93results about "Tape carriers" patented technology

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. 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.

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

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.

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 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. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. An arithmetic average curvature Spc of a peak point specified in ISO 25178 on a surface of the magnetic layer is 0.30 (1 / μm) or more and 0.70 (1 / μm) or less, and standard deviation a of the Spc in a width direction of the surface of the magnetic layer is 0.15 (1 / μm) or less.

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 C-H-derived C density is 45 atom% or more and 65 atom% or less and is calculated from a C-H peak area ratio in a C1s spectrum obtained through X-ray photoelectron spectroscopic analysis performed at a photoelectron take-out angle of 10 degrees on a surface of a magnetic layer, in an environment of a temperature of 32°C and relative humidity of 80%, frictional force F45° on the surface of the 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

A main object of the present technology is to improve reliability and resolution of a magnetic recording tape by controlling distribution of the binder in the underlayer and a magnetic surface.The present technology provides a magnetic recording medium including: a magnetic layer; an underlayer; and a base layer in this order, in which the underlayer contains a chlorine-containing binder, and in the underlayer, a part having a chlorine count equal to or more than a threshold described below has a thickness of 130 nm or less, and a core portion level difference Rk is 5.5 nm or less and an average thickness of the underlayer is 1100 nm or less in a bearing curve created on the basis of height data of a magnetic layer side surface acquired using an atomic force microscope.[Threshold]=[an⁢ average⁢ chlorine⁢ count⁢ in⁢ the⁢ underlayer]+⁠6×
[a⁢ standard⁢ deviation⁢ determined⁢ in⁢ calculation⁢ of⁢ the⁢ average⁢ chlorine⁢ count]

The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which a friction coefficient measured on a base portion of a surface of the magnetic layer is 0.35 or less, and standard deviation σ of the friction coefficient in a width direction of the surface of the magnetic layer is 0.05 nm or less.

The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which a non-linear component of tape width deformation generated by storage for 10 days in an environment of a temperature of 60° C. and a relative humidity of 20% is 100 nm or less. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape.

This invention relates to a contactless storage medium, a magnetic tape cassette, a method for operating the contactless storage medium, and the storage medium itself. The contactless storage medium mounted on the magnetic tape cassette includes an IC chip connected to an antenna that is electromagnetically coupled to the communication destination via a magnetic field supplied from the destination, and communicates with the communication destination via the magnetic field. The IC chip corresponds to multiple communication standards and selectively uses multiple communication standards for communication.

Provided is a magnetic recording medium capable of exhibiting excellent operational reliability while dealing with a further increase in capacity. This magnetic recording medium has a longitudinally extending magnetic recording tape and a leader tape connected to the magnetic recording tape in the longitudinal direction. Furthermore, among multiple step parts formed on the leader tape after being run in accordance with conditions 1 to 3 given below, the step part located at the closest position to the part where the leader tape and the magnetic recording tape are connected together has a maximum step difference of 34 µm or less in a thickness direction of the leader tape. Here, condition 1 refers to an environment with a temperature of 23 ˚C and a relative humidity of 45% RH, condition 2 refers to use of a drive in compliance with the LTO-9 standard, and condition 3 refers to repetition of recording and playback operations of 18 terabytes of data for 140 times.

To provide a magnetic tape that suppresses a large reduction in electromagnetic conversion characteristics in recording and / or playing back data at different head inclination angles.SOLUTION: There is provided a magnetic tape in which a tape thickness of the magnetic tape is 5.2 μm or less, in an environment of a temperature of 23°C and relative humidity of 50%, the AlFeSil wear value 45° on the surface of the magnetic layer measured at an inclination angle of an AlFeSil rectangular column of 45° is 20 μm or more and 50 μm or less, a standard deviation of the AlFeSil wear values on the surface of the magnetic layer measured at inclination angles of the AlFeSil rectangular column of 0°, 15°, 30°, and 45° is 30 μm or less, and the inclination angle of the AlFeSil rectangular column is the angle formed by a longitudinal direction of the AlFeSil rectangular column and a width direction of the magnetic tape. Also there are provided a magnetic tape cartridge including the magnetic tape, and a magnetic tape device including the magnetic tape.SELECTED DRAWING: None

Provided is a magnetic recording medium that is capable of increasing the reproduction output.A magnetic recording medium is a tape-shaped magnetic recording medium and includes a recording layer. A nucleation magnetic field Hn of the magnetic recording medium satisfies a relationship of Hn≥0 [Oe], and the magnetic recording medium satisfies a relationship of the following formula (1).(Mrt)0.5×f⁡(Hs)≥0.7(1)(wherein, in the formula (1), Mrt represents a product of a residual magnetization amount Mr of the magnetic recording medium and a thickness t of the recording layer. Hs represents a saturation magnetic field of the magnetic recording medium. In a case where Hs≤8500 [Oe], f(Hs)=1.00, and in a case where Hs>8500 [Oe], f(Hs)=1 / (1+(Hs−8500) / 8500).).

The magnetic recording medium contains one or more polymers selected from the group consisting of a polymer P and a polymer Q in a portion on the non-magnetic support on the magnetic layer side. R1 represents a monovalent aromatic group or a monovalent hydrocarbon group having 6 or more carbon atoms and L1 represents a single bond or a divalent group. R2 represents a monovalent polar group and L2 represents a single bond or a divalent group. R3 represents a monovalent aromatic group or a monovalent hydrocarbon group having 6 or more carbon atoms, L3 represents a single bond or a divalent group, and R11 represents an alkyl group. R4 represents a monovalent polar group, L4 represents a single bond or a divalent group and R12 represents an alkyl group.

Provided is a magnetic recording medium which undergoes only a small amount of dimensional change caused by changes in temperature / humidity conditions. The magnetic recording medium is a tape-type magnetic recording medium having an average thickness of 5.3μｍ or less, and the magnetic recording medium includes a substrate and a magnetic layer disposed on the substrate. In an environmental relative humidity in the range of 10-80%RH, the coefficient of temperature expansion of the magnetic recording medium is 6.0-8.0 ppm / ℃.

Provided is a magnetic tape cartridge including: a case in which a magnetic tape on which a plurality of servo bands are formed is accommodated; and a storage medium provided in the case, in which the plurality of servo bands are formed at positions spaced apart from each other in a width direction of the magnetic tape along an entire length direction of the magnetic tape, and the storage medium stores pitch information capable of specifying a pitch in the width direction between the plurality of servo bands and distance information capable of specifying a distance between a plurality of servo reading elements that have read the plurality of servo bands.

Provided are: a magnetic tape cartridge in which a magnetic tape is accommodated; and a magnetic recording / playback device including the magnetic tape cartridge. The magnetic tape includes a polyethylene naphthalate support having a Young's modulus in the width direction of 10,000 MPa or more. A medium life of the magnetic tape calculated using a linear function of logarithm logeT of A and T is 3 years or more, which is derived from a value of A and a value of logarithm logeT of T which are respectively obtained when A is the maximum value of the absolute value of the difference between the servo band interval obtained before storage under an environment of 32 °C and a relative humidity of 80% and the servo band interval obtained after storage for the storage time T under said environment, and T is 24 hours, 48 hours, 72 hours, 96 hours, or 120 hours.

To provide a detection device, an inspection device, a magnetic tape cartridge, a magnetic tape, a magnetic tape drive, a magnetic tape system, a detection method, an inspection method, and a program capable of accurately detecting servo pattern signals.SOLUTION: A detection device includes a processor. The processor detects a servo pattern signal indicating a servo pattern by comparing a servo band signal which is a result of reading a servo band by a servo reading element from a magnetic tape having the servo band on which the servo pattern is recorded, with a threshold value. The threshold value is determined according to an angle formed by the servo pattern and the servo reading element.SELECTED DRAWING: Figure 12

Provided is a magnetic recording medium with which excellent electromagnetic conversion characteristics can be ensured while suppressing increase of a standard deviation σPES due to multiple-time running.　The magnetic recording medium is sequentially provided with a base body, a ground layer, and a magnetic layer. The magnetic layer includes magnetic particles, conductive first particles, and second particles having a Mohs hardness of not less than 7.0. The magnetic layer has an uneven shape on a magnetic surface thereof. The uneven shape includes first protrusions formed by the first particles and second protrusions formed by the second particles. The ratio H1 / H2 of the average height H1 of the first protrusions to the average height H2 of the second protrusions satisfies H1 / H2≤2.3. A height range ΔH obtained from statistical information of the height of the uneven shape satisfies 3.00 nm≤ΔH≤6.00 nm. A gradient range ΔA obtained from statistical information of a gradient of the uneven shape satisfies 4.00 degrees≤ΔA≤9.00 degrees.

The purpose of the present invention is to provide a magnetic recording medium that has excellent running stability even when stored in a high-temperature environment.　The present invention provides a magnetic recording medium in which, when dynamic viscoelasticity measurement is performed on the magnetic recording medium at a frequency of 10 Hz and a heating rate of 2°C / min, the average value A(E") of the loss elastic modulus E" in the temperature range of 60°C to 65°C is 0.06 GPa or less, and the average height Rpk of the protruding peaks measured using a non-contact profilometer using optical interference is 2.4 nm or less.

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 is provided, the magnetic tape exhibiting a nonlinear component of a signal phase difference of 17.5 nm or less after 10-day storage in an environment with temperature of 60°C and relative humidity of 20%. Also provided are a magnetic tape cartridge comprising the magnetic tape, and a magnetic tape device.SELECTED DRAWING: None

To provide a servo writer that reduces the number of cartridges to be discarded.SOLUTION: A servo writer 210 for a cartridge 10 includes: a traveling portion that feeds out a tape-shaped magnetic recording medium (magnetic tape MT) from the cartridge and winds the feed magnetic recording medium to make the magnetic recording medium travel; a demagnetizing magnet 214 that erases a first servo pattern formed on the traveling magnetic recording medium; a servo signal writing head 215 that writes a servo signal onto the traveling magnetic recording medium after the first servo pattern is erased and forms a second servo pattern; and a control device that controls the head to write the servo signal during at least one of acceleration and deceleration traveling periods of the magnetic recording medium and forms the second servo pattern that does not satisfy the standard on the magnetic recording medium.SELECTED DRAWING: Figure 8

A magnetic tape having a time base servo pattern is provided for use in a magnetic tape device with a total data track count of 8705 or more when converted to a 1 / 2-inch wide magnetic tape, wherein the ΔPNL of the time base servo pattern is 10.0% or less of the track pitch. A magnetic tape device is also provided, comprising a tape cassette and a magnetic tape, the tape cassette including the aforementioned magnetic tape, the magnetic tape device having a total data track count of 8705 or more when converted to a 1 / 2-inch wide magnetic tape, the magnetic tape having a time base servo pattern, wherein the ΔPNL of the time base servo pattern is 10.0% or less of the track pitch. The ΔPNL represents the amount by which the time base servo pattern deviates from linearity.