专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2001143257A MAGNETIC TRANSFER METHOD 失效
公开(公告)号：JP2001143257A
公开(公告)日：2001-05-25
申请号：JP31996199
申请日：1999-11-10
申请人： FUJI PHOTO FILM CO LTD , SUGITA RYUJI
发明人： NISHIKAWA SHOICHI , SUGITA RYUJI , NAGAO MAKOTO
IPC分类号： G11B5/86
摘要： PROBLEM TO BE SOLVED: To transfer a transfer pattern of high quality from a master carrier to a slave medium by magnetic transfer. SOLUTION: The master carrier for magnetic transfer where a magnetic layer is formed in a part corresponding to an information signal on the surface of a substrate and a magnetic recording medium as the slave to which the pattern is to be transferred are used, and the slave medium is preliminarily initially magnetized by DC in a certain direction, and the master carrier for magnetic transfer and the slave medium initially magnetized by DC are brought into close contact with each other, and a magnetic field for transfer is applied in a certain direction opposite to the direction of initial DC magnetization on the slave surface to perform magnetic transfer. In this case, a width Wm of the magnetic layer formed on the master carrier and a width Ws of magnetization on the magnetic layer of the slave medium after magnetic transfer are within a range of 0.04

2. 发明专利

JP2000195047A MASTER CARRIER FOR MAGNETIC TRANSFER 失效
公开(公告)号：JP2000195047A
公开(公告)日：2000-07-14
申请号：JP33802099
申请日：1999-11-29
申请人： FUJI PHOTO FILM CO LTD , SUGITA RYUJI
发明人： NAGAO MAKOTO
IPC分类号： G11B5/86
摘要： PROBLEM TO BE SOLVED: To realize stable transfer of pre-format recording in many times in the higher accuracy by providing, on a substrate, a plurality of transfer information recording parts consisting of projected ferro-magnetic material depending on the recording information for transfer and forming a conductive layer between the transfer information recording part and substrate. SOLUTION: A conductive layer 10 is formed on a master carrier 1 for magnetic transfer and a transfer information recording part 10 consisting of a ferro- magnetic material depending on a pre-format is formed on this conductive layer. A precise pre-format of the slave medium is performed by energizing the transfer information recording part 11 by placing in contact the master carrier for magnetic transfer with a slave medium 5 or by impressing the energizing filed 6 such as an AC bias magnetic field or DC magnetic field. Here, when the master carrier for magnetic transfer is placed in contact with the slave medium, it is preferable that the transfer information recording part 11 has sufficient hardness of 10 Gpa or more.

3. 发明专利

JP2000331341A MAGNETIC TRANSFERRING METHOD 失效
公开(公告)号：JP2000331341A
公开(公告)日：2000-11-30
申请号：JP34020699
申请日：1999-11-30
申请人： FUJI PHOTO FILM CO LTD , SUGITA RYUJI
发明人： NAGAO MAKOTO , KATAYAMA KAZUTOSHI , NISHIKAWA SHOICHI , SUGITA RYUJI
IPC分类号： G11B5/72 , G11B5/65 , G11B5/738 , G11B5/86
摘要： PROBLEM TO BE SOLVED: To enable a slave medium having a transfer pattern of high quality by preparing a non-magnetic material part divided in the nearly same plane as a transfer information recording part between the plural transfer information recording parts of a ferromagnetic body according to transfer recording information. SOLUTION: Plural transfer information recording parts 10 of a ferromagnetic body according to a pre-format are provided in a magnetic transfer master carrier 1, and further a non-magnetic part 11 is provided between the adjacent transfer information recording parts 10 as the substantially same plane having projecting and recessing parts of 30 nm or less. And the cross section shape in the direction of a track perpendicular to the surface of the carrier 1 is formed into a rectangle and the boundary with the non-magnetic part 11 is divided by the surface perpendicular to the surface of the carrier 1, whereby a transfer magnetic field formed in the slave medium 5 is prevented from chipping off of an information recording area corner part and from chipping off of recording and a pre-format of high precision is formed. Also, the carrier 1 is brought into close contact with the slave medium 5 and an exciting magnetic field 6 such as a DC magnetic field is impressed to energize the transfer recording part 10, whereby a precise pre-format in the slave medium 5 is executed.

4. 发明专利

JP2001143258A MAGNETIC TRANSFER METHOD 失效
公开(公告)号：JP2001143258A
公开(公告)日：2001-05-25
申请号：JP31996299
申请日：1999-11-10
申请人： FUJI PHOTO FILM CO LTD , SUGITA RYUJI
发明人： NISHIKAWA SHOICHI , SUGITA RYUJI , NAGAO MAKOTO
IPC分类号： G11B5/86
摘要： PROBLEM TO BE SOLVED: To transfer a transfer pattern of high quality from a master carrier to a slave medium by magnetic transfer. SOLUTION: The master carrier for magnetic transfer where a magnetic layer is formed in a part corresponding to an information signal on the surface of a substrate and the slave medium to which the pattern is to be transferred are used, and the slave medium is preliminarily initially magnetized by DC in a track direction, and the master carrier for magnetic transfer and the slave medium initially magnetized by DC are brought into close contact with each other, and a magnetic field for transfer is applied in a track direction opposite to the direction of initial DC magnetization on the slave surface to perform magnetic transfer. In this case, a width Wm of the magnetic layer formed on the master carrier and a width Ws of magnetization on the magnetic layer of the slave medium after magnetic transfer are within a range of 1.02

5. 发明专利

JP2000222727A MASTER CARRIER FOR MAGNETIC TRANSFER AND MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JP2000222727A
公开(公告)日：2000-08-11
申请号：JP2487399
申请日：1999-02-02
申请人： FUJI PHOTO FILM CO LTD , SUGITA RYUJI
发明人： NAGAO MAKOTO , SUGITA RYUJI
IPC分类号： G11B5/86
摘要： PROBLEM TO BE SOLVED: To prevent the servo operation of a slave medium from becoming inaccurate by forming the shapes of transfer patterns at foremost and rearmost parts of the preformat pattern to the prescribed shapes. SOLUTION: End surfaces of respective end parts of the patterns, positioned at both end parts in the tracking direction of patterns in the preformat region 2, that is, the foremost pattern 8 and the rearmost pattern 9, are inclined outward from the vertical line of the tracking direction. By this arrangement, the magnetic fields at the end parts of the preformat pattern region are formed in the direction oblique to the tracking direction at the time of transfer from the master carrier for magnetic transfer. The patterns at both end parts transferred to the slave are also deviated by the inclined angle θ accordingly. As the result, even though the undesirable magnetic information is generated from the end part of the preformat region, the influence to the actual servo operation is eliminated since the reproduced signal due to this information is further weakened.

6. 发明专利

JP2001155336A MASTER CARRIER FOR MAGNETIC TRANSFER 失效
公开(公告)号：JP2001155336A
公开(公告)日：2001-06-08
申请号：JP33365399
申请日：1999-11-25
申请人： FUJI PHOTO FILM CO LTD , SUGITA RYUJI
发明人： NAGAO MAKOTO , SUGITA RYUJI , NISHIKAWA SHOICHI
IPC分类号： G11B5/596 , G11B5/86
摘要： PROBLEM TO BE SOLVED: To transfer a pattern of high grade from a master carrier to a slave medium by magnetic transfer. SOLUTION: The master carrier for magnetic transfer in which a magnetic layer corresponding to recording information for transfer is formed on a surface of a substrate and the slave medium which is a magnetic recording medium to which transfer is executed are brought into contact with each other and a magnetic field for transfer is impressed thereto. In the master carrier for magnetic transfer used in this transfer method, relative magnetic permeability of the magnetic layer thereof is 10 to 1000.

7. 发明专利

JP2000195048A MASTER CARRIER FOR MAGNETIC TRANSFER AND TRANSFER METHOD 失效
公开(公告)号：JP2000195048A
公开(公告)日：2000-07-14
申请号：JP33802199
申请日：1999-11-29
申请人： FUJI PHOTO FILM CO LTD , SUGITA RYUJI
发明人： NAGAO MAKOTO , KATAYAMA KAZUTOSHI
IPC分类号： G11B5/72 , G11B5/86
摘要： PROBLEM TO BE SOLVED: To stably and highly accurately transfer preformat records such as servo signals for tracking, address information signals, reproduction clock signals or the like to a disk-shaped medium such as a hard disk, a large-capacity removable disk medium, a large-capacity flexible medium or the like in a short time with a good productivity for many times. SOLUTION: This carrier is constituted to transfer record information to a magnetic recording medium. In this case, a plurality of transfer information record parts 11 of a ferromagnetic layer of a pattern corresponding to record information for transfer are provided on a substrate. A space or nonmagnetic part is present between the transfer information record parts 11. The transfer information record part 11 has a surface hardness of not smaller than 20 GPa and is provided with a diamond-like carbon protecting film 14 of a thickness of 5-30 nm to a surface thereof.

8. 发明专利

JP2000195046A MASTER CARRIER FOR MAGNETIC TRANSFER 失效
公开(公告)号：JP2000195046A
公开(公告)日：2000-07-14
申请号：JP33801999
申请日：1999-11-29
申请人： FUJI PHOTO FILM CO LTD , SUGITA RYUJI
发明人： NAGAO MAKOTO
IPC分类号： G11B5/86
摘要： PROBLEM TO BE SOLVED: To execute pre-format recording in higher accuracy by providing a non-magnetic material between adjacent transfer information recording part and forming the plane where the surfaces of the transfer information recording part and non-magnetic material part are substantially identical. SOLUTION: On a master carrier 1 for magnetic transfer, a transfer information recording part 10 consisting of ferro-magnetic material is formed depending on the pre-format. A non-magnetic part 11 is provided between the ferro-magnetic magnetizing part and the transfer information recording part 10 of the master carrier 1 for magnetic transfer and the non-magnetic part 11 substantially form the identical plane. Here, a certain part of the magnetic layer and the part where there is no magnetic layer should have the projection and recess of 30 nm or less, preferably of 10 nm or less. Moreover, the cross-section in the track direction vertical to the plane of the master carrier for magnetic transfer is formed in rectangular shape and thereby the boundary with non- magnetic part is partitioned with the plane vertical to the plane of the master carrier for magnetic transfer and thereby it is no longer observed that the angled part of the information recording area in the transfer field of the slave medium is lost or recording is missed.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式