摘要:
A single disk drive uses data mirroring techniques to store data within the drive. Each piece of data received by the disk drive for storage is written to at least two different storage locations within the drive. Preferably, each of the different storage locations occurs on a different disk surface, but within the same cylinder, of the drive. In one embodiment, each disk surface in the disk drive is divided into N distinct regions that are each 360/N degrees out of phase with one another. Each region on a disk surface is aligned with a corresponding region on each other disk surface in the disk drive. Data stored in each region on a disk surface is then mirrored within a different region on a different disk surface in the drive. Using such a technique allows a significant reduction in latency to be achieved during subsequent read operations.
摘要:
A method of adjusting frequency based audio levels in an electronic device to compensate for hearing loss without the aid of additional apparatus is disclosed. The device supplies a user with audio stimulus, such as a tone at a set frequency and decibel level, and prompts the user with a question as to whether the tone was audible. This process repeats with multiple stimuli of varying frequency and decibel level. Using the feedback provided by the user in response to the stimulus, the device creates an equalization profile for the user which adjusts the volume of certain frequencies of sound emitted by the device or alters the frequencies altogether in a manner which is consistent with providing audible sound to that user. The user can repeat this calibration process depending on different noise environments and therefore can have a multitude set of equalization profiles. For example the background noise in a car is different than at home or at work and can be adjusted differently.
摘要:
An optical laser-activated TAMR (Thermal Assisted Magnetic Recording) slider, when normally mounted on a flexure, has an optical laser as well as other elements of its optical system exposed and subject to damage by mechanical shocks. The stand-off protective device disclosed herein, formed separately and attached to the flexure, or formed as part of the flexure itself, can protect the optical elements of such a slider from these shocks, particularly from inadvertent contacts with adjacent sliders or mechanical limiters.
摘要:
A method of forming a TAMR (Thermal Assisted Magnetic Recording) write head that uses the energy of optical-laser generated edge plasmons in a plasmon antenna to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. The method incorporates forming a magnetic core within the plasmon antenna, so the antenna effectively becomes an extension of the magnetic pole and produces a magnetic field whose maximum gradient overlaps the region being heated by the edge plasmons generated in the conducting layer of the antenna surrounding the antenna's magnetic core.
摘要:
A device to facilitate Thermally Assisted Magnetic Recording (TAMR), and a method for its manufacture, are described. One or more cylindrical lenses are used to focus light from a laser diode onto a wave-guide and a nearby plasmon antenna. Five embodiments of the invention are described, each one featuring a different way to couple the laser light to the optical wave-guide.
摘要:
An optical laser-activated TAMR (Thermal Assisted Magnetic Recording) slider, when normally mounted on a flexure, has an optical laser as well as other elements of its optical system exposed and subject to damage by mechanical shocks. The stand-off protective device disclosed herein, formed separately and attached to the flexure, or formed as part of the flexure itself, can protect the optical elements of such a slider from these shocks, particularly from inadvertent contacts with adjacent sliders or mechanical limiters.
摘要:
A vertically stacked DFH design in a read/write head is disclosed that allows independent control of write gap protrusion and read gap protrusion. A first heater is formed in an insulation layer proximate to a sensor in a read head. A second heater is formed in a second insulation layer proximate to the write pole tip in a main pole layer. The two heaters are connected in series or in parallel through leads to a power source that activates the heaters. In one embodiment, the heaters have a fixed resistance ratio. Preferably, there are two drivers in the power source so that a first power can be applied to the first heater and a second power can be applied to the second heater to enable an adjustment of reader protrusion/writer protrusion or gamma ratio. Fast reader and writer actuation is achieved and low power consumption is realized.
摘要:
Various embodiments of a TAMR head having a magnetic core antenna (MCA) with a recessed plasmon layer are disclosed. An end of the plasmon layer is separated from the ABS by a magnetic layer that transmits the plasmon mode from the plasmon layer and transmits magnetic flux from an adjacent main pole layer. Both of the MCA and magnetic layer may have a triangular shape from an ABS view. There may be a non-magnetic separation layer between the MCA magnetic core and the main pole. Furthermore, a magnetic shield may be included with a side at the ABS, a side facing an end of a waveguide that transmits electromagnetic radiation to the MCA, and a side facing an edge of the plasmon layer. The recessed plasmon layer allows an improved overlay of the thermal heating spot on the magnetic field gradient at the magnetic medium that provides better TAMR performance.
摘要:
We describe a system for electric field assisted magnetic recording where a recordable magnetic medium includes a magnetic recording layer of high coercivity and vertical magnetic anisotropy that is adjacent to an electrostrictive layer which can be placed in a state of stress by a electric field or which is already pre-stressed and which pre-stress can be turned into strain by an electric field. When the magnetic medium is acted on simultaneously by a magnetic writing field and an electric field, the stress in the electrostrictive layer is transferred to a magnetostrictive layer which is the magnetic recording layer by itself or is coupled to the magnetic recording layer, whereupon the magnetic recording layer is made more isotropic and more easily written upon. Residual stresses in the electrostrictive layer can then be removed by an additional electric field of opposite sign to the stress-producing field.
摘要:
The preferred embodiments of the present invention are devices and processes for producing high resolution lithography or pattern formation on the nanometer scale, using a voltage-biased probe that is slider-mounted along with, or separate from but linked to, a magnetic read head within a HDD mechanism. The probe is guided and positioned over a target layer by the motion of the read head which is, itself, guided by signals from servo tracks on a magnetic layer that activate an electromechanical servomechanism within the HDD. An electric field produced by the probe is capable of modifying the surface of the target layer over which the probe flies either directly, or by current induced or thermally induced effects. Targets such as amorphous or crystalline silicon can be hydrogen passivated and the electric field will produce oxidized or anodized lines with nanometer resolution.