427 results about "Recording head" patented technology

Embodiments of the invention provide a write head for perpendicular recording in which the magnetic field intensity applied at a read element is reduced with larger write-field gradients and the distance between a write element and a read element is small. In one embodiment, a pair of magnetic bodies for shielding a read element are provided on the leading and trailing sides of the read element respectively and whichever one of the two shields is the longer in the length from the air bearing surface is shorter than the length up to the back contact position PBK at which a main pole and an auxiliary pole are connected.

The present disclosure generally relates to a magnetic recording head comprising a read head. The read head comprises a first sensor disposed at a media facing surface (MFS) comprising at least one free layer, a second sensor disposed at the MFS comprising at least one free layer, a first spin generator spaced from the first sensor and recessed from the MFS, and a second spin generator spaced from the second sensor and recessed from the MFS. The first and second spin generators each individually comprises at least one spin orbit torque (SOT) layer. The SOT layer may comprise BiSb. The first and second sensors are configured to detect a read signal using a first voltage lead and a second voltage lead. The first and second spin generators are configured to inject spin current through non-magnetic layers to the first and second sensors using a plurality of current leads.

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.

The present disclosure generally relates to a magnetic recording system comprising a magnetic recording head that provides a low resistance cross-track current path at the trailing side of the main pole. A bias current may be driven through the path to enhance the magnetic write field to the magnetic recording media. The current is driven by an alternating current (AC) source external to the head. In some embodiments, the cross-track current going through the low resistance path enables high amounts of current to be utilized without break down of the magnetic recording head.

The present disclosure generally relates to a magnetic recording head comprising one or more spin-orbit torque (SOT) devices, the SOT devices each comprising a bismuth antimony (BiSb) layer. The magnetic recording head comprises a SOT device comprising a first shield extending to a media facing surface (MFS), a seed layer disposed over the first shield, the seed layer being disposed at the MFS, a free layer disposed on the seed layer, the free layer being disposed at the MFS, a bismuth antimony (BiSb) layer disposed over the free layer, the BiSb layer being recessed from the MFS, a second shield disposed over the BiSb layer, the second shield extending to the MFS, and a shield notch coupled to the second shield, the shield notch being disposed between the first shield and the second shield. The magnetic recording head may be a two-dimensional magnetic recording head comprising two SOT devices.

The present disclosure generally relates to a magnetic media drive comprising a magnetic recording head. The magnetic recording head comprises a main pole disposed at a media facing surface (MFS), a shield disposed at the MFS, a spin blocking layer disposed between the shield and the main pole, at least one non-magnetic layer disposed between the main pole and the shield, the at least one non-magnetic layer being disposed at the MFS, and at least one spin orbit torque (SOT) layer disposed over the at least one non-magnetic layer, the SOT layer being recessed a distance of about 20 nm to about 100 nm from the MFS. A ratio of a length of the SOT layer to a thickness of the SOT layer is greater than 1. The at least one SOT layer comprises BiSb.

A sub-tank is disposed in a flow path from a main tank to a recording head. The sub-tank includes a tank main body, a level sensor and a flow restricting part. In the tank main body, ink replenished from the main tank is contained. The level sensor detects a liquid level of the ink in the tank main body. The flow restricting part restricts flowing of the ink in an upper-and-lower direction in the tank main body. The flow path is connected to the tank main body at a position below the flow restricting part. The flow restricting part is disposed at a position below a lower limit level of the liquid level.

The present disclosure generally relates to a magnetic recording system comprising a magnetic recording head that provides a low resistance cross-track current path at the trailing side of the main pole. A bias current may be driven through the path to enhance the magnetic write field to the magnetic recording media. The current is driven by an alternating current (AC) source external to the head. In some embodiments, the cross-track current going through the low resistance path enables high amounts of current to be utilized without break down of the magnetic recording head.

The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a first current flow in a cross-track direction through a trailing shield. In one or more embodiments, a second current flows in a cross-track direction around the main pole. The magnetic recording device comprises a main pole disposed between a trailing shield, a leading shield, and side shields. A trailing gap is disposed between the side shields and the trailing shield. A high moment seed layer is disposed between the main pole and the trailing shield. A first insulation layer is disposed within the trailing shield and directs the first current through the trailing shield, guided to the proximity of the main pole. A second insulation layer, disposed below the trailing shield, directs the second current through the trailing shield, or alternatively through the side shields and around the main pole.

The present disclosure generally relates to a magnetic recording head comprising a read head. The read head comprises a sensor disposed at a media facing surface (MFS) and a spin generator spaced from the sensor and recessed from the MFS. The sensor and spin generators are disposed on a non-magnetic layer. The sensor comprises a free layer and the spin generator comprises at least one spin orbit torque (SOT) layer. The SOT layer may comprise topological material such as BiSb. The sensor is configured to detect a read signal using a first voltage lead and a second voltage lead. The spin generator is configured to inject spin current through the non-magnetic layer to the sensor using a first current lead and a second current lead. The shape of the non-magnetic layer is a triangular or trapezoidal shape to further concentrate spin current.

The present embodiments relate to a near-field transducer (NFT) for a hard disk drive write head with a parabolic waveguide blocker. The waveguide blocker can include a parabolic curved surface in a center portion of a first side of the waveguide blocker and a first side comprising a slope angle of between 10-90 degrees. The waveguide blocker can be configured to reduce electromagnetic radiation from the waveguide core and recycle a scattering field emitting from the NFT to mitigate a thermal background in a recording medium and improve a thermal gradient to increase an area density capacity (ADC) of the hard disk drive write head.

A slider for a data storage device may include a trailing pad comprising a recording head, an outer surface, and an inner surface, wherein the outer surface is at the media-adjacent level and the inner surface is at the first recessed level. The slider may further include particle-blocking structure comprising a hole in the inner surface of the trailing pad, wherein a bottom surface of the hole is at the second recessed level, and an island blocker situated within the hole, wherein a media-facing surface of the island blocker is at the media-adjacent level, wherein the recording head is situated between the island blocker and a trailing edge of the slider. Also disclosed are data storage devices comprising sliders having particle-blocking structures comprising a hole and an island blocker. Also disclosed are methods of manufacturing sliders having particle-blocking structures comprising a hole and an island blocker.

A recording element substrate is used in which a liquid chamber is formed between a substrate and a channel-formation member. A discharge orifice configured to discharge liquid in the liquid chamber is provided. The substrate includes at least a first layer, and a second layer that is farther away from the liquid chamber than the first layer. A first heater configured to heat and discharge the liquid by application of a drive pulse, and a temperature sensor that is disposed with at least a portion overlapping the liquid chamber in plan view, are provided in the first layer. A second heater that is disposed with at least a portion overlapping the temperature sensor in plan view is provided in the second layer.

To improve a thermal gradient of a near-field transducer (NFT) and increase an areal density capacity of a HAMR head.SOLUTION: An NFT includes a main pole (MP) 302, a two-layer transducer 304 positioned adjacent to the MP, a waveguide core 306, and a parabolic waveguide blocker 308 positioned adjacent to the waveguide core, wherein the parabolic waveguide blocker includes a parabolic shape having a surface exposed to an air-bearing surface (ABS) of a write head. The parabolic waveguide blocker reduces electromagnetic radiation from the waveguide core, recycles a scattering field emitted from the NFT to mitigate a thermal background in a recording medium, improves a thermal gradient, and increases an areal density capacity (ADC) of a hard disk drive write head.SELECTED DRAWING: Figure 3A

To enable relatively simple determination of the ink discharge mode in an ink jet recording apparatus.SOLUTION: A recording apparatus according to the present invention is the recording apparatus that includes a recording head in which a plurality of nozzles that can discharge ink are arranged, and includes: a first detection unit that detects a predetermined parameter for each nozzle; a determination unit that determines the ink discharge state at the corresponding nozzle by comparing a signal based on a detection result of the first detection unit with a threshold; and a threshold generation unit that generates the threshold. The apparatus has, as operation modes, a first mode in which the threshold is a variable value, and a second mode in which the threshold is a fixed value. In the first mode, the determination unit performs a predetermined number of determinations for each nozzle, the threshold generation unit changes the threshold in each of the predetermined number of determinations, and the threshold for the second mode is determined on the basis of the results of the predetermined number of determinations.SELECTED DRAWING: Figure 1

The present invention provides a recording head that can update eigenvalues ​​while suppressing increases in memory capacity and head size. [Solution] The recording head 810 has a memory section 20 configured using a fuse element or an antifuse element. The memory section 20 has a main memory circuit M0 for storing eigenvalues ​​related to the recording head 810, and correction memory circuits M1 and M2 for storing correction values ​​for updating the eigenvalues.

A recording apparatus includes a liquid container configured to contain, outside a recording area of the recording apparatus, liquid to be supplied to a recording head configured to perform recording by discharging the liquid to a recording medium in the recording area, a maintenance unit disposed outside the recording area, including a suction unit configured to suck the liquid from the recording head, and configured to carry out maintenance of the recording head, and a liquid reservoir portion below the liquid container and the maintenance unit.

This technology can help reduce the increase in discarded ink. [Solution] The recording head is provided with a first discharge port capable of discharging a first ink and a second discharge port capable of discharging a second ink; a cap that contacts the discharge port surface on which the first and second discharge ports are formed and covers the area including the first and second discharge ports; a suction means for reducing the pressure inside the cap; an discharge control means that, with the cap in contact with the discharge port surface, generates negative pressure inside the cap using the suction means to discharge ink into the cap from each discharge port; and, when the discharge of ink by the discharge control means is performed, an ejection control means that first discharges the first ink into the cap by performing a preliminary discharge from the first discharge port, and then first discharges the second ink into the cap by performing a preliminary discharge from the second discharge port.

To provide an inkjet recording method capable of recording a high quality image suppressed in generation of bleeding and irregularity when recording on a hardly- or non-absorptive recording medium by one pass.SOLUTION: There is provided an inkjet recording method of respectively discharging any of a clear ink, a reaction liquid, and a pigment ink of an aqueous liquid composition from a recording head to apply onto a recording medium so as to record an image. Application of each liquid composition to a unit region is done by one relative scanning of the recording head and the recording medium. The clear ink contains a resin, the reaction liquid contains a polyvalent metal salt as a reagent, and the pigment ink contains a pigment. The inkjet recording method includes: a clear ink-applying process of applying the clear ink onto the recording medium; a drying process of drying the clear ink applied onto the recording medium; a reaction liquid-applying process of applying the reaction liquid onto the recording medium; and a pigment ink-applying process of applying the pigment ink onto the recording medium, in this order.SELECTED DRAWING: Figure 1

This invention provides an inkjet recording method that enables the recording of images with minimal misalignment of grid lines, even when recording images using a recording head having overlapping sections where the end ejection ports of adjacent ejection port rows overlap. [Solution] An inkjet recording method comprising the step of discharging aqueous ink from end discharge ports constituting an overlapping portion, allocated to a first discharge port row and a second discharge port row, to record an image on a recording medium, wherein the viscosity of the aqueous ink is 4.0 mPa·s or more, and the water-soluble organic solvent contains a water-soluble organic solvent (A) with a vapor pressure of 0.030 Pa or more and 0.200 Pa or less at 25°C, and a water-soluble organic solvent (B) with a vapor pressure of 1.000 Pa or more at 25°C, wherein the content (mass%) of water-soluble organic solvent (A) is 0.30 times or more by mass ratio to the content (mass%) of water-soluble organic solvent (B).

A test pattern used for imaging in the information terminal's imaging section to adjust printing characteristics of a printing device that includes a recording head, wherein a density pattern for adjusting printing density, as one of the printing characteristics, is included in an imaging target region of the test pattern and the arrangement region of the density pattern within the imaging target region is symmetrical with respect to either the center of the imaging target region or a straight line passing through the center as the reference.

A recording head includes plural nozzle units. A nozzle unit position detecting unit detects positions of the nozzle units on the basis of a scanned image of a test pattern. The test pattern includes patch images corresponding to the plural nozzle units. Each of the patch image includes a first edge along a secondary scanning direction, and a second edge that crosses the first edge. On the basis of a density distribution of the test pattern, the nozzle unit position detecting unit determines an intersection point between the first edge and the second edge in each of the patch images, and determines respective positions of the plural nozzle units on the basis of positions of the determined intersection points.

A recording apparatus including a recording head, a circulation unit, and a control unit is used. The recording head includes an ejection port and a pressure chamber filled with ink, and performs a recording operation by ejecting ink from the ejection port. The circulation unit performs a circulation operation to circulate ink through a circulation path including a pressure chamber. In a state in which the circulation unit is performing the circulation operation, the control unit acquires temperature information that is information related to the temperature of the recording head, and determines a circulation state of the ink in the circulation path based on the information related to the temperature.

The present disclosure relates to the pretreatment of a magnetic recording head assembly for a magnetic media drive. The magnetic recording head assembly comprises a slider with a media-side surface (MFS), an upper surface opposite the MFS, a trailing-edge surface adjacent to the upper surface, and an optical grating arranged on the trailing-edge surface. A vertical resonator surface-emitting laser device (VCSEL device) is mounted on the trailing-edge surface of the slider. The VCSEL device is aligned with the optical grating. A magnetic recording head, comprising a waveguide and a near-field transducer (NFT) coupled to the waveguide, is arranged on the trailing-edge surface of the slider. The VCSEL device is capable of emitting a plurality of phase-coherent lasers onto the optical grating.The optical grating is capable of directing the emitted laser beams at approximately 90 degrees to the waveguide.

The invention relates to a printing apparatus and a control method thereof, which can reduce liquid consumption, medium consumption and printing time for printing a test pattern. The printing apparatus includes a recording head, a control unit, and a detection unit. The control section performs control so as to form an intermediate image including a marker section detectable by the detection section on a medium on the basis of an input image during a cycle among a plurality of cycles, and performs control so as to form a marker section on the medium on the basis of the intermediate image during a cycle following the cycle during the cycle. A remaining image of the printed image other than the intermediate image is formed on the medium. The detection part detects the state of the identification part. The control unit is capable of executing a process based on the state of the identification unit detected by the detection unit.

Configuring the recording head to be movable in the direction of platen gap adjustment while also incorporating a mechanism to adjust the posture of the recording head would lead to increased costs and a larger size for the device. [Solution] The guide frame comprises a first guide portion that guides the recording unit along a first axis, and a second guide portion that is spaced apart from the first guide portion in the width direction, which is the direction intersecting the media transport direction at a position opposite to the recording portion, and which guides the recording unit along the first axis. The recording unit comprises a first guided portion guided by the first guide portion, and a second guided portion guided by the second guide portion, the second guided portion also serving as a rotation mechanism that rotates the recording unit with the first guide portion as a pivot point when viewed from the first axis.

To solve such a conventional problem that a movement length of a carriage became long in a main scanning direction, and improvement of through-put was difficult.SOLUTION: A recording device 10 comprises: a carriage 41 on which a recording head 20 for discharging a photocurable ink onto a medium B and a light source 30 for radiating light that cures the photocurable ink discharged during an approach path motion are mounted, and which is capable of reciprocating in a main scanning direction; and a control part 80 that controls the motion of the carriage 41. The control part 80 specifies a movement range at a step S140 and controls the movement of the carriage 41 so that the irradiation range of light by the light source 30 does not deviate from a region on the medium B to which the photocurable ink has been discharged, when reversing from the approach path motion to the return path motion.SELECTED DRAWING: Figure 3

An image recording apparatus includes a belt passed around a drive pulley and a driven pulley, a support member configured to support a recording head and fixed to the belt, a holder member, having a claw part, configured to hold the driven pulley, and a frame having a first opening for the claw part to penetrate. The holder member is attached to the frame such as to be movable relative to the drive pulley. The first opening has an enlarged opening portion allowing the claw part to pass through without engaging with the frame on one side closer to the drive pulley. At least a portion of the claw part is positioned within a part of the first opening excluding the enlarged opening portion in a state where the holder member is positioned in a predetermined location closer to the drive pulley.

To appropriately detect a temperature of a recording head in a recording apparatus having a heating mechanism.SOLUTION: A recording apparatus includes: a recording head that discharges liquid onto a recording medium to form an image; heating means for heating the recording medium; a first temperature sensor provided on the recording head to detect the temperature of the recording head; and a second temperature sensor for detecting the temperature around the recording head. After the power of the recording apparatus is turned on and before the heating means is driven, a correction value for correcting the temperature of the recording head is calculated on the basis of detection results of the first temperature sensor and the second temperature sensor.SELECTED DRAWING: Figure 6

To provide an image forming apparatus capable of adjusting a recording head to an appropriate temperature.SOLUTION: An image forming apparatus includes: a recording head 21; a temperature sensor 55 that detects the temperature of the recording head 21; and a temperature adjustment mechanism 23. The temperature adjustment mechanism 23 includes: a heat exchange unit 31 that performs heat exchange with the recording head 21; a tank 33 that stores fluid; a circulating conduit 35 including a forward conduit 35a and a return conduit 35b; a conduit 39 for heating and a conduit 41 for cooling that are provided on the forward conduit 35a; a heating unit 43 that heats the fluid flowing through the conduit 30 for heating; a cooling unit 45 that cools the fluid flowing through the conduit 41 for cooling; and switching valves 47 and 49 that are provided on the forward conduit 35a. The image forming apparatus is configured to: switch the switching valves 47 and 49 on the basis of the temperature detected by the temperature sensor 55, and send the fluid to the heat exchange unit 31 through the conduit 39 for heating or the conduit 41 for cooling to perform heat exchange with the recording head 21.SELECTED DRAWING: Figure 2