公开(公告)号：US20210012800A1

公开(公告)日：2021-01-14

申请号：US16969678

申请日：2018-11-19

申请人： Sony Corporation

发明人： Minoru YAMAGA ,  Takanobu IWAMA ,  Jun TAKAHASHI

IPC分类号： G11B5/706 ,  G11B5/71 ,  G11B5/714 ,  G11B5/592

摘要： A tape-shaped magnetic recording medium is provided with a base, an underlayer provided on the base, and a magnetic layer provided on the underlayer including magnetic powder including hexagonal ferrite. The underlayer and the magnetic layer include lubricant. The magnetic layer includes a surface provided with a large number of holes, and arithmetic average roughness Ra of the surface is 2.5 nm or smaller. A BET specific surface area of a whole of the magnetic recording medium in a state in which the lubricant is removed is 3.5 m2/mg or larger. A square ratio in a vertical direction is 65% or larger, an average thickness of the magnetic layer is 90 nm or smaller, and an average thickness of the magnetic recording medium is 5.6 μm or smaller.

公开(公告)号：US20200321033A1

公开(公告)日：2020-10-08

申请号：US16886191

申请日：2020-05-28

申请人： SONY CORPORATION

发明人： Eiji NAKASHIO ,  Kazuo ANNO ,  Shinya TOCHIKUBO ,  Takanobu IWAMA

IPC分类号： G11B27/30 ,  G11B23/03

摘要： A cartridge includes a tape-shaped magnetic recording medium and a cartridge memory. The cartridge memory includes a communication unit that communicates with a recording/reproducing device in a state where the cartridge is loaded on the recording/reproducing device; a storage unit; and a control unit that stores information received from the recording/reproducing device through the communication unit in the storage unit, reads the information from the storage unit according to a request from the recording/reproducing device, and transmits the information to the recording/reproducing device through the communication unit. The information includes manufacturing information of the cartridge and adjustment information for adjusting a tension applied to the magnetic recording medium in a longitudinal direction thereof, and the tape-shaped magnetic recording medium has a plurality of servo bands.

公开(公告)号：US20210383836A1

公开(公告)日：2021-12-09

申请号：US16957295

申请日：2019-10-21

申请人： Sony Corporation

发明人： Kazuo ANNO ,  Takanobu IWAMA ,  Shinya TOCHIKUBO ,  Eiji NAKASHIO ,  Naohiro ADACHI

IPC分类号： G11B20/18 ,  G11B5/008 ,  G11B15/68 ,  H01Q1/24

摘要： A cartridge memory is a cartridge memory used in a magnetic tape cartridge, including: an antenna unit; a storage unit that stores data; and a control unit that reads the data from the storage unit in response to a request from a recording/reproduction apparatus, adds an error correction code to the data, and transmits the obtained data via the antenna unit.

公开(公告)号：US20210366514A1

公开(公告)日：2021-11-25

申请号：US16957290

申请日：2019-10-21

申请人： Sony Corporation

发明人： Shinya TOCHIKUBO ,  Takanobu IWAMA ,  Eiji NAKASHIO ,  Kazuo ANNO ,  Naohiro ADACHI

IPC分类号： G11B5/78

摘要： A cartridge memory is a cartridge memory used in a recording medium cartridge and includes an antenna section that induces an induced voltage by means of electromagnetic induction, a load modulation section including a load whose magnitude is variable, and a control section that measures the induced voltage and controls the load modulation section on the basis of the measured induced voltage.

公开(公告)号：US20210241793A1

公开(公告)日：2021-08-05

申请号：US17053573

申请日：2019-03-08

申请人： Sony Corporation

发明人： Kazuo ANNO ,  Eiji NAKASHIO ,  Takanobu IWAMA ,  Naohiro ADACHI ,  Shinya TOCHIKUBO ,  Masayoshi ABE

IPC分类号： G11B5/78 ,  G11B5/008

摘要： A recording medium cartridge according to an embodiment of the present technology includes: an information recording medium; a first cartridge memory; and a second cartridge memory. The first cartridge memory is capable of storing first information relating to the information recording medium, and includes a non-contact communication medium capable of reading/writing the first information via a first communication device disposed in a drive device. The second cartridge memory is capable of storing second information relating to the information recording medium, and is configured to be capable of reading the second information via a second communication device.

公开(公告)号：US20210125634A1

公开(公告)日：2021-04-29

申请号：US16605469

申请日：2018-11-19

申请人： Sony Corporation

发明人： Minoru YAMAGA ,  Takanobu IWAMA ,  Jun TAKAHASHI

IPC分类号： G11B5/73 ,  G11B5/78

摘要： This technology aims to provide a magnetic recording tape and the like, which allow the tape to stably run at high speed while maintaining a state in which the distance between a magnetic head and the tape is held narrow.
This technology provides a magnetic recording tape having a plural-layer structure including at least a magnetic layer. The tape has a total thickness of 5.6 μm or smaller, and includes a plurality of indentations disposed in a surface of the magnetic layer. A value obtained by dividing a depth D1 of each indentation with a thickness D2 of the magnetic layer is 15% or greater. The magnetic layer is perpendicularly oriented, and has a perpendicular orientation of 65% or greater under condition of no demagnetization correction. The magnetic layer includes a plurality of indentations formed therein, a plurality of the indentations each has a depth of 20% or greater of the thickness of the magnetic layer, and the number of the indentations is 55 or more per 6,400 μm2 of a surface area of the magnetic layer. This technology also provides a manufacturing method of the magnetic recording tape.

公开(公告)号：US20210012805A1

公开(公告)日：2021-01-14

申请号：US16969876

申请日：2019-02-18

申请人： Sony Corporation

发明人： Masaru TERAKAWA ,  Minoru YAMAGA ,  Takanobu IWAMA ,  Jun TAKAHASHI

IPC分类号： G11B20/12 ,  G11B5/733 ,  G11B5/706 ,  G11B5/008

摘要： [Object] Provided is a technology that is capable of further improving a recording density of data.
[Solving Means] A magnetic recording medium according to the present technology is a magnetic recording medium in a shape of a tape that is long in a longitudinal direction and is short in a width direction, the medium including: a base material; a magnetic layer; and a non-magnetic layer that is provided between the base material and the magnetic layer, and contains one or more types of non-magnetic inorganic particles, in which the magnetic layer includes a data band long in the longitudinal direction in which a data signal is to be written, and a servo band long in the longitudinal direction in which a servo signal is written, and in the magnetic layer, a degree of vertical orientation is greater than or equal to 65%, a half width of a solitary waveform in a reproduction waveform of the servo signal is less than or equal to 195 nm, and a thickness of the magnetic layer is less than or equal to 90 nm, and the non-magnetic layer contains at least Fe-based non-magnetic particles as the non-magnetic inorganic particles, and in the non-magnetic layer, an average particle volume of the Fe-based non-magnetic particles is less than or equal to 2.0×10−5 μm3, and a thickness of the non-magnetic layer is less than or equal to 1.1 μm.

公开(公告)号：US20220254370A1

公开(公告)日：2022-08-11

申请号：US17052084

申请日：2020-01-06

申请人： Sony Corporation

发明人： Minoru YAMAGA ,  Eiji NAKASHIO ,  Kazuo ANNO ,  Takanobu IWAMA ,  Naohiro ADACHI ,  Shinya TOCHIKUBO

IPC分类号： G11B5/008

摘要： [Solving Means] A cartridge according to the present technology includes: a cartridge case; and a memory.
The cartridge case houses a magnetic tape. The memory is provided in the cartridge case, the memory storing information before data recording by the magnetic tape, the information being for adjusting, during data recording or during data reproduction by the magnetic tape, a width of the magnetic tape.

公开(公告)号：US20220199115A1

公开(公告)日：2022-06-23

申请号：US16651454

申请日：2019-10-01

申请人： Sony Corporation

发明人： Kazuya HASHIMOTO ,  Minoru YAMAGA ,  Takanobu IWAMA ,  Jun TAKAHASHI

IPC分类号： G11B5/73 ,  G11B5/78 ,  G11B5/17

摘要： A magnetic recording medium that can exhibit good traveling performance during use is provided. This magnetic recording medium is a tape-shaped magnetic recording medium, and includes a substrate, a base layer disposed on the substrate, and a magnetic layer disposed on the base layer. The substrate includes a polyester as a main component. The average thickness of the base layer is 0.9 μm or less. The base layer and the magnetic layer each include a lubricant. The magnetic layer has a surface having a large number of holes, and the arithmetic average roughness Ra of the surface is 2.5 nm or less. The BET specific surface area of the entire magnetic recording medium is 3.5 m2/g or more in a state where the lubricant has been removed from the magnetic recording medium and the magnetic recording medium has been dried. The squareness ratio in the perpendicular direction is 65% or more. The average thickness of the magnetic layer is 90 nm or less. The average thickness of the magnetic recording medium is 5.6 μm or less.

公开(公告)号：US20220165303A1

公开(公告)日：2022-05-26

申请号：US16651546

申请日：2019-10-01

申请人： Sony Corporation

发明人： Minoru YAMAGA ,  Takanobu IWAMA ,  Jun TAKAHASHI

IPC分类号： G11B5/71 ,  G11B5/008 ,  C10M105/24 ,  C10M105/34

摘要： A magnetic recording medium that can exhibit good traveling performance during use is provided. This magnetic recording medium is a tape-shaped magnetic recording medium, and includes a substrate including a polyester as a main component, a base layer disposed on the substrate, and a magnetic layer disposed on the base layer. The kurtosis of the surface of the magnetic layer is 3.0 or more. The base layer and the magnetic layer each include a lubricant including a fatty acid and a fatty acid ester. In the lubricant, a ratio of the content of the fatty acid to the content of the fatty acid ester is less than 0.6.