Then, magnetic metal is obliquely vapor-deposited and deposited in the same manner as above.
The tilt of the column of magnetic particles is θ_n-1(Θ_n<Θ _n-1)of
Provide a metal magnetic thin film. Do the same for the magnetic metal
The inclination of the column of magnetic particles deposited on the top layer is
θ₁By providing the metal magnetic thin film of
From the bottom to θ_n, Θ_n-1, ……, θ₁(N is 2 or more
The integer of θ_n<Θ_n-1<…… <θ₁) N-layer metal magnet
A magnetic recording medium having a transparent film provided on a support 2 is obtained.
It

Alternatively, it is possible to successively provide magnetic films in order with one device. That is, it is possible to employ an oblique vapor deposition apparatus as shown in FIG. Note that FIG. 2 shows a case where the metal magnetic film provided on the support 2 has two layers. In FIG. 2, 1a is a supply side roll of the non-magnetic support 2 and 1b is a winding side roll of the non-magnetic support 2 3 ₁ , 3
Reference numeral ₂ is a cooling can roll, 4 is a guide roller provided on the traveling path of the support 2 between the supply side roll 1a and the cooling can roll 3 ₂ , 5 ₁ and 5 ₂ are crucibles, and 6 ₁ and 6 ₂ are electronic. A gun, 7 is a magnetic metal, 8 is a partition plate, and 9 ₁ and 9 ₂ are oxygen gas supply nozzles. When the second magnetic recording medium (blank tape) is produced by such an oblique vapor deposition apparatus, first, the magnetic metal is obliquely vapor-deposited on the support ₂ on the cooling can roll 3 ₂ to deposit the magnetic metal. A metal magnetic thin film having a particle column inclination of θ ₂ is provided, and thereafter, a magnetic metal is obliquely vapor-deposited on the metal magnetic thin film on the support 2 on the cooling can roll 3 ₁ , and the column inclination of the deposited magnetic particles is set. Is provided with a metal magnetic thin film of θ ₁ . The two-layer metal magnetic thin film obtained in this manner was used in the crucible 5
_Since the angle of the traveling direction of the support 2 with respect to the particles coming from ₁ , 5 ₂ is larger at the beginning, the relationship of the column inclination of the magnetic particles is θ ₂ <θ ₁ .

If the concept of FIG. 2 is developed, that is, cooling can rolls and crucibles are prepared according to the number of layers to be deposited, and the direction of travel of the support with respect to the particles flying from each crucible is determined. If the angles are adjusted in order, the tilt of the column will be θ _n , θ _n-1 , ..., θ in order from the bottom.
A magnetic recording medium is obtained in which an n-layer metal magnetic film of ₁ (n is an integer of 2 or more, θ _n <θ _n-1 <... <θ ₁ ) is provided on the support 2.

Since each cooling can roll and the guide roller 4 are constructed so that their positions can be displaced, the column inclination θ _k of the magnetic particles deposited by oblique vapor deposition can be adjusted. The first magnetic recording medium (mother tape) can be produced by the oblique vapor deposition apparatus shown in FIG. That is, when the mother tape was manufactured, the crucible so that the column inclination θ of the magnetic particles of the magnetic metal film of the mother tape was larger than the inclination θ ₁ of the column of the magnetic particles of the uppermost metal magnetic film of the blank tape. It suffices to note that it is necessary to set the angle of the traveling direction of the support 2 with respect to the particles flying from the No. 5, and in this way the blank tape can be produced in the same manner.

That is, in the apparatus shown in FIG. 1, when the guide roller 4 is placed at the position B to form the uppermost metal magnetic film of the blank tape, the guide roller 4 is placed at the position A (position B). The mother tape is produced by placing the support tape 2 on the right side, that is, the angle at which the standing angle of the support body 2 from the guide roller 4 to the cooling can roll 3 is small with respect to the particles flying from the crucible 5 on the lower side. If
Each of the tapes is a metal thin film type in which the column in the magnetic film is obliquely grown, and the tape satisfying the column inclination θ _n <θ _n-1 <... <θ ₁ <θ in the metal magnetic film. can get.

3 and 4 are schematic views of the mother tape and the blank tape (the same applies when the metal magnetic film has two layers or three or more layers) thus obtained. An information signal is recorded on the mother tape having a column inclination of θ in the metal magnetic film by a conventional means. Then, the recording information signal of this mother tape is magnetically transferred onto a blank tape having a plurality of layers of metal magnetic films satisfying the relationship of the column inclination θ _n <θ _n-1 <... <θ ₁ in the metal magnetic film. Copied.

This copy is shown in FIGS. 5 and 6.
Is done. First, as shown in FIG. 5, a mother tape
11, the growth direction 12 of the column in the metal magnetic film 12_M
And the metal magnetic film 14 on the uppermost layer of the blank tape 13₁To
Column growth direction 14_BSo that and intersect, and
Metal magnetic film 12 and metal magnetic film 14 ₁To come into contact with
Overlap.

Then, the mother tape 11 and the blank tape 13 are mounted on the magnetic transfer device of FIG. 6 so that the relationship shown in FIG. 5 is satisfied. Then, a bias magnetic field is applied from the support side of the blank tape 13 by the ring type magnetic head 15, and the recording information signal of the mother tape 11 is transferred to the blank tape 13. In FIG. 6, 11a is the reel on the supply side of the mother tape 11, and 11b is the mother tape 1.
1 take-up reel, 13a supply reel of blank tape 13, 13b take-up reel of blank tape 13, 16 and 17 guide rollers, 18 transfer made of soft magnetic material (for example, permalloy) It's a drum.

When the information signal is copied as described above, since it is a transfer, a high-speed copy is possible,
Then, in the blank tape, the bias magnetic field is applied in the easy magnetization direction, so that the information signal is efficiently copied. In the mother tape, the bias magnetic field is applied in the difficult magnetization axis direction, and thus demagnetization is hard to occur. The information signal can be copied repeatedly and accurately.

The present invention will be described below with reference to specific examples.

[0023]

【Example】

[Embodiment 1] FIGS. 1 to 6 are for explaining one embodiment of the present invention, and FIG. 1 is a schematic view of an oblique vapor deposition apparatus for manufacturing a first magnetic recording medium (mother tape). FIG. 2, FIG. 2 is a schematic view of an oblique vapor deposition apparatus for manufacturing a second magnetic recording medium (blank tape), FIG. 3 is a schematic sectional view of a mother tape, FIG. 4 is a schematic sectional view of a blank tape, and FIG. FIG. 6 is a schematic side view showing the relationship between the mother tape and the blank tape at the time of transfer, and FIG. 6 is a schematic view of the transfer device.

First, as shown in FIG. 1, a non-magnetic support (PET film) 2 is bridged between a supply side roll 1a and a winding side roll 1b, and then run along a cooling can roll 3. Then, the guide roller 4 is set to the position shown by the solid line, and the inside of the vacuum container is set to 10 ^-4 to 10 ^-6.
After evacuation to a vacuum degree of about Torr, the magnetic metal (C) in the crucible 5 is heated by electron beam heating from the electron gun 6.
o) 7 is melted and evaporated, and 0.28 Co particles are added to the PET film 2 attached to the cooling can roll 3.
A metal thin film type mother tape 11 was obtained by vapor deposition to a thickness of μm.

The mother tape 11 thus obtained has a column structure as shown in FIG. 3, and the column inclination θ is 60 ° and Hc is 1680O.
e and Bs were 6200 G, Br / Bs was 0.81, and the center line average roughness Ra of the surface of the metal magnetic film 12 was 1.2 nm. Further, as shown in FIG. 2, a non-magnetic support (PET film) 2 is laid between the supply side roll 1a and the winding side roll 1b, and the guide roller 4 and the cooling can rolls 3 ₂ and 3 ₁ are attached. Set to the position shown by the solid line, and follow the guide roller 4 and the cooling can rolls 3 ₂ and 3 ₁ to PET.
The film 2 is run.

Then, the inside of the vacuum vessel is 10 ⁻⁴ to 10 ⁻⁶ To.
After evacuating to that of rr a vacuum of about magnetic metal of the crucible 5 in ₂ by the electron beam heating of the electron gun 6 ₂ (Co
-Ni (80-20) alloy) 7 melt, evaporated, 0.12 .mu.m was deposited thickness of Co-Ni particles with respect to the cooling can roll 3 ₂ PET film 2 being spliced, the lower metal magnetic film 14 ₂ constitutes a, and subsequently the magnetic metal (Co-Ni (80-20) alloy) in the crucible 5 ₁ by an electron beam heating of the electron gun 6 ₁ 7 melt, evaporated, the cooling can roll 3 ₁ the Co-Ni particles deposited 0.08μm thickness constitutes the upper metal magnetic film 14 ₁ on the lower metal magnetic film 14 ₂ of the PET film 2 being spliced, the two-layer metal thin film type blank tape 13 Got

The blank tape 13 thus obtained has a column structure as shown in FIG. 4, and the column inclination θ ₂ is 30 ° and θ ₁ is 45 °.
Hc is 1140Oe, Bs is 4300G, Br / Bs is 0.79, the center line average roughness Ra of the metal magnetic layer 14 _first surface
Was 2.1 nm. Then, as shown in FIG. 5, the column growth direction 12 _M in the metal magnetic film 12 of the mother tape 11 and the metal magnetic film 14 ₁ of the blank tape 13 are increased.
In such a manner that the metal magnetic film 12 and the metal magnetic film 14 ₁ are overlapped so as to intersect the column growth direction 14 _{B in} FIG. The mother tape 11 and the blank tape 13 are arranged for the head 18, and a bias magnetic field is applied from the support side of the blank tape 13 by the ring type magnetic head 15 to transfer the recording information signal of the mother tape 11 to the blank tape 13. did.

[Embodiment 2] In Embodiment 1, the column inclination is θ ₂ = 15 °, θ ₁ = 30 °, and Hc = 1180O.
e, Bs = 4700G, Br / Bs = 0.82, Ra =
Magnetic metal (Co-Ni (80: 2
0)) was deposited to produce a blank tape 13.

Then, the recording information signal of the mother tape 11 of Example 1 was transferred to the blank tape 13 of this example. [Third Embodiment] In the first embodiment, the column inclination θ ₂ = 1.
0 °, θ ₁ = 60 °, Hc = 1000 Oe, Bs = 46
A blank tape 13 was prepared by depositing a magnetic metal (Co—Ni (80:20)) so that 00G, Br / Bs = 0.73, and Ra = 2.3 nm.

Then, the recording information signal of the mother tape 11 of Example 1 was transferred to the blank tape 13 of this example. [Example 4] In Example 1, the inclination of the column θ ₂ = 4.
5 °, θ ₁ = 90 °, Hc = 940 Oe, Bs = 420
A blank tape 13 was prepared by depositing a magnetic metal (Co—Ni (80:20)) so that 0 G, Br / Bs = 0.66, and Ra = 2.2 nm.

Then, the description of the mother tape 11 of the first embodiment is given.
Transfer the recording information signal to the blank tape 13 of this embodiment.
It was [Fifth Embodiment] In the first embodiment, the column inclination θ = 45.
°, Hc = 1760 Oe, Bs = 7200G, Br / B
Magnetic metal so that s = 0.84 and Ra = 1.3 nm
(Co) is deposited to produce the mother tape 11, and
Column tilt θ₂= 10 °, θ ₁= 40 °, Hc = 10
30 Oe, Bs = 4300G, Br / Bs = 0.75,
Magnetic metal (Co-Ni (8
0:20)) is deposited to make a blank tape 13.
It was

Then, using these tapes, Example 1
Similarly to the above, the recording information signal of the mother tape 11 was transferred to the blank tape 13. Comparative Example 1 The same mother tape 11 and blank tape 13 as in Example 1 were prepared, and as shown in FIG. 5, the column growth direction 12 _M in the metal magnetic film 12 of the mother tape 11 and the metal magnetic property of the blank tape 13 were set. So that the column growth direction 14 _B in the film 14 ₁ intersects, and
The metal magnetic film 12 and the metal magnetic film 14 ₁ are superposed so as to be in contact with each other, and the ring type magnetic head 15 is attached to the mother tape
The recording tape was disposed on the first side, and a bias magnetic field was applied from the support side of the mother tape 11 to transfer the recording information signal of the mother tape 11 to the blank tape 13.

[Comparative Example 2] In Example 1, the inclination of the column was θ ₂ = 45 °, θ ₁ = 30 °, and Hc = 1080O.
e, Bs = 4300G, Br / Bs = 0.77, Ra =
Magnetic metal (Co-Ni (80: 2
0)) was deposited to make a blank tape.

Then, using this blank tape, the recording information signal of the mother tape 11 was transferred to the blank tape in the same manner as in Example 1. [Comparative Example 3] In Example 1, the column inclination θ = 30.
°, Hc = 1710 Oe, Bs = 7300G, Br / B
A magnetic metal (Co) was deposited so that s = 0.85 and Ra = 1.2 nm to prepare a mother tape.

Using this mother tape, the information signal recorded on this mother tape was transferred to the blank tape 13 obtained in Example 1 in the same manner as in Example 1. [Characteristics] The transfer from the mother tape to the blank tape in each of the above examples was repeated 5000 times, and the output reduction of the mother tape and the reproduction output of the blank tape at that time were measured using a commercially available high band 8mm VTR modified deck. The results are shown in Table 1 below.

Table-1 Output reduction of mother tape Reproduction output of blank tape (dB) 1 MHz (dB) 7 MHz (dB) Example 1 1.8 -1.6 -1.1 Example 2 1.8 -1. 0-2.1 Example 3 1.9-1.9-0.9 Example 4 2.1-2.3-0.8 Example 5 2.5-1.5-1.3 Comparative Example 1 3.6-1.8-1.2 Comparative Example 2 2.1-3.4-2.0 Comparative Example 3 3.2-2.1-1.5 * Head to Head commercially available high band vapor deposition. The output recorded and reproduced on the tape is 0.
Is less likely to be demagnetized, and copying on the blank tape 13 having high reproduction output is possible, and high-speed copying is possible, so that mass production of software can be performed at low cost. .

[0037]

According to the present invention, mass production of software can be performed at low cost.

[Brief description of drawings]

FIG. 1 is a schematic view of an oblique vapor deposition apparatus for manufacturing a mother tape and a blank tape.

FIG. 2 is a schematic view of an oblique vapor deposition apparatus for manufacturing a blank tape.

FIG. 3 is a schematic sectional view of a mother tape.

FIG. 4 is a schematic sectional view of a blank tape.

FIG. 5 is a schematic side view showing the relationship between a mother tape and a blank tape during transfer.

FIG. 6 is a schematic diagram of a transfer device.

[Explanation of symbols]

1a supply roll 1b winding-side roller 2 supports 3, 3 _1, 3 ₂ cooling can roll 4 guide rollers 5, 5 _1, 5 ₂ crucible 7 magnetic metal 11 mother tape 12 metal magnetic layer 13 blank tapes 14 _1, 14 Metal magnetic film 15 Ring type magnetic head 18 Transfer drum

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shigemi Wakabayashi Inventor Shigemi Wakabayashi 2606 Akabane, Kaiga-cho, Haga-gun, Tochigi Kao Co., Ltd.Institute of Information Science (72) Inventor Akira Shiga 2606 Akabane, Kaiga-cho, Haga-gun, Tochigi Kao Company Information Science Laboratory

Claims (6)

[Claims] 1. A metal thin film type magnetic recording medium used for transferring an information signal, wherein the magnetic recording medium is provided with two or more layers of metal magnetic thin films in which columns are obliquely grown. A magnetic recording medium for transfer characterized in that the inclination θ of the column in the film is configured to increase as it moves from the lower layer side near the support to the upper layer. 2. A second magnetic recording medium to which an information signal recorded in the first magnetic recording medium is transferred, wherein the first magnetic recording medium has columns in its magnetic film grown obliquely. In the second magnetic recording medium, the column in the magnetic film is provided with two or more layers of the metal magnetic thin film grown obliquely, and the column in the magnetic film is The inclination of the column in the magnetic film of the first magnetic recording medium is larger than that of the uppermost layer of the second magnetic recording medium. A magnetic recording medium for transfer, wherein the magnetic recording medium is constructed so as to have a tilt larger than θ ₁ of the column in the magnetic film. 3. The column inclination θ _n of the lowermost magnetic film closest to the support is 5 to 45 °, and the column inclination θ ₁ of the uppermost magnetic film farthest from the support is 25 to 90.
The magnetic recording medium for transfer according to claim 1 or 2, wherein 4. A method for transferring an information signal recorded on a first magnetic recording medium to a second magnetic recording medium, wherein the first magnetic recording medium has a column in its magnetic film inclined. The second magnetic recording medium is a grown metal thin film type, in which the column in the magnetic film is provided with two or more layers of the metal magnetic thin film grown obliquely, and the column in the magnetic film. Of the column becomes larger from the lower layer side closer to the support to the upper layer, and the column inclination θ in the magnetic film of the first magnetic recording medium is the uppermost layer of the second magnetic recording medium. of the magnetic film becomes configured larger as than the slope theta ₁ column in, color in the top layer of the magnetic film of the first column in the magnetic layer of the magnetic recording medium of the growth direction second magnetic recording medium As the growth direction intersect, and transfer method magnetic film each other overlay to be located inside, and applying a bias magnetic field from the side of the second magnetic recording medium. 5. The magnetic film of the first magnetic recording medium has a column growth direction intersecting with the column growth direction of the uppermost magnetic film of the second magnetic recording medium, and the magnetic films are inside each other. The first magnetic recording medium and the second magnetic recording medium, which are superposed so as to be located at, are arranged so that the first magnetic recording medium is located on the guide means side made of a soft magnetic material. 5. A bias magnetic field is applied from the opposite side of the second magnetic recording medium.
Transfer method. 6. A bias magnetic field is applied by a ring type magnetic head, as claimed in claim 4 or claim 5.
Transfer method.