16results about "Manufacturing heads with multiple gaps" patented technology

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.

To provide a magnetic recording device that can improve productivity and a manufacturing method thereof.SOLUTION: According to the embodiment, a magnetic recording device includes a magnetic recording medium, a magnetic head, and a control unit. The magnetic head includes a coil, a first magnetic pole, and a light-emission unit. The control unit performs a first operation and a second operation. In the first operation, the control unit records first servo position information to a first area of the magnetic recording medium. In the second operation, the control unit executes a repair operation when a first condition is not fulfilled. The first condition includes that the recording condition of the first servo position information is within a first range. In the repair operation, the control unit performs an erase operation for irradiating light from the light-emission unit to the first area, and performs a re-record operation for recording the first servo position information to the first area after the erase operation again.SELECTED DRAWING: Figure 1

Provided are a magnetic recording device capable of improving productivity and a method for manufacturing the same. According to one embodiment, a magnetic recording apparatus includes a magnetic recording medium, a magnetic head, and a control unit. The magnetic head includes a coil, a first magnetic pole, and a light emitting portion. The control unit performs a first operation and a second operation. In the first operation, the control unit records first servo position information in a first region of the magnetic recording medium. In the second operation, if the first condition is not satisfied, the control unit performs the repair operation. The first condition includes that a recording condition of the first servo position information is within a first range. In the repair operation, the control unit performs an erasing operation in which the light is irradiated from the light emission unit to the first region, and performs a re-recording operation in which the first servo position information is re-recorded in the first region after the erasing operation.

The present disclosure generally relates to a head assembly in a data storage device. The data storage device may include magnetic media embedded in the device or magnetic media from an insertable cassette or cartridge (e.g., in an LTO drive), where the head assembly reads from and writes to the magnetic media. During device operation, the magnetic media moves across the head assembly. The magnetic media experiences higher contact stress at certain points or portions of the head assembly. A sensor guard is coupled to the head assembly. The sensor guard comprises at least one chamfered surface or at least one stepped surface to decrease the contact stress between the magnetic media and the head assembly during device operation. The at least one chamfered or stepped surface may be disposed on a leading edge of the sensor guard.

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.

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

The present disclosure generally relates to a head assembly in a data storage device. The data storage device may include magnetic media embedded in the device or magnetic media from an insertable cassette or cartridge (e.g., in an LTO drive), where the head assembly reads from and writes to the magnetic media. During device operation, the magnetic media moves across the head assembly. The magnetic media experiences higher contact stress at certain points or portions of the head assembly. A sensor guard is coupled to the head assembly. The sensor guard comprises at least one chamfered surface or at least one stepped surface to decrease the contact stress between the magnetic media and the head assembly during device operation. The at least one chamfered or stepped surface may be disposed on a leading edge of the sensor guard.

On a magnetic tape, a plurality of servo patterns are recorded along a longitudinal direction. The servo pattern is at least one linear magnetized area pair. The linear magnetized area pair comprises a first linear magnetized area that is linearly magnetized and a second linear magnetized area that is linearly magnetized. The first linear magnetized area and the second linear magnetized area are inclined in mutually opposite directions with respect to a first virtual straight line along a width direction of the magnetic tape. The angle of inclination of the first linear magnetized area relative to the first virtual straight line is steeper than the angle of inclination of the second linear magnetized area.

A method for grinding a microwave-assisted magnetic recording (MAMR) head slider includes: a first grinding process: controlling the grinding disk to rotate at a first speed, controlling the MAMR head slider to move at a first moving speed, and applying a first force to the MAMR head slider to grind a predetermined end face; and a second grinding process: controlling the grinding disk to rotate at a second speed less than the first speed, controlling the MAMR head slider to move at a second moving speed less than the first moving speed, and applying a second force less than the first force to the MAMR head slider to grind the predetermined end face; wherein the second force in the last grinding is 0. This method can reduce the grinding marks on the ABS, improve the pole surface / ABS roughness, thereby improving the pole tip recession, and further improving the reliability of the MAMR head and extending the service life of the MAMR head.

According to one embodiment, a magnetic recording device includes a magnetic recording medium, a magnetic head configured to record information on the magnetic recording medium, and a controller configured to control the magnetic recording medium and the magnetic head. The magnetic head includes a coil, a first magnetic pole configured to generate a magnetic field according to a recording current supplied to the coil, and a light emitting section configured to irradiate the magnetic recording medium with a light to locally increase a temperature of the magnetic recording medium. The controller is configured to perform a first operation and a second operation. In the first operation, the controller is configured to record a first servo position information in a first region of the magnetic recording medium. In the second operation, the controller is configured to perform a repair operation if a first condition is not satisfied.

Various apparatuses, systems, methods, and media are disclosed to provide a thermally assisted magnetic recording (HAMR) media that includes a sacrificial layer and a corresponding etching process that minimizes head-to-media pitch. The medium may include the sacrificial layer and capping layer, where each of the layers is etched to reduce roughness. The sacrificial layer is configured to ensure an etch rate that allows selective etching and may be deposited on the capping layer and may remain along a grain boundary of the capping layer after etching. The remainder of the sacrificial layer may form a discontinuous layer including layer segments positioned along grain boundaries of the capping layer. The sacrificial layer may be made of a non-magnetic material different from a material of the capping layer or a material of a protective layer deposited on the etched capping layer.

The invention provides a method and a device for uniformizing a magnetic field of a hard disk degaussing coil. Generating a high-voltage pulse current, and converting the high-voltage pulse current into a transient strong pulse magnetic field; detecting transient strong pulse magnetic field intensity data between the space position of the center area of the degaussing coil and the space position of the edge area of the degaussing coil; through the magnetic conductive device, the magnetic field intensity is enhanced, leakage scattering magnetic flux near a port of the main degaussing coil module is captured, and scattering magnetic flux leakage attenuation is compensated; and the peak value of the central magnetic field is increased, and part of magnetic flux is pushed to an unsaturated marginal region, so that the homogenization of the magnetic field is enhanced.

According to one embodiment, a magnetic recording device includes a magnetic recording medium, a magnetic head configured to record information on the magnetic recording medium, and a controller configured to control the magnetic recording medium and the magnetic head. The magnetic head includes a coil, a first magnetic pole configured to generate a magnetic field according to a recording current supplied to the coil, and a light emitting section configured to irradiate the magnetic recording medium with a light to locally increase a temperature of the magnetic recording medium. The controller is configured to perform a first operation and a second operation. In the first operation, the controller is configured to record a first servo position information in a first region of the magnetic recording medium. In the second operation, the controller is configured to perform a repair operation if a first condition is not satisfied.

The present disclosure relates generally to a tape drive including a tape head. The tape head includes at least one same gap verification (SGV) module including a plurality of pairs of write and read transducers disposed on a substrate. In each pair, the write transducer includes a write pole having a height, and the read transducer includes a first shield disposed adjacent to the write pole. The write pole of each pair is spaced from the first shield by a distance greater than or equal to about 20% of the height of the write pole. The SGV module is configured to use the write transducer of each pair to write data to a tape and to use the read transducer of each pair to read verify the data written onto the tape such that the write and read transducers of each pair can operate simultaneously.

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