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1. 发明公开

US20240347074A1 ROTATING BODY MOUNTING DEVICE AND HARD DISK MANUFACTURING METHOD 审中-公开
公开(公告)号：US20240347074A1
公开(公告)日：2024-10-17
申请号：US18603486
申请日：2024-03-13
申请人： KOMURA- TECH Co., Ltd.
发明人： Makoto Gonda
IPC分类号： G11B5/53 , G11B5/84
CPC分类号： G11B5/53 , G11B5/84 , G11B2220/2516
摘要： To automatically perform centering for making the center of a mounting hole of a rotating body positioned on the axial center of a rotation shaft, with the rotation shaft placed in non-contact with a peripheral edge of the mounting hole, when inserting the rotation shaft into the mounting hole.
A rotating body is held to a holding surface of a holder in a non-contact state by an action of air, and a movable shaft having the same axial center as a rotation shaft and whose leading end directly faces one end of the rotation shaft is provided as being housed in an insertion part of the holder movably in the axial direction, wherein the centering is automatically performed by making Bernoulli effect appear by the air flowing from the side of a surface opposite to a surface to be held of the rotating body toward the surface to be held through a space between an outer periphery of the movable shaft or that of the rotation shaft and a peripheral edge of the mounting hole, in a series of processes for switching from a state in which the movable shaft is inserted into the mounting hole to a state in which the rotation shaft is inserted into the mounting hole, by moving the holder in the axial direction of the rotation shaft in a state where the mounting hole is positioned on an extension line of the rotation shaft.

2. 发明公开

US20240244717A1 HEAT TREATMENT CHAMBER, FILM FORMING APPARATUS, AND SUBSTRATE HEATING METHOD 审中-公开
公开(公告)号：US20240244717A1
公开(公告)日：2024-07-18
申请号：US18407627
申请日：2024-01-09
申请人： Resonac Corporation , Ushio Denki Kabushiki Kaisha
发明人： Gohei KUROKAWA , Haruhisa OHASHI , Takahiro INOUE
IPC分类号： H05B3/00 , G11B5/84
CPC分类号： H05B3/0038 , G11B5/84
摘要： A heat treatment chamber for performing a heat treatment on a substrate, includes a chamber housing surrounding the substrate, a light transmitting window forming a part of the chamber housing, and an LED light source, provided on an outer side of the chamber housing, and configured to irradiate light on the substrate arranged inside the chamber housing through the light transmitting window, so to perform the heat treatment on the substrate.

3. 发明公开

US20240135970A1 MAGNETIC DISK SUBSTRATE, MAGNETIC DISK, ANNULAR-SHAPED SUBSTRATE, AND METHOD FOR MANUFACTURING MAGNETIC DISK SUBSTRATE 审中-公开
公开(公告)号：US20240135970A1
公开(公告)日：2024-04-25
申请号：US18547572
申请日：2022-02-24
申请人： HOYA CORPORATION
发明人： Shuhei AZUMA , Toshio TAKIZAWA
IPC分类号： G11B5/73 , G11B5/82 , G11B5/84
CPC分类号： G11B5/73921 , G11B5/82 , G11B5/84
摘要： A magnetic-disk substrate according to an embodiment includes two main surfaces and an outer circumferential edge surface. In the magnetic-disk substrate, the outer circumferential edge surface includes two chamfered surfaces that are respectively connected to the main surfaces, and a side wall surface that is curved and extends to protrude outward between the two chamfered surfaces. The side wall surface has a radius of curvature of 1100 μm or more on a cross-section of the magnetic-disk substrate extending along a plate thickness direction of the magnetic-disk substrate.

4. 发明公开

US20240101463A1 GLASS SHEET FOR FABRICATING MAGNETIC RECORDING MEDIA AND METHOD OF FABRICATING MAGNETIC RECORDING MEDIA 审中-公开
公开(公告)号：US20240101463A1
公开(公告)日：2024-03-28
申请号：US17955403
申请日：2022-09-28
申请人： Western Digital Technologies, Inc.
发明人： Shoji Suzuki , Mary Grace Shieh
IPC分类号： C03B33/04 , G11B5/73 , G11B5/84
CPC分类号： C03B33/04 , G11B5/73921 , G11B5/8404
摘要： A glass sheet configured to be cut into glass substrates for magnetic recording disks is described. The glass sheet includes a first surface. For surface features of the first surface with a feature wavelength of 60 to 500 micrometers (μm), a root mean square of a surface topography of the surface features determined using a surface analysis on the first surface with incident and reflected light is given as a microwaviness. A maximum value of the microwaviness of any arbitrary region of the first surface may be between 1.2 nanometers (nm) and 2.8 nm, inclusive of 1.2 nm and 2.8 nm. After the surface analysis, the glass sheet may be cut into the glass substrates in response to determining that the maximum value of the microwaviness is in the noted range. Further, a method of fabricating glass substrates from a glass sheet is described.

5. 发明授权

US11821067B2 Deposition apparatus 有权
公开(公告)号：US11821067B2
公开(公告)日：2023-11-21
申请号：US16860646
申请日：2020-04-28
申请人： Canon Anelva Corporation
发明人： Masahiro Atsumi
IPC分类号： C23C14/32 , C23C14/56 , H01J37/32 , H01J37/34 , H01J27/08 , C23C14/54 , G11B5/84 , C23C14/50
CPC分类号： C23C14/325 , C23C14/505 , C23C14/54 , C23C14/568 , G11B5/8408 , H01J27/08 , H01J37/32055 , H01J37/32064 , H01J37/32614 , H01J37/32944 , H01J37/34 , H01J37/3417
摘要： A deposition apparatus, which forms a film on a substrate, includes a rotation unit configured to rotate a target about a rotating axis; a striker configured to generate an arc discharge; a driving unit configured to drive the striker so as to make a close state which the striker closes to a side surface around the rotating axis of the target to generate the arc discharge; and a control unit configured to control rotation of the target by the rotation unit so as to change a facing position on the side surface of the target facing the striker in the close state.

6. 发明授权

US11682424B2 Magnetic-disk substrate, magnetic disk, and magnetic-disk drive device 有权
公开(公告)号：US11682424B2
公开(公告)日：2023-06-20
申请号：US17385787
申请日：2021-07-26
申请人： HOYA CORPORATION
发明人： Masanobu Itaya , Kinobu Osakabe
IPC分类号： G11B5/82 , G11B5/73 , G11B5/84 , B82Y10/00 , B82Y40/00
CPC分类号： G11B5/82 , G11B5/73913 , G11B5/73919 , G11B5/73921 , G11B5/84 , G11B5/8404 , B82Y10/00 , B82Y40/00
摘要： A magnetic-disk substrate has a pair of main surfaces, and an arithmetic average roughness Ra of each of the main surfaces is 0.11 nm or less. The arithmetic average roughness Ra is a value obtained through measurement using an atomic force microscope provided with a probe having a probe tip provided with a carbon nanofiber rod-shaped member. The magnetic-disk substrate is made of glass or aluminum alloy.

7. 发明公开

US20230186948A1 DUMMY SUBSTRATE AND MANUFACTURING METHOD THEREOF CROSS-REFERENCE TO RELATED APPLICATION 审中-公开
公开(公告)号：US20230186948A1
公开(公告)日：2023-06-15
申请号：US18165363
申请日：2023-02-07
申请人： SHOWA DENKO K.K.
发明人： Sunao KAKITA , Tahahiro KUSHINO , Hidenori INADA
IPC分类号： G11B5/73 , G11B5/84 , G11B5/82
CPC分类号： G11B5/73921 , G11B5/8404 , G11B5/82
摘要： A dummy substrate is formed with a disk-shaped glass substrate having a center hole, and a magnetic recording film on an outer circumferential surface along a thickness direction of the glass substrate and an inner circumferential surface of the center hole, and a surface roughness (Ra) of one surface and the other surface of the glass substrate is in a range of 0.2 nm or more and 100 nm or less.

8. 发明授权

US11581015B2 Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device 有权
公开(公告)号：US11581015B2
公开(公告)日：2023-02-14
申请号：US17386616
申请日：2021-07-28
申请人： FUJIFILM Corporation
发明人： Norihito Kasada
IPC分类号： G11B5/78 , G11B5/712 , G11B5/708 , G11B5/714 , G11B5/706 , G11B5/71 , G11B5/735 , G11B5/84
摘要： The magnetic tape includes a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer includes one or more components selected from the group consisting of fatty acid and fatty acid amide, a C—H derived C concentration calculated from a C—H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed on a surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is equal to or greater than 45 atom %, and an absolute value ΔN of a difference between a refractive index Nxy measured regarding an in-plane direction of the magnetic layer and a refractive index Nz measured regarding a thickness direction of the magnetic layer is 0.25 to 0.40.

9. 发明授权

US11551716B2 Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device 有权
公开(公告)号：US11551716B2
公开(公告)日：2023-01-10
申请号：US17368274
申请日：2021-07-06
申请人： FUJIFILM Corporation
发明人： Norihito Kasada
IPC分类号： G11B5/735 , G11B5/712 , G11B5/708 , G11B5/71 , G11B5/714 , G11B5/706 , G11B5/78 , G11B5/84
摘要： The magnetic tape includes a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which an absolute value ΔN of a difference between a refractive index Nxy measured regarding an in-plane direction of the magnetic layer and a refractive index Nz measured regarding a thickness direction of the magnetic layer is 0.25 to 0.40, and a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding a surface of the magnetic layer is equal to or smaller than 0.050.

10. 发明授权

US11495259B2 Fabrication methods for magnetic recording tape having resilient substrate 有权
公开(公告)号：US11495259B2
公开(公告)日：2022-11-08
申请号：US17129577
申请日：2020-12-21
申请人： International Business Machines Corporation
发明人： Richard Bradshaw
IPC分类号： G11B5/84 , G11B5/008 , G11B25/06 , G11B5/66
摘要： A method for making a magnetic recording tape, in accordance with one approach, includes coupling an underlayer to a substrate, the substrate comprising a poly ether ether ketone (PEEK). A method for making a magnetic recording tape in accordance with another approach includes coupling an underlayer to a substrate via radiation-induced grafting, the substrate comprising a poly ether ether ketone (PEEK). A recording layer may be coupled to the underlayer.

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