634 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.

To solve a problem that a time for moving a shutter may be needed when flushing is performed.SOLUTION: An recording device 1 includes: a recording head 40 which discharges an ink to a medium P from a plurality of nozzles 44 provided on a discharge surface 42a to perform recording; a cap part 61 capable of covering the discharge surface 42a; and a shutter 51 which may be displaced between a shield position where the shutter 51 covers the cap part 61 separated from the discharge surface 42a and an open position where the shutter 51 opens the cap part 61. The shutter 51 has: a facing surface 51a facing the discharge surface 42a in the shield position; and a discharged area DA where the ink is discharged from the nozzles 44 as flushing and which is provided on the facing surface 51a.SELECTED DRAWING: Figure 11

To suppress ink from leaking from a waste ink container.SOLUTION: An inkjet recording device comprises a recording head, a waste ink container and a suction mechanism. The waste ink container has a plurality of receiving ports for receiving ink, suction ports which are connected to the suction mechanism, and a plurality of suction air passages through which the receiving ports to be connected therewith are communicated with the suction port to enable suction airflow to pass therethrough. The plurality of suction air passages include a plurality of first air passages that are connected to a first receiving port that is one of the plurality of receiving ports and a plurality of second air passages that are respectively connected to a plurality of second receiving ports other than the first receiving ports of the plurality of receiving ports and extend from the second receiving ports to be connected therewith to the suction ports. The plurality of first air passages respectively do not extend to the suction ports and merge with the different second air passages, so as to communicate the first receiving ports with the suction ports.SELECTED DRAWING: Figure 8

The present invention relates to a thermal bubble type inkjet printer, comprising: a recording head having a plurality of nozzle rows for ejecting inks of a plurality of colors, the recording head reciprocating to print an image; the ink is supplied to the recording head and at least comprises black ink, cyan ink, magenta ink and yellow ink, and each color of ink is correspondingly matched with one nozzle row; a black nozzle row corresponding to black ink and a yellow nozzle row corresponding to yellow ink in the recording head are arranged at positions farthest from each other along the moving direction of the recording head; the inks in various colors contain dyes as color materials, and the static surface tension of the yellow ink is the lowest than that of the inks in other colors. According to the thermal bubble type ink-jet printer in the embodiment, even if a heat dissipation plate is not used, heat dissipation of the recording head can be effectively achieved, heat accumulation can be avoided, printed images can be prevented from being disordered, the speed that yellow ink permeates into a printing medium can be higher, and meanwhile the color uniformity of the printed images is guaranteed.

A heat-assisted magnetic recording head comprises a near-field transducer (NFT). The NFT comprises a near-field emitter configured to heat a surface of a magnetic disk, and a hybrid plasmonic disk. The hybrid plasmonic disk comprises a plasmonic region and a thermal region. The plasmonic region comprises a first material or alloy that is a plasmonic material or alloy. The thermal region comprises a second material or alloy that is different than the first material or alloy.

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.

Aspects of the present disclosure generally relate to a magnetic recording head assembly that includes an external alternating current (AC) source. A magnetic recording head of the magnetic recording head assembly includes a conductive structure between a main pole and a trailing shield. The conductive structure includes a conductive layer, and the conductive layer is nonmagnetic. The magnetic recording head assembly also includes an external AC source to supply AC current that flows through the conductive structure. In one aspect, the conductive structure is between a coil structure and the trailing shield, and the external AC source is coupled to the coil structure. The conductive structure and the external AC source facilitate consistently providing an enhanced AC writing field to facilitate effective and reliable writing, high ADC, high SNR, and reduced jitter.

Provided is a multifunction machine (10) that performs image recording on a sheet (12) by jetting ink onto the sheet. A multifunction machine (10) includes: a recording head (38) including a nozzle (39) that ejects ink; a carriage (40) that supports the recording head (38); a storage unit (80) that stores ink and is supported by the carriage (40) at a position above the nozzle (39); a valve (89) capable of moving between an open position at which an air communication port (88) for communicating the inside and the outside of the reservoir (80) is opened and a closed position at which the air communication port (88) is closed; a solenoid (93) that moves the valve (89); a state sensor that detects the state of the multifunctional machine (10) and outputs a detection signal on the basis of the detection result; and a controller (130) that controls the solenoid (93) to move the valve (89) to the closed position when it is determined that there is an abnormality in the multifunctional machine (10) on the basis of the detection signal.

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.

A heat-assisted magnetic recording head includes a near-field transducer, a waveguide, and a resonance enhancing feature. The near-field transducer is configured to focus and emit an optical near-field. The waveguide is configured to receive electromagnetic radiation and propagate the electromagnetic radiation toward and proximal to the near-field transducer. The resonance enhancing feature is disposed proximal to the near-field transducer and to a media-facing surface of the heat-assisted magnetic recording head. The resonance enhancing feature includes a first segment and a second segment disposed on opposite sides of the near-field transducer relative to a cross-track dimension of the heat-assisted magnetic recording head. Each of the first segment and the second segment of the resonance enhancing feature includes a liner and a filler. The liner of each of the first segment and the second segment at least partially faces the near-field transducer. The filler of each of the first segment and the second segment is disposed distal to the near-field transducer relative to the liner of the respective segment.

Provided is an ink jet recording method having excellent ejecting stability and capable of recording a fluorescent-colored image with an excellent color developability and abrasion resistance. The ink jet recording method includes a recording step of ejecting an aqueous ink from a recording head of an ink jet system and applying the aqueous ink to a recording medium and a heating step of heating the recording medium applied with the aqueous ink at a temperature TH (° C.). The aqueous ink contains a first resin particle and a second resin particle, the first resin particle is dyed with at least one fluorescent dye selected from the group consisting of a basic dye, a disperse dye and an oil-soluble dye, and contains a cyano group-containing unit, and the second resin particle does not include any coloring material therein.

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.

To provide a magnetic recording head including a read head with high signal output for use in a magnetic recording device.SOLUTION: A read head 500 includes a sensor 540 disposed on a media facing surface (MFS) and a spin generator 550 disposed away from the sensor and recessed from the MFS. The sensor and the spin generator are disposed on a non-magnetic layer 406. The sensor includes a free layer, and the spin generator includes at least one spin-orbit-torque (SOT) layer 510. The SOT layer is configured from a topological material such as BiSb. The sensor detects a read signal by using a first voltage lead line V+ and a second voltage lead line V-. The spin generator is configured to inject a spin current into the sensor via the non-magnetic layer by using a first current lead line I+ and a second current lead line I-. The shape of the non-magnetic layer is triangular or trapezoidal to further concentrate the spin current.SELECTED DRAWING: Figure 5A-5B

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 provide a magnetic recording / reproducing device and a method of adjusting the same for determining a flying height change of a thermally assisted magnetic recording head.SOLUTION: A method of adjusting a magnetic recording / reproducing device according to the embodiment is a method of adjusting a magnetic recording / reproducing device having a thermally assisted magnetic recording head and a magnetic disk, and includes: performing a first write operation at a first position on a recording surface; measuring a first error rate at a second position having a different radial directional position from the first position; measuring a second error rate after performing a second write operation; obtaining a first difference between the first error rate and the second error rate; measuring a third error rate at the first position; measuring a fourth error rate after performing a third write operation; obtaining a second difference between the third error rate and the fourth error rate; and determining a flying height change by comparing the first difference and the second difference.SELECTED DRAWING: Figure 1

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.

A recording device includes a recording head including a first nozzle group that ejects a first ink and a second nozzle group that ejects a second ink having a color different from that of the first ink, a moving unit that relatively moves the recording head and a medium in a moving direction intersecting with a nozzle alignment direction, and a control unit. The recording head includes a first nozzle range in which a distance between the first nozzle group and the second nozzle group in the moving direction is a first distance and a second nozzle range in which the distance is a second distance greater than the first distance. In a case in which recording is performed on a medium using nozzles belonging to the second nozzle range, when recording is performed with a secondary color through ejection of the first ink and the second ink.

To provide a magnetic head with improved spintronic devices.SOLUTION: The present invention relates to a magnetic recording head having a local or non-local SOT spintronic device for a magnetic medium, such as a magnetic media drive. In the case of the magnetic recording head having a local SOT spintronic device, a main pole, a shield, a buffer layer disposed on the main pole, a spin Hall layer disposed on the buffer layer, and an intermediate layer disposed on the spin Hall layer are included, and the buffer layer is made of a predetermined material. In the case of the magnetic recording head 1300 having a non-local SOT spintronic device, a main magnetic pole 1302, a shield 1304, a spin blocking layer 1310, a non-magnetic layer, and a spin-orbit-torque (SOT) layer 1308 are included, and the SOT layer is recessed from a medium facing surface (MFS) by a distance of about 20 nm to about 100 nm. The ratio of the length of the SOT layer to the thickness of the SOT layer is greater than 1. The SOT layer consists of BiSb.SELECTED DRAWING: Figure 10A