214results about "Tape carriers" patented technology

Systems, methods, and instrumentalities are disclosed for retrieving information from tapes. The first group of read elements may be positioned adjacent to the first track and the second group of read element may be adjacent to the second track. In some embodiments, the system may include a second read sensor. Multiple readings of the electromagnetic fields generated by the first track may be collected using multiple read elements of the first group, A composite interpretation of a set of data encoded on the first track may be generated based on the multiple readings of the electromagnetic fields generated by the first track that are collected by the multiple read elements of the first group.

A main object of the present technology is to improve the reliability of a magnetic recording tape by controlling the distribution of the binder in the underlayer.The present technology provides a magnetic recording medium including a magnetic layer, an underlayer, and a base layer in this order, the underlayer containing a chlorine-containing binder, the underlayer including a part having a thickness of 130 nm or less, the part having a chlorine count equal to or more than a threshold described below:[T⁢hreshold]=[⁠an⁢ average⁢ chlorine⁢ count⁢ in⁢ the⁢ underlayer]+6×[a⁢ standard⁢ deviation⁢ determined⁢ in⁢ calculation⁢ of⁢ the⁢ average⁢ chlorine⁢ count].Furthermore, the present technology also provides a magnetic recording medium including a magnetic layer, an underlayer, and a base layer in this order, the underlayer containing a chlorine-containing binder, the underlayer including a part having a thickness of 12% or less of a thickness of the underlayer, the part having a chlorine count equal to or more than the above-described threshold.

A plurality of servo patterns are recorded in a magnetic tape along a longitudinal direction. The servo pattern is at least one linear magnetization region pair. The linear magnetization region pair includes a first linear magnetization region, which is linearly magnetized, and a second linear magnetization region, which is linearly magnetized. The first linear magnetization region and the second linear magnetization region are inclined in opposite directions with respect to a first imaginary straight line along a width direction of the magnetic tape. The first linear magnetization region has a steeper inclined angle with respect to the first imaginary straight line than the second linear magnetization region.

The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder, in which an absolute value ΔN of a difference between a refractive index Nxy measured in an in-plane direction of the magnetic layer and a refractive index Nz measured in a thickness direction of the magnetic layer is 0.25 or more and 0.40 or less, and standard deviation a of the ΔN in a width direction of the magnetic layer is 0.05 or less.

A first servo pattern has a first position and a second position which intersect an imaginary line. A second servo pattern has a third position intersecting the imaginary line. The imaginary line is set at a position at which a relationship in which a distance between the first position and the second position is half of a distance between the first position and the third position is established between the first servo pattern and the second servo pattern adjacent to each other in a longitudinal direction. A width of a servo band is set to a length in which a distance from the imaginary line to one end of the servo band in a width direction and a distance from the imaginary line to the other end of the servo band in the width direction are equal.

Provided is a magnetic recording medium that is capable of achieving favorable electromagnetic conversion characteristics and suppressing the increase in friction.A magnetic recording medium is a tape-shaped magnetic recording medium and includes: a base; and a magnetic layer. An average thickness of the magnetic recording medium is 5.30 μm or less. The magnetic layer contains a chlorine atom and a nitrogen atom, an atomic concentration ratio (A2 / A1) of a maximum chlorine atomic concentration A1 obtained by measuring a chlorine atomic concentration of the magnetic layer in a thickness direction of the magnetic layer and a maximum nitrogen atomic concentration A2 obtained by measuring a nitrogen atomic concentration of the magnetic layer in the thickness direction of the magnetic layer is 0.50 or more and 0.75 or less. An average value of a protruding peak height Rpk of a surface of the magnetic layer is 2.10 nm or less.

A servo pattern recording head includes: a plurality of head cores that are magnetically separated from each other; and a plurality of gap patterns that are formed on a front surface of each of the plurality of head cores and that are used for recording a plurality of servo patterns in a width direction of a magnetic tape by applying a magnetic field to the magnetic tape in response to a pulse current, in which the plurality of gap patterns are formed on the front surface along a direction corresponding to the width direction, and the plurality of gap patterns deviate from each other at a predetermined interval in a direction corresponding to a longitudinal direction of the magnetic tape between the gap patterns adjacent to each other along the direction corresponding to the width direction.

Systems and methods are disclosed for retrieving information from legacy storage media with high fidelity and minimal contact. A read sensor with multiple read elements detects electromagnetic fields from tracks on a storage medium. Readings from different elements are combined to generate a composite interpretation, which can be used to, for example, generate digitized waveforms and determine if portions of tracks are damaged.

The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which the number of recesses existing on a surface of the magnetic layer and having an equivalent circle diameter of 0.25 μm or more and 0.55 μm or less is 10 or more and 500 or less per an area of 40 μm×40 μm, and standard deviation a of the number of the recesses in a width direction of the surface of the magnetic layer is 50 or less.

Provided is a magnetic tape having a non-magnetic support and a magnetic layer containing a ferromagnetic powder, wherein the protrusion height Spk defined in ISO 25178 is 1.2 to 2.8 nm inclusive, said protrusion height Spk being measured in a measurement region of 5 × 5 μm on the surface of the magnetic layer after 500 cycles of back and forth sliding with respect to an LTO8 head at a head inclination angle of 15° at a temperature of 15°C and a relative humidity of 80%.

Provided is a magnetic tape apparatus. In a case where a maximum value of an absolute value of a difference between a servo band interval obtained before the following storage and a servo band interval obtained after the storage of N cycles, in which a predetermined storage is set as one cycle, is denoted by A, and a medium life is equal to or longer than 5 years, which is calculated by a linear function of A and a logarithm loge T of T derived from a value of A and a value of the logarithm loge T of a total storage time T of the storage of the N cycles, each of which is obtained by setting N as 1, 2, 3, 4, or 5. The medium life is T, in a case where A satisfies Expression a: A=1.5−B+C.

The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which a contact angle with 1-bromonaphthalene, which is measured on a surface of the magnetic layer, is 45.0° or more and 55.0° or less, and standard deviation σ of the contact angle in a width direction of the surface of the magnetic layer is 1.0° or less.

The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. A rate of change in an area ratio of a protrusion having a height of 5 nm or more and 10 nm or less, which is obtained by measuring a measurement region of 5 μm×5 μm on a surface of the magnetic layer before and after 1000 reciprocating slides with respect to an LTO 8 head at a head tilt angle of 15° in an environment of a temperature of 35° C. and a relative humidity of 80%, with an atomic force microscope, is 10.0% or less.

The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. One or more components selected from the group consisting of a fatty acid and a fatty acid amide are included in a portion on the non-magnetic support on a magnetic layer side, a C—H derived C concentration calculated from a C—H peak surface area ratio of C1s spectra obtained by X-ray photoelectron spectroscopy performed on a surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 50 at % or more, and standard deviation σ of the C—H derived C concentration in a width direction of the surface of the magnetic layer is 2.0 at % or less.

To provide a magnetic recording medium with a little deterioration in electromagnetic conversion characteristics after repeated running in a high-temperature environment.SOLUTION: In a magnetic recording medium, a protrusion height difference Δ(HD-HB) is 0.7 nm or more, in which an arithmetic mean roughness Ra measured on the surface of a magnetic layer is 2.5 nm or less, a protrusion height HD, with the height of the surrounding substrate area being 0 nm, is measured by an atomic force microscope with respect to an area identified as a dark area in a first binarized image of a backscattered electron image obtained by imaging the surface of the magnetic layer with a scanning electron microscope, and a protrusion height HB, with the height of the surrounding substrate area being 0 nm, is measured by the atomic force microscope with respect to an area identified as a bright area in a second binarized image performed on the higher gradation side than the first binarized image obtained by imaging the surface of the magnetic layer with the scanning electron microscope. A magnetic tape cartridge and a magnetic recording / reproducing device include the magnetic recording medium.SELECTED DRAWING: None

Provided is a magnetic recording medium comprising a non-magnetic support and a magnetic layer containing ferromagnetic powder, and further comprising a non-magnetic layer containing non-magnetic powder between the non-magnetic support and the magnetic layer. The average pore diameter of the magnetic layer and the non-magnetic layer is 30.0 nm or less, and the standard deviation of the pore diameter distribution of the magnetic layer and the non-magnetic layer is 30.0 nm or less.

A magnetic tape according to an embodiment of the present technology is a magnetic tape including a base material and a magnetic layer provided on one of main surfaces of the base material, in which the base material is formed of polyethylene naphthalate (PEN), a total thickness of the magnetic tape is 4.9 μm or more and 5.4 μm or less, and a loop stiffness of the magnetic tape in a width direction thereof is 1.1 mg / μm or more and 1.4 mg / μm or less.

To enable data to be satisfactorily recorded and / or reproduced when the data is recorded and / or reproduced while changing a head tilt angle during running of a magnetic tape after storing the magnetic tape.SOLUTION: A magnetic tape device is provided. An angle θ formed by the axis of the element array of a magnetic head with respect to the width direction of the magnetic tape is changed during running of the magnetic tape in the magnetic tape device. When a maximum value of an absolute value of a difference between a servo band spacing obtained before storage in a predetermined environment and a servo band spacing obtained after storage in the environment for a storage time T is defined as A and T is set to be a plurality of predetermined times, a medium life calculated by a linear function of A and a logarithm loge T of T, that are derived from a value of A and a value of the logarithm loge T of T obtained for each T is 5 years or longer. The medium life is T when A satisfies a prescribed formula.SELECTED DRAWING: None

The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. A core void volume Vvc specified in international organization for standardization (ISO) 25178 on a surface of the magnetic layer is 1.200 nm3 or more and 3.000 nm3 or less, and standard deviation σ of the Vvc in a width direction of the surface of the magnetic layer is 0.120 nm3 or less.

[Problem] To provide a method for manufacturing: a tape cartridge provided with a reel hub; a tape reel; and a reel hub. The method can ensure desired molding quality in single molding. [Solution] This tape cartridge according to one embodiment is equipped with a first flange, a second flange, and a reel hub around which tape is wound. The reel hub is disposed between the first flange and the second flange. The reel hub includes a cylindrical metal ring and a molded body made of a synthetic resin. The molded body includes a first resin section formed on the inner circumferential surface of the metal ring, and a second resin section formed on the outer circumferential surface of the metal ring. The first resin section includes a plurality of first recesses that are formed at intervals in the circumferential direction of the metal ring.

An indicator indicating a non-linearity of a servo pattern is within 15% or less of a track pitch. The track pitch is a pitch between tracks. The indicator indicates a degree of variation in the plurality of distance differences from an average value of the plurality of distance differences. The distance difference is a difference between a distance between a pair of first positions corresponding to each other in the width direction in the pair of servo patterns and a distance between a pair of second positions deviated from the pair of first positions in the width direction by a first predetermined interval in the pair of servo patterns. The plurality of distance differences are obtained by measuring the distance difference for each second predetermined interval along the width direction in the pair of servo patterns. The first predetermined interval is larger than the second predetermined interval.

A magnetic recording medium is provided and including a magnetic layer containing magnetic powders, in which, the magnetic layer contains first particles having conductivity and second particles of which Mohs hardness is 7 or more, protrusions are formed on a surface of the magnetic layer side in accordance with the first particles and the second particles, a ratio (H1 / H2) of an average height (H1) of protrusions formed in accordance with the first particles to an average height (H2) of protrusions formed in accordance with the second particles is 2.3 or less, and the average height (H2) of the protrusions formed in accordance with the second particles is 7 nm or less.

The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder, in which a half-width of a frictional force, which is measured on a surface of the magnetic layer with a lateral force microscope, is 200 mV or less, and standard deviation σ of the half-width of the frictional force in a width direction of the surface of the magnetic layer is 50.0 mV or less.

The present invention provides a magnetic tape having a non-magnetic support and a magnetic layer containing a strong magnetic powder, in a small-angle X-ray scattering spectrum of the non-magnetic support obtained by small-angle X-ray scattering measurement, in a region where q is 0.5 to 1.5 A-1, a ratio of a scattering intensity I at a q value q max at which a maximum of a rate of change of the scattering intensity is present to a scattering intensity I max at which a minimum of the rate of change of the scattering intensity is present is 2.7 or more, q min < 1.5 A-1 min < 0.5 A-1 max < 0.5 A-1 min < 0.5 A-1 min < 0.5 A-1 max and a glass transition temperature Tg of the non-magnetic support is 140°C or more, a magnetic tape cartridge including the magnetic tape, and a magnetic recording and reproducing apparatus.

The servo pattern recording method according to one aspect of the present technology involves recording a servo pattern in a plurality of servo bands that are arranged at intervals in the width direction of a magnetic layer in a magnetic tape, the method including: causing the magnetic tape to travel with a prescribed tension; and recording a servo pattern in the plurality of servo bands at a second pitch narrower than a first pitch, which is the positioning interval of two servo lead heads in a tape drive device that records data in the magnetic layer or that plays back data recorded in the magnetic layer.

To provide a magnet tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder, a magnetic tape cartridge comprising the magnetic tape, and a magnetic tape device are provided. The number of recesses with circle-equivalent diameters of 0.15 to 0.25 μm, inclusive, present on a surface of the magnetic layer is 100 to 2500, inclusive, per 40 μm×40 μm area. A standard deviation σ of the number of recesses in a width direction of the surface of the magnetic layer is 100 or less.SELECTED DRAWING: None

To provide a magnetic tape that can exhibit excellent electromagnetic conversion characteristics, and is excellent in running stability in recording and / or playing back data at different head inclination angles in a high temperature and high humidity environment.SOLUTION: There is provided a magnetic tape in which a vertical direction switching field distribution SFD of the magnetic tape is 1.5 or less, in an environment of a temperature of 32°C and relative humidity of 80%, frictional force F45° on a surface of a magnetic layer with respect to an LTO8 head measured at a head inclination angle of 45° is 4 gf or more and 15 gf or less, and a standard deviation of the frictional force F on the surface of the magnetic layer with respect to the LTO8 head measured at head inclination angles of 0°, 15°, 30°, and 45° is 10 gf or less. Also there are provided a magnetic tape cartridge including the magnetic tape, and a magnetic tape device including the magnetic tape.SELECTED DRAWING: None

To provide a magnetic tape that is excellent in running stability in recording and / or playing back data at different head inclination angles in a high temperature and high humidity environment.SOLUTION: There is provided a magnetic tape in which an edge weave amount of a tape edge on at least one side of the magnetic tape is 1.5 μm or less, in an environment of a temperature of 32°C and relative humidity of 80%, frictional force F45° on a surface of a magnetic layer with respect to an LTO8 head measured at a head inclination angle of 45° is 4 gf or more and 15 gf or less, and a standard deviation of the frictional force F on the surface of the magnetic layer with respect to the LTO8 head measured at head inclination angles of 0°, 15°, 30°, and 45° is 10 gf or less. Also there are provided a magnetic tape cartridge including the magnetic tape, and a magnetic tape device including the magnetic tape.SELECTED DRAWING: None

The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which an AlFeSil abrasion value measured on a surface of the magnetic layer is 20 μm or more and 50 μm or less, and standard deviation a of the AlFeSil abrasion value obtained in a width direction of the surface of the magnetic layer is 5.0 μm or less.

Provided is a magnetic recording medium capable of suppressing narrowing of an effective recording width.　The magnetic recording medium is a tape-like magnetic recording medium, and comprises a substrate and a laminated film in the stated order. The laminated film includes, on the substrate in the following order, a soft magnetic layer containing a soft magnetic powder and a binder, and a hard magnetic layer containing a hard magnetic powder and a binder. The average thickness of the soft magnetic layer is 250 nm or greater, and the squareness proportion of the laminated film in the longitudinal direction of the magnetic recording medium is 35% or less.