38results about "Variable capacitance carrier recording" patented technology

A recording / reproducing head for performing at least one of a record operation of recording information onto a dielectric recording medium and a reproduction operation of reproducing the information from the dielectric recording medium, the recording / reproducing head provided with: a support member which extends in a longitudinal direction of the recording / reproducing head; and a projection portion which is mounted on the support member such that a tip of the projection portion faces the dielectric recording medium, the projection portion having a ridge-line on the tip, the projection portion being capable of contacting the dielectric recording medium at one point on the ridge-line.

A dielectric recording medium in a disc form is provided with: a center hole; an inner area; a recording area; and an outer area, arranged concentrically from the inside in this order. The inner area, the recording area, and the outer area contain a uniform and flat dielectric material and are polarized with the polarization direction of the recording area opposite to that of the inner area and the outer area in their initial condition. The recording area in which data is recorded has tracks and spaces, each of which is between two of the tracks, and is provided with areas in which control information about the recording / reproducing is recorded, in the track and the space.

A phase-change recording / reproduction head includes: a probe consisting of a recording / reproduction electrode, an insulation layer arranged on the tip portion of the recording / reproduction electrode, and a resistor arranged on the insulation layer; and a return electrode arranged around the probe. During recording, voltage corresponding to the recording data is applied to the resistor so that the phase change recording medium is changed from a crystalline state to an amorphous state. During reproduction, FM-modulated frequency of an oscillator oscillating according to the capacity corresponding to the dielectric constant of the crystalline state and the amorphous state is demodulated, thereby reproducing data with a high SN ratio.

An example pickup device is provided with: an arm; a gimbal holding device disposed on one end portion of the arm; a gimbal held by the gimbal holding device with a probe set in its center portion; and a motor of rotational type for rotating the arm around a rotating shaft. The probe, which is disposed on one end of the arm, is rotated in the radial direction of a dielectric recording medium by the rotation of the motor, causing accurate and quick tracking control and track access control.

A memory cell uses a pair of cantilevers to store a bit of information. Changing the relative position of the cantilevers determines whether they are electrically conducting or not. The on and off state of this mechanical latch is switched by using, for example, electrostatic, electromagnetic or thermal forces applied sequentially on the two cantilevers to change their relative position. The amount of power required to change the state of the cell is reduced by supporting at least one of the cantilevers with at least one lateral projection that is placed in torsion during cantilever displacement. After a bit of data is written, the cantilevers are locked by mechanical forces inherent in the cantilevers and will not change state unless a sequential electrical writing signal is applied. The sequential nature of the required writing signal makes inadvertent, radiation or noise related data corruption unlikely.

A memory cell uses a pair of cantilevers to store a bit of information. Changing the relative position of the cantilevers determines whether they are electrically conducting or not. The on and off state of this mechanical latch is switched by using, for example, electrostatic, electromagnetic or thermal forces applied sequentially on the two cantilevers to change their relative position. The amount of power required to change the state of the cell is reduced by supporting at least one of the cantilevers with at least one lateral projection that is placed in torsion during cantilever displacement. After a bit of data is written, the cantilevers are locked by mechanical forces inherent in the cantilevers and will not change state unless a sequential electrical writing signal is applied. The sequential nature of the required writing signal makes inadvertent, radiation or noise related data corruption unlikely.

A dielectric recording / reproducing apparatus is provided with: a probe for applying an electric field to a dielectric material; a return electrode for returning the high frequency electric field for data reproduction; an inductor placed between the probe and the return electrode; an oscillator which oscillates at a resonance frequency determined according to the inductor and a capacitance formed in the dielectric material just under the probe; a switch for switching circuit connections depending on whether data recording is performed and data reproducing is performed; a recording signal input device for converting data to be recorded to generate a recording signal; a direct current voltage generation device for generating a direct current bias voltage to be applied to the dielectric material; a frequency-amplitude demodulator for demodulating an oscillation signal of the oscillator having the frequency that is changed depending on the capacitance owned by the dielectric material just under the probe; and a signal detector for detecting data from the demodulated signal.

A dielectric reproducing apparatus is provided with: a probe for applying an electric field to a dielectric material of a dielectric recording medium; a return electrode for returning the electric field applied from the probe; an inductor placed between the probe and the return electrode; an oscillator which oscillates at a resonance frequency determined from the inductor and a capacitance formed in the dielectric material just under the probe; an alternating current (AC) signal generation device for generating an AC signal which is applied to the probe; a frequency modulation (FM) demodulator for demodulating a FM modulation signal modulated by the capacitance corresponding to the polarization state owned by the dielectric material just under the probe; and a phase-shift keying (PSK) demodulator for reproducing data from the demodulated signal.

A data storage system that includes a positioning system for positioning the write / read mechanism and the storage medium of the data storage device with respect to each other in first and second predefined directions. The positioning system comprises a positioning apparatus comprising microfabricated first and second positioning assemblies. The positioning system further comprises a controller to position a positionable support structure of the first positioning assembly in a first predefined direction within a range of positioning that is larger, than the range of movement of a moveable support structure of the first positioning assembly by controlling (A) a stationary support structure clamp in clamping and unclamping the positionable structure to and from the support structure, (B) a moveable structure clamp in clamping and unclamping the positionable support structure to and from the moveable support structure, and (C) the movement of the moveable support structure. In one embodiment, one of the write / read mechanism and the storage medium is carried by the positionable support structure so that it is positioned with the first positioning assembly. The other one of the write / read mechanism and the storage medium is positioned with the second positioning assembly. In another embodiment, the positionable support structure carries the second positioning assembly and one of the write / read mechanism and the storage medium is positioned with the second positioning assembly while the other is held stationary. In several embodiments, the read / write mechanism is used:to mechanically write data to and electrically read data from the storage medium. In still another embodiment, the read / write mechanism is used to optically write data to and electrically read data from the storage medium. In yet another embodiment, the read / write mechanism is acoustically aided in electrically writing data to and reading data from the storage medium.

A hard disk device is to be mounted onto a playing apparatus to play data in the hard disk device, and includes a casing, a spindle, a power supply circuit and a VCM coil accommodated within the casing, a recording medium disk rotatably supported on the spindle, an arm mechanism pivotably supported within the casing, and a head slider that is attached to a distal end of an arm of the arm mechanism and configured to detect the data in the recording medium disk. The spindle is configured to be driven by a spindle motor of the playing apparatus without being contacted by the spindle motor. The VCM coil is to be positioned between VCM magnets of the playing apparatus and is configured to drive the pivoting of the arm mechanism based on a drive current supplied from the power supply circuit.

A recording / reproducing head is intended to perform at least one of a record operation of recording information onto a dielectric recording medium and a reproduction operation of reproducing the information from the dielectric recording medium. The recording / reproducing head is provided with: a support member which extends in a longitudinal direction; a projection portion which is mounted on the support member such that a tip of the projection portion faces the dielectric recording medium; and a conductive layer which covers a part other than at least the tip out of the projection portion, the projection portion containing a harder material than that of the conductive layer.

A storage layer is arranged facing an array of micro-tips. The storage layer includes a plurality of insulated conductive dots designed to store electric charges. Each micro-tip includes a high-permittivity element integral to a transistor channel connecting a source and a drain. The channel has a conductance able to be modified by the electric field created by the charge of the dot arranged facing the high-permittivity element. The system can include an actuator for relative displacement of the storage layer with respect to the micro-tips. The system can include an array of electrodes able to cause displacement of the charges from one dot to the other.

A device for detecting polarization direction of a ferroelectric is provided. From a measurement signal provided through a probe disposed in contact with or near the surface of a ferroelectric, a demodulation means generates a detection signal having a signal level corresponding to a capacitance change of the ferroelectric due to application of an alternating electric field to a capacitor component formed in the ferroelectric directly below the probe. A synchronous detection means performs synchronous detection of the detection signal based on a synchronous signal and generates a polarization direction detection signal corresponding to the polarization direction of the ferroelectric. A pseudo-noise signal generation means generates a pseudo-noise signal with the same frequency as that of the electric field signal and a different phase and amplitude therefrom. The demodulation means includes a noise component removal means that removes noise components in the measurement signal through signal arithmetic processing with the pseudo-noise signal.

A physical properties detection device comprising a probe to be placed near or touching a surface of a ferroelectric; an oscillation loop including the probe and capacitance within the ferroelectric; and detection means for detecting a physical properties of the ferroelectric on the basis of a frequency variation of a measurement signal generated in the oscillation loop, the frequency variation accompanying application of an alternating electric field to the ferroelectric; and the physical properties detection device is further comprising frequency conversion means for converting the frequency of the measurement signal to a low frequency and outputting the resulting signal as a converted measurement signal; frequency control means for controlling the frequency of the converted measurement signal so as to match a target frequency; frequency detection means for generating a frequency detection signal that has a signal level corresponding to the frequency of the converted measurement signal; and synchronous detection means for synchronously detecting the frequency detection signal on the basis of a synchronization signal.

A method and apparatus for reading data bits stored on a storage medium is provided. The apparatus comprises a data probe structure including a data probe and at least one switch attached to the data probe, a controllable voltage source configured to supply voltage to the data probe structure, and a charge amplification structure configured to receive charge from the data probe structure. The controllable voltage source applies a first voltage to the data probe structure and subsequently applies a second voltage to the data probe structure, thereby causing a sense capacitance to charge and then discharge into the charge amplification structure. Certain embodiments of the design may employ dummy cells, diodes in place of switches, and may use a single line to control voltage switching. A lock-in amplifier approach is also presented.

The invention discloses a novel memorization material produced on the basis of nanocrystalline high-dielectric coefficient (ZrO2)x(SiO2)1-x films, wherein, 0.2<=x<=0.9, and the materials can be used to prepare non-volatile memorization device and integrated circuits for information storage or other functions.The high-dielectric coefficient (ZrO2)x(SiO2)1-x films has the following characteristics that: when x is smaller, the films can remain amorphous after a high-temperature quick thermal annealing process; when x is bigger, ZrO2 nanocrystalline is partly crystallized and precipitated after the high-temperature quick thermal annealing process, simultaneously the film is a insulator with a high-dielectric coefficient and a large-forbidden band width, after substituting SiO2 by ZrO2, the size of devices is reduced and excellent insulativity is remained, therefore, a non-volatile memorization device with small size, high-density and stable performance can be prepared by using the films.The present invention provides method for preparing high-dielectric coefficient (ZrO2)x(SiO2)1-x films and the method comprises sintering ZrO2 and SiO2 with an appropriate proportion to produce ceramic target materials and preparing high-dielectric coefficient zirconium silica films by using a laser burst deposition method.

A resonance circuit (17) is composed of a capacitor Cs of a ferroelectric layer (2) of a recording medium (1), and a resonator (14). A change of the capacitor Cs of the ferroelectric layer (2) is converted into a frequency of an oscillation signal by the resonance circuit. As the resonator (14), a resonance element having a high Q, such as an SAW resonator, is used.

A device for detecting polarization direction of a ferroelectric is provided. From a measurement signal provided through a probe disposed in contact with or near the surface of a ferroelectric, a demodulation means generates a detection signal having a signal level corresponding to a capacitance change of the ferroelectric due to application of an alternating electric field to a capacitor component formed in the ferroelectric directly below the probe. A synchronous detection means performs synchronous detection of the detection signal based on a synchronous signal and generates a polarization direction detection signal corresponding to the polarization direction of the ferroelectric. A pseudo-noise signal generation means generates a pseudo-noise signal with the same frequency as that of the electric field signal and a different phase and amplitude therefrom. The demodulation means includes a noise component removal means that removes noise components in the measurement signal through signal arithmetic processing with the pseudo-noise signal.

The invention discloses a novel memorization material on the basis of nanocrystalline high-dielectric coefficient (ZrO2)x(SiO2)[1-x] films, wherein, 0.2<=x<=0.9, and the materials can be used to prepare non-volatile memorization device and integrated circuits for information storage or other functions.The high-dielectric coefficient (ZrO2)x(SiO2)[1-x] films has the following characteristics that: when x is smaller, the films can remain amorphous after a high-temperature quick thermal annealing process; when x is bigger, ZrO2 nanocrystalline is partly crystallized and precipitated after the high-temperature quick thermal annealing process, simultaneously the film is a insulator with a high-dielectric coefficient and a large-forbidden band width, after substituting SiO2 by ZrO2, the size of devices is reduced and excellent insulativity is remained, therefore, a non-volatile memorization device with small size, high-density and stable performance can be prepared by using the films. The present invention provides method for preparing high-dielectric coefficient (ZrO2)x(SiO2)1-x films and the method comprises sintering ZrO2 and SiO2 with an appropriate proportion to produce ceramic target materials and preparing high-dielectric coefficient zirconium silica films by using a laser burst deposition method.

A ferroelectric disk including disk surfaces and a ground coupling electrically coupled to an electrode sheet covered by a ferroelectric film covered by a probe surface. A slider using a resistive probe for sharing a ground with the ground coupling. A head gimbal assembly including slider interfaced through an amplifier to provide write and read signal to and from the resistive probe. A head stack assembly including at least one head gimbal assembly. A ferroelectric disk drive including the head stack assembly aligned with at least one ferroelectric disk for lateral positioning of the resistive probe near a track on the disk surface of the ferroelectric disk. Access operations for a track by providing voltages between probe sites and ground coupling, for the ferroelectric cell of each bit in track. The bit values of bits in the track, as product of access process.

A driving apparatus (100) is provided with: a base portion (110); a stage portion (130) on which a driven object (12) is mounted and which can be displaced; an elastic portion (120) which connects the base portion and the stage portion and which has elasticity to displace the stage portion in one direction; a first applying device (141, 142, 143, 22) for applying an excitation force for displacing the stage portion such that the stage portion is resonated in the one direction (Y axis) at a resonance frequency determined by the stage portion and the elastic portion; and a second applying device (161, 162, 22) for applying a driving force for displacing, in a stepwise manner or in a continuous manner, the stage portion or the driven object mounted on the stage in other direction (X axis).

A probe-based storage device comprises a storage surface for storing data represented by deformations in the surface. A probe faces the surface and includes a resonant circuit having a reactance dependent on deflection of the probe relative to the surface. A scanner is provided for scanning the probe across the surface such that the probe follows said deformations. A detector reads data stored on the surface by detecting variation of the resonant frequency of said circuit.

A probe-based storage device comprises a storage surface for storing data represented by deformations in the surface. A probe faces the surface and includes a resonant circuit having a reactance dependent on deflection of the probe relative to the surface. A scanner is provided for scanning the probe across the surface such that the probe follows said deformations. A detector reads data stored on the surface by detecting variation of the resonant frequency of said circuit.

An electrical read head having high sensitivity and resolution power and a method of operating the same are provided. The electrical read head includes a core portion for recording / reading data on / from a recording medium and an electrode pad connecting the core portion to a power supply. A surface of the core portion facing the recording medium is a plane surface and side surfaces of the core portion are perpendicular to the plane surface.

An electronic readhead having high sensitivity and resolving power and a method of operating the electronic readhead are provided. The electronic read head includes: a magnetic core portion for recording / reading data on / from a recording medium; and electrode pads for connecting the magnetic core portion to a power source. The surface of the core portion facing the recording medium is a flat surface, and the sides of the core portion are perpendicular to the flat surface.

A physical properties detection device comprising a probe to be placed near or touching a surface of a ferroelectric; an oscillation loop including the probe and capacitance within the ferroelectric; and detection means for detecting a physical properties of the ferroelectric on the basis of a frequency variation of a measurement signal generated in the oscillation loop, the frequency variation accompanying application of an alternating electric field to the ferroelectric; and the physical properties detection device is further comprising frequency conversion means for converting the frequency of the measurement signal to a low frequency and outputting the resulting signal as a converted measurement signal; frequency control means for controlling the frequency of the converted measurement signal so as to match a target frequency; frequency detection means for generating a frequency detection signal that has a signal level corresponding to the frequency of the converted measurement signal; and synchronous detection means for synchronously detecting the frequency detection signal on the basis of a synchronization signal.

A phase change recording / playback head (1) comprising: a probe (11) consisting of a recording / playback electrode (11a), an insulating layer (13) arranged on top of the recording / playback electrode (11a) ) and a resistor (14) arranged on the insulating layer (13); and a return electrode (12), which is arranged around the probe (11). At the time of recording, a voltage corresponding to recording data is applied to a resistor (14) to change the phase-change recording medium from a crystalline state to an amorphous state. At the time of reproduction, the FM modulation frequency of the oscillator oscillating according to the capacitance corresponding to the dielectric constant of the crystalline state and the amorphous state is demodulated to thereby reproduce data with a high SN ratio.

A hard disk device is to be mounted onto a playing apparatus to play data in the hard disk device, and includes a casing, a spindle, a power supply circuit and a VCM coil accommodated within the casing, a recording medium disk rotatably supported on the spindle, an arm mechanism pivotably supported within the casing, and a head slider that is attached to a distal end of an arm of the arm mechanism and configured to detect the data in the recording medium disk. The spindle is configured to be driven by a spindle motor of the playing apparatus without being contacted by the spindle motor. The VCM coil is to be positioned between VCM magnets of the playing apparatus and is configured to drive the pivoting of the arm mechanism based on a drive current supplied from the power supply circuit.

The present publication discloses a method and device for reading an electronic code. According to the method, an alternating electrical signal is brought to the code (11) being measured, with the aid of electrodes (4, 5), and the current or voltage travelling through the electrodes (4, 5) is measured. According to the invention, the real (8) and the imaginary (9) components of the current or correspondingly the voltage are defined, and the electrodes (4, 5) being on an essentially lossless surface, an angle correction is made to the real (8) and imaginary (9) components of the current or the voltage, in such a way that substantial changes in the current take place only in the imaginary component (9) of the current or voltage.