Abstract: Embodiments of the present invention generally relate to a HAMR device having two temperature sensors. The first temperature sensor is disposed adjacent a waveguide and is about two or more micrometers away from an air bearing surface. The first temperature sensor has a length, a width and a thickness, and the length is greater than the width and the thickness. The length of the first temperature sensor is substantially perpendicular to the waveguide.

Abstract: Embodiments of the present invention generally relate to a HAMR device having two temperature sensors. The first temperature sensor is disposed adjacent a waveguide and is about two or more micrometers away from an air bearing surface. The first temperature sensor has a length, a width and a thickness, and the length is greater than the width and the thickness. The length of the first temperature sensor is substantially perpendicular to the waveguide.

Abstract: Embodiments of the present invention generally relate to a HAMR device having two temperature sensors disposed between a near field transducer (NFT) and a return pole. The two temperature sensors are aligned in a cross-track direction.

Abstract: TAR enable write heads may use a plasmonic device (e.g., an optical transducer) which uses electromagnetic energy generated from a laser to heat the magnetic media. However, as the temperature of the plasmonic device rises, the likelihood of stressing the material of the device or other materials of the head near the plasmonic device increases. Accordingly, the write head may include a temperature sensor proximate to the plasmonic device. In one embodiment, the resistance of the temperature sensor may change according to the temperature of the plasmonic device. Based on the measured resistance of the temperature sensor, a sensing circuit may adjust the power of the laser, and thus, prevent the stressing of the materials. Moreover, the thermal coupling between the temperature sensor and a heat sink connected to the plasmonic device may be improved by moving elements associated with the sensing circuit closer to a heat sink.

Abstract: An interleaved conductor structure for electrically connecting the read/write electronics to a read/write head in a hard disk drive is provided. The interleaved conductor structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The electrical traces may have different widths, be offset, or even wrap around each other at the via connections.

Abstract: An interleaved conductor structure for electrically connecting the read/write electronics to a read/write head in a hard disk drive is provided. The interleaved conductor structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The electrical traces may have different widths, be offset, or even wrap around each other at the via connections.

Abstract: In one embodiment, a magnetic head includes a write pole; a write coil adapted for causing the write pole to emit a magnetic field upon excitation of the write coil; and a first capacitor and a second capacitor electrically connected in parallel with the write coil, each capacitor including a planar bottom plate, a top plate positioned parallel to the bottom plate, and at least one dielectric layer positioned between the top plate and the bottom plate, wherein a parasitic capacitance between the bottom plate of each capacitor and a substrate positioned below the bottom plate exists during writing operations of the magnetic head, and wherein the parasitic capacitances of the capacitors are about balanced.

Abstract: An integrated conductor/suspension structure for supporting and electrically connecting a write/read head in a hard disk drive and methods of making the conductor/suspension structure are provided. The integrated conductor/suspension structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The suspension structure includes apertures formed therein that result in a reduction in the lossy material and its effect on the electrical signals. In addition, the conductor/suspension structure of the present invention provides shielding to reduce the interference from external electric fields.

Abstract: A disk pack, comprising at least one hard disk, is rotatably mounted to a housing. The disk pack defines an axis of rotation and a radial direction relative to the axis. At least one actuator mounted to the housing is coupled with a suspension and is movable relative to the disk pack. A slider, comprising a slider body and a head configured to read data from and write data to at least one hard disk, is coupled with the suspension. A first suspension electrical interconnect is configured to electrically couple a first signal conducting pathway with the slider and with a first non-terminated signal pathway. A second suspension electrical interconnect is configured to electrically couple a second signal conducting pathway with the slider and with a second non-terminated signal pathway. The length of the second non-terminated signal pathway is selected to achieve a desired impedance level.

Abstract: An interleaved conductor structure for electrically connecting the read/write electronics to a read/write head in a hard disk drive is provided. The interleaved conductor structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The electrical traces may have different widths, be offset, or even wrap around each other at the via connections.

Abstract: Adjusting the resonance of a power distribution network in a device to ensure a resonance frequency of the device is outside of a frequency band of wireless signals, other interference signals, or interference signals intrinsic to the device. The resonance frequency may be adjusted by cutting slices into the power and/or ground planes such that a serpentine pattern (or other desired pattern) is formed. The serpentine pattern increases the length that the current travels along the power/ground plane and thus, changes the resonance frequency of the device.

Abstract: An interleaved conductor structure for electrically connecting the read/write electronics to a read/write head in a hard disk drive is provided. The interleaved conductor structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The electrical traces may have different widths, be offset, or even wrap around each other at the via connections.

Abstract: An interleaved conductor structure for electrically connecting the read/write electronics to a read/write head in a hard disk drive is provided. The interleaved conductor structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The electrical traces may have different widths, be offset, or even wrap around each other at the via connections.

Abstract: A hard disk drive (HDD) including a first resistive temperature detector (RTD) configured to detect a temperature generated by proximity of a slider and a media. The first RTD is proximate an air bearing surface (ABS) of the slider. The HDD also includes a second RTD configured to detect at least one temperature correlated to a fly-height of the slider. The second RTD is not required to be proximate the ABS of the slider. HDD also includes a read/write integrated circuit (IC) configured to determine the fly-height of the slider based on detection of temperatures by the first RTD and the second RTD.

Abstract: A hard disk drive (HDD) including a first resistive temperature detector (RTD) configured to detect a temperature generated by proximity of a slider and a media. The first RTD is proximate an air bearing surface (ABS) of the slider. The HDD also includes a second RTD configured to detect at least one temperature correlated to a fly-height of the slider. The second RTD is not required to be proximate the ABS of the slider. HDD also includes a read/write integrated circuit (IC) configured to determine the fly-height of the slider based on detection of temperatures by the first RTD and the second RTD.

Abstract: A disk pack, comprising at least one hard disk, is rotatably mounted to a housing. The disk pack defines an axis of rotation and a radial direction relative to the axis. At least one actuator mounted to the housing is coupled with a suspension and is movable relative to the disk pack. A slider, comprising a slider body and a head configured to read data from and write data to at least one hard disk, is coupled with the suspension. A first suspension electrical interconnect is configured to electrically couple a first signal conducting pathway with the slider and with a first non-terminated signal pathway. A second suspension electrical interconnect is configured to electrically couple a second signal conducting pathway with the slider and with a second non-terminated signal pathway. The length of the second non-terminated signal pathway is selected to achieve a desired impedance level.

Abstract: An integrated conductor/suspension structure for supporting and electrically connecting a write/read head in a hard disk drive and methods of making the conductor/suspension structure are provided. The integrated conductor/suspension structure may allow for an increased characteristic-impedance range, greater interference shielding and a reduction of signal loss that is contributed by a lossy conductive substrate. The suspension structure includes apertures formed therein that result in a reduction in the lossy material and its effect on the electrical signals. In addition, the conductor/suspension structure of the present invention provides shielding to reduce the interference from external electric fields.

Abstract: In a method of pre-contact detection and active damping of air bearing vibrations in a hard disk drive, a slider is isolated from ground. The slider is then capacitively coupled with a hard disk of the hard disk drive via a thermal fly-height control (TFC) heating element. An alternating current (AC) signal is applied to the slider via the TFC heating element to control the amplitude of the slider.

Abstract: A recording channel front-end circuit for driving a write element over a transmission line interconnect provides the improved performance during writing of information. In one embodiment, the recording channel front-end circuit includes a voltage-type write driver coupled to the transmission line interconnect and operable to output a write driver signal to the transmission line interconnect and a receiver termination circuit coupling the transmission line interconnect to the write element. The receiver termination circuit may include an impedance matching network operable match a terminal impedance of the write element to be substantially equal to a characteristic impedance of the transmission line interconnect.

Abstract: An accurate current source with an adjustable temperature dependence. This type of current source is used in silicon Integrated Circuit (IC) designs requiring supporting reference-voltage sources and/or reference-current sources which may be designed with or without temperature dependence. The circuit generates an accurate current with temperature independence along with another accurate current source with temperature dependence using only one precision external resistors. For the temperature-dependent current source, the temperature dependence can be controlled by setting a temperature dependence factor (TDF).