公开(公告)号：US20170249966A1

公开(公告)日：2017-08-31

申请号：US15521775

申请日：2015-11-16

Applicant: Sony Corporation

Inventor： Junichi TACHIBANA ,  Tetsuo ENDO ,  Tomoe OZAKI ,  Hikaru TERUI

IPC: G11B5/78 ,  G11B5/73 ,  G11B5/667 ,  G11B5/725

Abstract: A magnetic recording medium includes a long-shaped base substrate having flexibility, a soft magnetic layer, and a magnetic recording layer. A squareness ratio in a longitudinal direction of the base substrate is equal to or less than a squareness ratio in a short-side direction of the base substrate. The squareness ratio in the longitudinal direction of the base substrate is 30% or less.

公开(公告)号：US20190080712A1

公开(公告)日：2019-03-14

申请号：US15765600

申请日：2016-11-16

Applicant: SONY CORPORATION

Inventor： Junichi TACHIBANA ,  Tetsuo ENDO ,  Tomoe OZAKI ,  Takashi AIZAWA

IPC: G11B5/667 ,  G11B5/725 ,  G11B5/73 ,  G11B5/65 ,  C23C14/00

Abstract: A magnetic recording medium includes: an elongated substrate having flexibility; a first layer, being provided on the substrate, containing Cr, Ni, and Fe, and having a face-centered cubic lattice structure with a (111) plane preferentially oriented so as to be parallel to a surface of the substrate; a second layer, being provided on the first layer, containing Co and O, having a ratio of an average atomic concentration of O to an average atomic concentration of Co of 1 or more, and having a column structure with an average particle diameter of 3 nm or more and 13 nm or less; a third layer, being provided on the second layer, and containing Ru; and a perpendicular recording layer, being provided on the third layer.

公开(公告)号：US20150279402A1

公开(公告)日：2015-10-01

申请号：US14666581

申请日：2015-03-24

Applicant: Sony Corporation

Inventor： Noboru SEKIGUCHI ,  Junichi TACHIBANA ,  Tetsuo ENDO ,  Tomoe OZAKI ,  Hikaru TERUI

IPC: G11B5/667 ,  G11B5/738 ,  G11B5/851 ,  G11B5/73

CPC classification number: G11B5/667 ,  G11B5/64 ,  G11B5/7325 ,  G11B5/738 ,  G11B5/851

Abstract: A magnetic recording medium includes a base material which has flexibility, a lower coating layer, and a recording layer, in which, in X-ray diffraction peaks, a value of Δθ50 where a diffraction peak of magnetic atoms which are included in the recording layer is measured by a locking curve method is 5° or more to less than 10°.

Abstract translation: 磁记录介质包括具有柔性的基材，下涂层和记录层，其中在X射线衍射峰中具有包含的磁性原子的衍射峰值 在记录层中通过锁定曲线法测量的是5°以上至小于10°。

公开(公告)号：US20210043224A1

公开(公告)日：2021-02-11

申请号：US16762341

申请日：2018-11-09

Applicant: Sony Corporation

Inventor： Tetsuo ENDO

IPC: G11B5/008 ,  G11B15/60 ,  G11B5/584 ,  G11B5/02 ,  B24B9/00

Abstract: A servo writer includes a writing head that writes a servo signal on a long magnetic tape that is traveling, a guide roller that is provided on an upstream side of a travel path with respect to the writing head and guides the traveling magnetic tape, and a polishing unit that is provided on an upstream side of the travel path with respect to the guide roller and polishes at least one edge of the traveling magnetic tape, in which the guide roller includes a flange that regulates the travel of the magnetic tape.

公开(公告)号：US20190035424A1

公开(公告)日：2019-01-31

申请号：US16069427

申请日：2016-12-14

Applicant: Sony Corporation

Inventor： Tetsuo ENDO

IPC: G11B5/706 ,  G11B5/008

Abstract: A magnetic recording medium includes: a substrate; a recording layer; and a layer being provided between the substrate and the recording layer, the layer containing a superelastic body.