Class / Patent application number | Description | Number of patent applications / Date published |
360294000 |
Disk record
| 100 |
360291000 |
Tape record | 3 |
20100073823 | PIEZOELECTRIC ACTUATOR, HEAD SLIDER AND MAGNETIC DISK DRIVE - A piezoelectric actuator includes a piezoelectric body; a first and a second electrode for applying an electric field to the piezoelectric body in order to polarize the piezoelectric body in a first direction at an elevated temperature, at least one of the first and the second electrode including a material whose resistivity decreases with elevation of the temperature; and a third and a fourth electrode for applying an electric field to the piezoelectric body in a second direction across the first direction of the polarization of the piezoelectric body in order to actuate the piezoelectric body. | 03-25-2010 |
20080253031 | Magnetically Preloaded Anti-Rotation Guide for a Transducer - A transducer positioning apparatus is provided that supports a read/write head on a data storage machine and biases the head against rotation. The transducer positioning apparatus may comprise a base that includes a linear drive motor and a support frame to which the read/write head is secured. The support frame is reciprocally driven by the linear drive motor relative to the base. A magnetic coupling is provided between the base and the support frame that resists movement of the frame other than the reciprocal movement of the support frame relative to the base. A method is also disclosed for magnetically biasing a movable head of a transducer against rotation. | 10-16-2008 |
20090067097 | TAPE DRIVE SYSTEM - A tape drive system according to one embodiment includes a support for engaging a tape; and a head directly opposing the support such that a tape engaging the support is positioned between the head and the support, the head being for performing at least one of reading from a tape and writing to a tape, wherein, during an operation period when the head is reading from or writing to a tape, the head is positioned such that at least one of the following occurs: the head does not contact the tape for a majority of the operation period; the head does not contact the tape for at least a portion of the operation period; and the head engages the tape for at least a portion of the operation period, the head pressing the tape towards the support when engaging the tape. | 03-12-2009 |
Entries |
Document | Title | Date |
20090231761 | HEAD SUSPENSION ASSEMBLY AND STORAGE DEVICE - A head suspension assembly includes a head suspension, a load beam having a protrusion, a flexure attached to a surface of the head suspension at a back surface of the flexure and a support plate defined on the flexure. A head slider is secured to the support plate. The support plate and head slider are secured to the load beam over the protrusion. The support plate extends outward from a contour of the head slider, and has at least two openings corresponding to desired locations of corners of the head slider, and a window formed in the head suspension behind the flexure, so that the head slider can be accurately aligned with respect to the openings when the head slider is adhered to the support plate. | 09-17-2009 |
20090251826 | HARD DISK DRIVE WITH RECESSED ACTUATOR JOINT - Components and assemblies for a hard disk drive (HDD) with a recessed actuator joint are described. A rotary actuator hub assembly comprises a shaft having a flange, and a pivot seat on which the flange is seated when the shaft is fastened to an HDD chassis. According to an embodiment, the pivot seat has at least one “contact-reducing feature” recessed from the surface of the pivot seat at which the seat contacts the flange. A purpose of the contact-reducing feature(s) of the pivot seat is to weaken the joint between the actuator hub assembly and the chassis, thereby mechanically loosening the rotary actuator assembly from the chassis. Consequently, movements to and vibrations from the chassis are less likely to be transmitted to the rotary actuator assembly and, ultimately, to the HDD read/write head(s). | 10-08-2009 |
20090262463 | DISK DRIVE SUSPENSION - A suspension is provided with a base plate, load beam, and flexure. The base plate includes a boss portion, a first region situated on a side closer to a slider with respect to a center of the boss portion, and a second region situated on a side more remote from the slider. A pair of first projections are formed in the first region. A pair of second projections are formed in the second region. The projections project in the thickness direction of the base plate. The boss portion is inserted into a hole in an actuator arm, and the projections contact a suspension support portion of the actuator arm. The boss portion is pressurized from inside to be enlarged, whereby the base plate is fixed to the inner peripheral surface of the hole of the actuator arm. | 10-22-2009 |
20100128399 | HARMONIC MEASUREMENT FOR HEAD-DISK SPACING CONTROL USING USER DATA - A hard disk drive that determines a flying height from a ratio of a first harmonic transfer function and a third harmonic transfer function. The transfer functions can be determined from a response to an impulse function. The impulse function (also known as an impulse response) can be a playback waveform de-convolved by channel data sequence. Any change in the ratio of the first and third harmonic transfer functions corresponds to a change in the flying height. The disk drive may utilize the transfer function ratios in a feedback routine to control the flying height. | 05-27-2010 |
20100165515 | WIRING CONNECTING STRUCTURE FOR PIEZOELECTRIC ELEMENT, WIRING CONNECTING METHOD, PIEZOELECTRIC ACTUATOR, AND HEAD SUSPENSION - A wiring connecting structure for a piezoelectric element is capable of performing wiring to the piezoelectric element without deteriorating the quality and reliability of the piezoelectric element. The piezoelectric element is arranged between a base and head of an object, to minutely move the head in a sway direction according to deformation that occurs on the piezoelectric element in response to a voltage applied from a terminal to an electrode of the piezoelectric element. The wiring connecting structure includes first and second liquid stoppers arranged between the terminal and the electrode, the second liquid stopper being arranged outside the first liquid stopper. The wiring connecting structure also includes an adhesive part to connect the electrode to the terminal. The adhesive part has a conductive adhesive part defined by the first liquid stopper and a sealing adhesive part defined by the second liquid stopper. The sealing adhesive part seals the first liquid stopper and conductive adhesive part. | 07-01-2010 |
20100271735 | Wireless Microactuator Motor Assembly for Use in a Hard Disk Drive Suspension, and Mechanical and Electrical Connections Thereto - A microactuator assembly for a hard disk drive head suspension has an expandable base of stainless steel sheet material defining a negative lead affixed to the negative electrode on the bottom surface of a piezoelectric element, and a piece of stainless steel sheet material defining a positive lead attached to the positive electrode on the top surface of the piezoelectric element. The leads may be affixed directly to the piezoelectric element via conductive adhesive. The microactuator assembly can be assembled separately, and then laser welded into place on a suspension. A bond pad made of stainless steel sheet material extends from the flexible circuit, is electrically connected to the microactuator driving voltage conductor within the flexible circuit through a via, and is electrically isolated from the suspension substrate by an insulating film. The microactuator unit positive lead is mechanically and electrically connected to the bond pad via laser welding. | 10-28-2010 |
20120243127 | MAGNETIC HEAD, MAGNETIC HEAD ASSEMBLY, AND MAGNETIC RECORDING/REPRODUCING APPARATUS - According to one embodiment, a magnetic head includes a reproducing section. The reproducing section detects a medium magnetic field recorded in a magnetic recording medium. The reproducing section includes a stacked film and a magnetic field application unit. The stacked film includes a first magnetization layer and a second magnetization layer. The first magnetization layer has a perpendicular magnetic anisotropy. A magnetization of the first magnetization layer being is fixed. The second magnetization layer is stacked with the first magnetization layer and oscillates. The magnetic field application unit is stacked with the stacked film and applies a bias magnetic field having a component along the first axis to the stacked film. A resistance of the stacked film changes in accordance with the medium magnetic field when a current not less than a value at which the second magnetization layer oscillates is passed. | 09-27-2012 |
20150116866 | ROTARY ACTUATOR WITH COIL WINDING PORTIONS HAVING OPPOSING CURRENT FLOW DIRECTIONS - A rotary actuator for positioning a recording head in a data storage mechanism and that includes first and second cylindrical subassemblies separated by an air gap. One of the subassemblies includes a magnetically conductive core with an electrically conductive coil wrapped thereover to enable first and second current flow directions in the circuit. The other of the subassemblies includes a magnetically conductive core and at least one magnet secured thereto. Transmission of an electric current through the electrically conductive coil induces rotation of one of the subassemblies relative to the other of the subassemblies to rotate the recording head about an axis that is perpendicular to recording media on the recording head. The disclosed rotary actuator facilitates quick and accurate recording head position changes due to low inertia of the rotating subassembly as well as reduced inductance and symmetrical mass distribution of the actuator. | 04-30-2015 |
20150124355 | RECORDING HEAD WITH PIEZOELECTRIC CONTACT SENSOR - Example embodiments include an apparatus that has a piezoelectric contact sensor. The piezoelectric contact sensor includes a semiconductor device having a semiconductor material that defines a channel through which current can flow. The piezoelectric contact sensor also includes a piezoelectric element coupled to the semiconductor material. The semiconductor material is configured to modulate the current channel in response to compressive stress waves at the contact sensor. Other example embodiments include an apparatus that has a slider having an air-bearing surface, a write head integral to the slider, and a piezoelectric contact sensor that includes a semiconductor device and a piezoelectric element. | 05-07-2015 |