33results about "Disposition of heads" patented technology

An object of the present invention is to prevent a spacing between a magnetic head and a writing medium at low temperature from increasing to cause a writing / reading error, and to prevent the magnetic head element protruded by a temperature increase from colliding with small protrusions on a magnetic disk surface, and to prevent damage on the element, and to prevent the occurrence of thermal asperity. In order to attain the object, a magnetic head slider is provided, which includes a magnetic head element supported on a rotating magnetic disk via a gap to write or read information on the magnetic disk, and a heat source for heating the magnetic head element. A magnetic disk device is further provided, which includes a magnetic head slider.

A method of patterning magnetic material includes forming a ferromagnetic material layer containing one element selected from the group consisting of Fe, Co and Ni on a substrate, selectively masking a surface of the ferromagnetic material layer, and making nonferromagnetic. The making nonferromagnetic step includes exposing an exposed portion in halogen-containing reaction gas, changing magnetism of the exposed portion and a lower layer thereof by chemical reaction, and making the exposed portion a nonferromagnetic material region. A magnetic recording medium is fabricated by using the magnetic material patterning method and includes a plurality of recording regions made of ferromagnetic materials, each containing at least one element selected from the group consisting of Fe, Co and Ni, and a nonferromagnetic material region for separating the recording regions from each other. The nonferromagnetic material region is a compound region of the ferromagnetic material and halogen.

A read head, particularly suitable for a magnetic disc storage system, includes a read sensor having an air-bearing surface and an opposing top surface. The read head also includes a permanent magnet positioned adjacent the top surface of the read sensor for generating a magnetic bias field in the read sensor. The permanent magnet has a magnetization in a direction other than normal to the air-bearing surface of the read sensor.

A method of patterning magnetic material includes forming a ferromagnetic material layer containing one element selected from the group consisting of Fe, Co and Ni on a substrate, selectively masking a surface of the ferromagnetic material layer, and making nonferromagnetic. The making nonferromagnetic step includes exposing an exposed portion in halogen-containing reaction gas, changing magnetism of the exposed portion and a lower layer thereof by chemical reaction, and making the exposed portion a nonferromagnetic material region. A magnetic recording medium is fabricated by using the magnetic material patterning method and includes a plurality of recording regions made of ferromagnetic materials, each containing at least one element selected from the group consisting of Fe, Co and Ni, and a nonferromagnetic material region for separating the recording regions from each other. The nonferromagnetic material region is a compound region of the ferromagnetic material and halogen.

A magnetic recording medium capable of alleviating thermal fluctuation and improving the recording density includes a functional layer (12) containing a magnetic material, and a recording layer (11) overlying the functional layer and containing a magnetic material. The recording layer contains a plurality of magnetic grains (51) and a nonmagnetic material (52) existing among the magnetic grains, and the functional layer and the recording layer exert exchange coupling interaction in a direction making a substantially orthogonal relation with each other at the room temperature.

A thin-film includes an inductive element and a first and second magneto-resistive effect elements in which the first and second magneto-resistive effect elements are arranged in proximity to each other on a substrate, and one surface of the substrate perpendicular to the surface formed with the first and second magneto-resistive effect elements constitutes a slider surface, thereby providing appropriate hight of the magneto-resistive effect elements.

A magnetic head of a credit card identification terminal for reading card data which can prevent card data from being illegally acquired. The magnetic head includes a generally box-shaped sealed case having an open side; a bobbin with an electric wire wound thereon provided in the sealed case; a core member extending from the bobbin and having an end protruding to the outside of the sealed case through a through-hole formed through a side of the sealed case opposite the opening; a terminal pin connected to the wire wound on the bobbin; and resin filled in the hollow space in the sealed case, the terminal pin is embedded in the resin filled in the sealed case, one end of a flexible wiring substrate is connected to the terminal pin, and the other end of the flexible wiring substrate extends to the outside of the sealed case from the opening.

To make a soft magnetic underlayer of a double layered perpendicular magnetic recording medium thinner than heretofore while avoiding saturation. Assuming that Tb1 is the thickness of the soft magnetic underlayer of the double layered perpendicular magnetic recording medium, BS2 the saturation flux density of the same, Tm the thickness of a magnetic recording head's main pole 1 along a track direction in the vicinity of its floating surface, TWW the track width of the same, and BS1 the saturation flux density of the same, then Tb1<(BS1xTmxTWW) / 2(BS2x(Tm+TWW)) is satisfied.

Process for the production of an assembly having several magnetic heads and multiple head assembly obtained by said process.Production takes place of a first substrate (60) with first pole pieces (621, 622) and a second substrate (70) with second pole pieces (721, 733) and magnetic connectors (741, 742). One of the substrates is reversed and engaged on the other. The second substrate is thinned out so that the two pole pieces (721, 722) and the magnetic connectors (741, 742) are level or almost level. The assembly is completed by forming on the second thinned out substrate, magnetic circuit closing means and conductor coils.Application to the production of multiple magnetic head assemblies.

A recording and reproducing apparatus including a recording magnetic head and a reproducing magnetic head with their floating height lowered for high density recordation and reproduction is provided. An information recording medium is provided on which it is possible to densely record information and from which it is possible to densely reproduce information by lowering the floating height of the recording and reproducing heads. The information recording medium includes a flat substrate and a recording layer provided on the substrate. Servo patterns and management information are recorded as magnetic marks on the recording layer in advance by a servo writer or the like. Because the substrate needs no recessed and embossed patterns formed in it, the slider of the recording and reproducing apparatus can be floated at a constant floating height lower than conventionally over the whole area of the medium. During information recordation, the position of the slider is controlled on the basis of the magneto-optical signals from the magnetic marks. During information reproduction, the reproducing magnetic head controls the slider position on the basis of the magnetic leakage fields leaking from the magnetic marks.

A magnetic head of a credit card identification terminal for reading card data which can prevent card data from being illegally acquired. The magnetic head includes a generally box-shaped sealed case having an open side; a bobbin with an electric wire wound thereon provided in the sealed case; a core member extending from the bobbin and having an end protruding to the outside of the sealed case through a through-hole formed through a side of the sealed case opposite the opening; a terminal pin connected to the wire wound on the bobbin; and resin filled in the hollow space in the sealed case, the terminal pin is embedded in the resin filled in the sealed case, one end of a flexible wiring substrate is connected to the terminal pin, and the other end of the flexible wiring substrate extends to the outside of the sealed case from the opening.

A thin-film includes an inductive element and a first and second magneto-resistive effect elements in which the first and second magneto-resistive effect elements are arranged in proximity to each other on a substrate, and one surface of the substrate perpendicular to the surface formed with the first and second magneto-resistive effect elements constitutes a slider surface, thereby providing appropriate hight of the magneto-resistive effect elements.

A magnetic recording medium comprises, on a substrate, a recording auxiliary layer, a recording holding layer, recording control layer, and a recording layer. The recording layer is constructed by using a ferri-magnetic material having perpendicular magnetization. The data can be recorded at a super high density by using the recording and reproducing head of the present invention, because the recording layer has the perpendicular magnetization. The disappearance of data, which would be otherwise caused by the thermomagnetic relaxation phenomenon, is suppressed after recording the data, because the recording layer has large coercive force at the room temperature. The data, which is recorded at the super high density on the magnetic recording medium, can be reproduced by using a magnetic resistance element carried on the recording and reproducing head.

A magnetic recording medium constructed as a discrete track-type medium. The magnetic recording medium is constructed so that a track width of data recording tracks is equal to or smaller than a width produced by subtracting twice an off-track width of a magnetic head with respect to the data recording tracks during a recording of the recording data from a magnetic effective recording head width of the magnetic head. The track width is equal to or smaller than a width produced by subtracting twice an off-track width of the magnetic head with respect to the data recording tracks during a reproduction of the recording data from a magnetic effective reproduction head width of the magnetic head. A combined width of the track width and twice a width of the non-magnetic parts is equal to or larger than a combined width of the effective recording head width and twice the off-track width during the recording, and is equal to or larger than a combined width of the effective reproduction head width and twice the off-track width during the reproduction.

A thin film inductive write head for magnetic recording has a write gap formed as a lamination of alternating layers of a nonmagnetic gap layer and a ferromagnetic spacer layer. There are N gap layers and N−1 spacer layers, with each pole tip of the write head being located adjacent to a gap layer. The spacer layers in the gap structure are formed of a ferromagnetic material with a high saturation moment density (BS) that is close to the BS of the spacer material from which the pole tips are formed. Unlike the pole tips, the spacer layers are not part of a magnetic circuit and are magnetically isolated, i.e., completely surrounded by nonmagnetic gap material. The effect of the spacer layers is to effectively divide the gap into a plurality of smaller gaps. The write head with the laminated gap creates a write bubble that is narrower in the off-track direction and wider in the in-track direction.

The invention provides a disk drive. The disk drive includes a metal base that has a rectangular bottom wall and side walls formed on each side of the rectangular bottom wall, the side walls including a first side wall on a shorter side, a metal cover that is fixed to the metal base with a plurality of metal screws, including two screws disposed at opposite ends of the side wall, a gap being formed between an upper end of the first side wall and the metal cover, a magnetic disk disposed on the metal base, at a position offset from a center of the metal base in a longitudinal direction towards the first side wall, and a head. The first side wall and the metal cover are electrically connected at an intermediate position of the first side wall between said opposite ends of the first side wall.

A heat-assisted magnetic recording (HAMR) head gimbal assembly (HGA) protects the associated HAMR heating source from unwanted contact, such as from contact with an adjacent HAMR laser in response to a shock event. The HGA is configured such that the distance between the flexure and the top of a load beam flange is greater than the height of a submount associated with the heating source, and the height of the submount may also be greater than the height of the heating source, thus protecting against contact between adjacent heating sources.

The invention relates to a Seagate hard disk inner ring scratch data recovery method. The method comprises the steps that S1, cleaning the surface of a disk in the rotation process of the disk; S2, increasing the diameter of a magnetic head limiting column so as to limit the magnetic head to move to the scratched inner ring of the disc; S3, replacing the magnetic head of the hard disk with a brand-new magnetic head, and completing the assembly of the hard disk; and S4, performing power-on identification on the assembled hard disk, establishing a data recovery task, exporting all data in the hard disk, and finishing data recovery. The Seagate hard disk inner ring scratch data recovery method solves the problem that data recovery cannot be conducted on hard disk scratches in the prior art, and is a major breakthrough in the field of hard disk scratch data recovery.

Embodiments of the invention provide a microactuator, a head suspension assembly and a disk device. According to one embodiment, a microactuator includes a wiring substrate (40), and a piezoelectric element (50) connected to first and second connecting pads (70a, 70b) of the wiring substrate. The piezoelectric element includes a piezoelectric substrate (51), and a first electrode and a second electrode (56) provided on surfaces of the piezoelectric substrate. The piezoelectric substrate is provided with a first main surface (S1), a second main surface (S2) opposite to the first main surface and first and second side surfaces (SS2) opposite to each other. The first electrode includes a first electrode portion, a second electrode portion and a third electrode portion. The second electrode includes a fifth electrode portion (56a) and a sixth electrode portion (56b). The fifth electrode portion has an electrode end opposite to the first electrode portion, is provided on the first main surface, and faces the third electrode portion across the piezoelectric substrate. The piezoelectric element includes a protective insulating layer (60) covering at lease an end portion of the fifth electrode portion including the electrode end.

The invention relates to a method for recovering scratched data on the outer edge of a Seagate hard disk. The method includes: S1: cleaning the disk; S2: replacing the magnetic head; S3: cutting off the magnetic head corresponding to the scratched side of the disk; S4: closing the scratch Activate the magnetic head corresponding to the damaged side; S5: After installing the disk and the cut magnetic head, power on to confirm whether it can be recognized, if yes, enter S6; otherwise, replace the new matching magnetic head, return to S3; S6: Back up the firmware; S7: mirror the data of the magnetic head corresponding to the unscratched side; S8: stop the motor, and separate the circuit board from the hard disk when the circuit board is powered on; S9: replace the brand new magnetic head, And install and position the magnetic head stopper; S10: reassemble the hard disk body and the circuit board; S11: mirror the data on the scratched side. The invention proposes a data recovery method aiming at the scratches on the outer edge of the Seagate hard disk, which solves the problem in the prior art that the data cannot be recovered from the scratches on the hard disk.

A memory device has an information plane (32) for storing data bits in a magnetic state of an electro-magnetic material at an array of bit locations (31). The device further has an array of electro-magnetic sensor elements (51) that are aligned with the bit locations. The information plane (32) is programmable or programmed via a separate magnetic writing device (21). In particular a read-only sensor element (60) is described for a read-only magnetic memory.

There are provided a magnetic reproducing apparatus and a magnetic reproducing method, which are suitable for use in reproducing a magnetic tape by using, for example, a magnetoresistive element. A signal input from a data input 1 undergoes processing suitable for magnetic recording in a recording signal processing circuit 2, and is supplied to a predetermined precoder 3. The signal from the precoder 3 is recorded by a recording head 5 on a recording medium 6 such as a magnetic tape through a recording amplifier 4. The signal read from the recording medium 6 by the reproducing head 7 is supplied to a reproduction equalizer amplifier 8 to be amplified and equalized. The equalized signal is supplied to a circuit 10 having a channel characteristic of, for example, a Partial Response Class 4 (PR4) through an A / D converter 9. The output signal from the circuit 10 is supplied to a PR4 decoder circuit 11 to detect the signal. Further, the signal from the decoder circuit 11 is sent to a reproduction signal processing circuit 12. Then, the signal is output to a data output 13 after executing demodulation, restoration to the original form from the packetized state of the signal, error correction and the like. Accordingly, the magnetoresistive element conventionally used for reproducing a hard disk and the like may be applied to reproduction of a magnetic tape.

The MAMR head includes a main magnetic pole, a spin torque oscillator (STO) positioned above the main magnetic pole, and a write coil coupled to the main magnetic pole. The STO generates a high-frequency magnetic field on the magnetic medium. The controller is configured to provide a first bias current at a first bias current level to the STO and further provide a second bias current at a second bias current level to the STO. The controller is further configured to time the second bias current to coincide with a current overshoot within the write coil.