33 results about "Microactuator" patented technology

To provide a tuning device that can increase the applicability of frequencies that can be communicated by a communication device.SOLUTION: A tuning device is provided that uses a micro-actuator to tune the characteristics of an IC chip. The tuning device includes a dielectric member and driving unit, as the micro-actuator. The dielectric member is made of a dielectric, and the driving unit is configured to change the distance between the dielectric member and the IC chip.SELECTED DRAWING: Figure 1

A segmented alphanumeric includes a display panel, at least one linearly actuated platform, and display elements. Each display element passes through an orifice in the display panel to generate protruded and segmented alphanumeric characters in combination with other extended display elements. A microactuator array is displaceable by the linearly actuated platform and includes electromagnets and rotors. Each rotor is mounted for rotation in at least one direction between an active state and an inactive state by at least one associated electromagnet. Each display element is displaced through the orifice by actuation of the linearly actuated platform via a respective rotor when the respective rotor is rotated into its active state and to evade displacement by the rotor when the rotor is rotated into its inactive state.

According to one embodiment, a magnetic disk drive includes rotatable disks, heads, microactuators, a voice coil motor (VCM), and a control system, wherein the control system determines a final set of heads of target for simultaneously positioned on their respective target tracks from among the heads, by using at least a displacement amount of the microactuators, determines a target position of the VCM when the heads in the final set are simultaneously positioned on their respective target tracks, switches a controller of the VCM when the heads in the final set are simultaneously positioned on their respective target tracks, and switches controller of the microactuators included in each of the heads in the final set.

The present application discloses a method and device for constructing a liquid-cooled radiator microchannel with integrated bypass control, which is used to solve the energy waste problem caused by fixed high-resistance microchannels. The method of the present application includes: establishing a three-dimensional geometric model of the liquid-cooled radiator, the three-dimensional geometric model including a main channel for processing peak heat load conditions, a bypass channel for processing low heat load conditions, and an SMA microactuator arranged in the bypass channel; defining the fluid domain, solid domain, and actuator domain respectively, and configuring an SMA constitutive model for the actuator domain to describe the relationship between temperature, stress, and phase change; establishing a bidirectional coupling relationship between the fluid domain, solid domain, and actuator domain based on the SMA constitutive model to form a digital twin model; applying a simulated heat load that changes with time to the digital twin model to obtain the simulation performance parameters of the liquid-cooled radiator under dynamic conditions; iteratively optimizing the target design parameters based on the simulation performance parameters to obtain the target design parameters.

The present invention relates to droplet-based surface modification and washing. According to one embodiment, a method of splitting a droplet is provided, the method including providing a droplet microactuator including a droplet including one or more beads and immobilizing at least one of the one or more beads. The method further includes conducting one or more droplet operations to divide the droplet to yield a set of droplets including a droplet including the one or more immobilized beads and a droplet substantially lacking the one or more immobilized beads.

To provide a disk device capable of suppressing fluctuations in a gap between a recording medium and a head and improving reliability.SOLUTION: According to an embodiment, a disk device includes: a disk-shaped recording medium; a magnetic head having a heater that adjusts a gap between a write head, a read head, and the recording medium; a suspension assembly that supports the magnetic head; a microactuator including a piezoelectric element provided in the suspension assembly; and a controller that sets a driving voltage of the piezoelectric element according to the difference between the piezoelectric element and a touchdown output at driving, and the piezoelectric element and a touchdown output at non-driving.SELECTED DRAWING: Figure 6

We provide microactuator assemblies and suspensions for disk drives. [Solution] The microactuator assembly comprises at least one piezoelectric element, a first electrode located on a first side surface of the at least one piezoelectric element, having a first height extending along the entire length of the first side surface of the at least one piezoelectric element, and a second electrode located on a second side surface of the at least one piezoelectric element, having a second height smaller than the first height of the first electrode, extending shorter than the entire length of the second side surface of the at least one piezoelectric element, and configured to bend when a voltage is applied to resist the constraint exerted by the bonding adhesive.

Example control circuitry, data storage devices, and methods for parallel self-servo write in a data storage device are described. The data storage device may include multiple heads actuated over different surfaces of a data storage device and receive read signals from two different heads over two different surfaces in parallel. Position error signals may be determined from each read signal and corresponding position compensation values may be determined for their respective microactuators. Application of these compensation values may maintain their relative positions for parallel writing of servo tracks based on their respective spiral reference patterns and TPI settings.

Embodiments provide a magnetic disk drive and control method capable of preventing degradation of microactuator components. When adjusting the position of a magnetic head using a microactuator, the magnetic disk drive control unit applies a third voltage value based on the second voltage value to the microactuator when the absolute value of the first voltage value applied to the microactuator is corrected based on hysteresis and the absolute value of the second voltage value applied to the microactuator is positive. Furthermore, the control unit operates at least one of the voice coil motor and / or the microactuator other than the microactuator applying the third voltage value to adjust for any shortfall in adjustment by the microactuator.

The present disclosure describes example circuits, data storage devices, and methods for parallel self-servo writes in a data storage device. The data storage device may include a plurality of heads that actuate over different surfaces of the data storage device and receive read signals in parallel from two different heads over two different surfaces. A position error signal may be determined from each read signal, and a corresponding position compensation value may be determined for a respective microactuator of the position error signal. Applications of these compensation values may maintain their relative position based on their respective helical reference patterns and TPI settings for parallel writing of servo tracks.

The invention provides a microactuator assembly and a suspension for a disk drive. A PZT microactuator (e.g., for a hard disk drive) has a restraint layer bonded on its side opposite to the side on which the PZT is mounted. The restraint layer includes a stiff and resilient material, such as stainless steel. The restraint layer may cover most or all of the top of the PZT, electrically connected to the PZT where it is not covered by the restraint layer. The constraining layer reduces bending of the PZT at the time of installation, thereby increasing the effective stroke length, or reverses the sign of the bending, thereby further increasing the effective stroke length of the PZT. The constraining layer may be one or more active PZT material layers having an opposite direction of action to the primary PZT layer. The restraint layer may be thinner than the primary PZT layer.

The embodiment of the invention relates to a magnetic disk device of a multi-stage micro-actuator system. A magnetic disk device according to an embodiment includes: a plurality of headers capable of reading and writing data independently at the same time; microactuators, each of which is provided with one or more of the microactuators in each of the heads, and each of the microactuators can be independently controlled; a VCM that controls each of the heads; a simultaneous in-orbit head determination unit that determines a final set, which is a set of heads that are simultaneously in orbit, by using at least the amount of displacement of the microactuators; a VCM target position determination unit that determines the target position of the VCM when the VCM is in orbit at the same time; the VCM control switching part is used for switching the VCM controller when the VCM controller is in orbit at the same time; and an MA control switching unit that switches the controller of the microactuator with respect to each of the simultaneous on-orbit heads determined by the simultaneous on-orbit head determination unit.

The invention discloses a method and a device for constructing a liquid cooling radiator micro-channel with integrated bypass control, which are used for solving the problem of energy waste caused by a fixed high-flow-resistance micro-channel. The method comprises the following steps: establishing a three-dimensional geometric model of the liquid cooling radiator, wherein the three-dimensional geometric model comprises a main channel for processing a peak thermal load working condition, a bypass channel for processing a low thermal load working condition and an SMA micro-actuator arranged in the bypass channel; a fluid domain, a solid domain and an actuator domain are defined respectively, and an SMA constitutive model used for describing the temperature, stress and phase change relation is configured for the actuator domain; establishing a bidirectional coupling relationship among a fluid domain, a solid domain and an actuator domain according to the SMA constitutive model to form a digital twinborn model; a simulated thermal load changing along with time is applied to the digital twin model, and simulation performance parameters of the liquid cooling radiator under the dynamic working condition are obtained; and performing iterative optimization on the target design parameters according to the simulation performance parameters to obtain the target design parameters.

PZT microactuators, such as those used in hard disk drives, have a constraining layer bonded to the side opposite the PZT mounting surface. The constraining layer is made of a stiff, resilient material, such as stainless steel. The constraining layer covers most or all of the top surface of the PZT and provides electrical connections to the PZT not covered by the constraining layer. The constraining layer increases the effective stroke length by reducing the bending of the attached PZT, or further increases the effective stroke length by reversing the sign of bending. The constraining layer may be one or more active layers of PZT material that act in the opposite direction to the main PZT layer. The constraining layer may be thinner than the main PZT layer.

A multiplanar electromagnetic array is disclosed herein, where the array includes a first electromagnetic coil in a first plane, a second electromagnetic coil in a second plane, and a third electromagnetic coil in a third plane. A microactuator is configured to energize electromagnetic coils in the array in sequence, thereby forming a moving electromagnetic field that moves a permanent magnet positioned above the multiplanar electromagnetic array. Movement of the permanent magnet effectuates desired movement of a bead that is in a channel of an immunoassay device.

There is disclosed a leaky-wave antenna device comprising a first metasurface comprising a first dielectric substrate having a first array of conductive elements and a second metasurface comprising a second dielectric substrate having a second array of conductive elements. The antenna device further comprises a conductive ground plane, a micro-actuator, and a feed comprising a pair of switchable dipoles. The first and second metasurfaces and the conductive ground plane are in a stacked arrangement and substantially parallel to one another, with the first metasurface located between the second metasurface and the conductive ground plane. A spacing between the conductive ground plane and the first metasurface is adjustable by operation of the micro-actuator. The feed is disposed between the first and second metasurfaces at a location corresponding to a centre of the first and second arrays. The leaky-wave antenna device may be operated to steer a beam over a wide range by selective energising of the pair of dipoles and by adjusting the spacing between the conductive ground plane and the first metasurface.

The present invention relates to droplet-based surface modification and washing. According to one embodiment, a method of splitting a droplet is provided, the method including providing a droplet microactuator including a droplet including one or more beads and immobilizing at least one of the one or more beads. The method further includes conducting one or more droplet operations to divide the droplet to yield a set of droplets including a droplet including the one or more immobilized beads and a droplet substantially lacking the one or more immobilized beads.

The present disclosure proposes a multi-layer PZT microactuator with an active PZT restraint layer for a DSA suspension. A PZT microactuator (e.g., for a hard disk drive) has a restraint layer bonded on its side opposite to the side on which the PZT is mounted. The restraint layer includes a stiff and resilient material, such as stainless steel. The restraint layer may cover most or all of the top of the PZT, electrically connected to the PZT where it is not covered by the restraint layer. The constraining layer reduces bending of the PZT at the time of installation, thereby increasing the effective stroke length, or reverses the sign of the bending, thereby further increasing the effective stroke length of the PZT. The constraining layer may be one or more active PZT material layers having an opposite direction of action to the primary PZT layer. The restraint layer may be thinner than the primary PZT layer.

According to one embodiment, a flexure for use in a suspension assembly includes: a supporting plate; a wiring member including a metal plate and a wiring substrate placed on the metal plate and has a tip-side portion placed on the supporting plate, a base end-side portion extending to an outside of the supporting plate, and a first end provided at an extension end of the base end-side portion; and a piezoelectric element mounted on the wiring member. The wiring substrate includes an insulating layer and a conductive layer stacked on the insulating layer, the conductive layer having a plurality of connecting pads including a ground pad to which a ground electrode of the piezoelectric element is connected, a plurality of connecting terminals provided at the first end and including a ground terminal, and a plurality of traces including a ground trace connecting the ground pad and the ground terminal.

The invention discloses a worm-imitating structure digestive tract examination and minimally invasive treatment device which comprises a head unit and a body module connected with the head unit, the body module is formed by connecting a plurality of body section units end to end, and a miniature camera, an LED lighting source and a miniature ultrasonic probe are integrated at the front end of the head unit. Each body section unit comprises an elastic material main body with a hollow middle part and a micro actuator arranged in the elastic material main body, and the tail part of the body module is provided with a spraying device, a treatment instrument channel and a micro treatment device extending out of the treatment instrument channel; and a charging power supply for internal power supply and a wireless communication module are mounted in the head unit or the body module. The system can solve many problems of existing digestive tract examination and minimally invasive treatment technologies in the aspects of patient experience, operation accuracy, function integration, intellectualization and the like.

The invention provides an electroplating method for the performance of a self-crimping passive element. The preparation method comprises the following operation steps: depositing a sacrificial layer on a substrate, and performing first photoetching to determine an operation table; depositing a dual-frequency silicon nitride strain layer; depositing a metal step layer; depositing an electrostatic micro-actuator; depositing an oxidation protection layer by using an atomic layer deposition method; depositing a metal conductive layer; depositing an actuator electrode; the sacrificial layer is etched through dry etching, and the self-crimping inductor is obtained by triggering crimping by using the film stress of the dual-frequency silicon nitride strain layer; and activating the electrostatic micro-actuator, and performing gold plating or copper plating treatment on the self-crimping inductor to obtain the self-crimping inductor with a high quality factor. According to the self-crimping inductor electroplating technology, the electroplating efficiency and the quality factor of the self-crimping inductor are improved, and the quality factor Q value is improved by 20-30 times compared with a non-metallized device and is improved by 2-5 times compared with a conventional static electroplating scheme.

An actuator includes a drive mechanism, a shift mechanism, a screw rod mechanism and a base. The drive mechanism includes a first output shaft and a second output shaft. The shift mechanism includes a gear bracket and a first transmission gear. The first transmission gear has a rotation center extending in a first direction. The screw rod mechanism includes a number of screw assemblies, and each screw assembly includes a push rod. The second output shaft is configured to be able to drive the gear bracket to move along a second direction, so that the first transmission gear is able to mate with different screw rod assemblies. The first output shaft is configured to be able to drive the first transmission gear to rotate around its own rotation center, and then drive the screw assembly to move, so as to move the push rod.

An apparatus comprising: a thermally-actuated microactuator configured to deflect a component in dependence on an applied stimulus; and an extender having a length configured to increase deflection of the component by the microactuator, wherein the extender comprises one or more voids.

This invention belongs to the field of metal additive manufacturing heat treatment technology, and discloses a heat treatment method, product, and application for improving the performance of additively manufactured Fe-Ga alloys. The method includes: solution treatment, holding the laser-additively manufactured Fe-Ga alloy at 700–850℃ for 0.5–3 hours under argon protection; brine cooling, directly immersing the solution-treated Fe-Ga alloy in room-temperature brine to cool to room temperature; aging treatment, holding the brine-cooled Fe-Ga alloy at 280–320℃ for 1–12 hours; and water cooling treatment, water cooling the aged Fe-Ga alloy to room temperature. <100> The area of ​​BD texture should account for no less than 75%; this method retains strong texture. <100> Simultaneously with texturing, precipitation was suppressed by brine cooling, and combined with aging treatment to obtain a size of 5–10 nm and a number density ≥3.0 × 10⁻⁶. 10 mm ‑2 The L60 precipitate phase reduces the alloy's saturation magnetostriction coefficient λ. s The concentration reaches 290 ppm or higher. This application also provides Fe-Ga alloy products obtained by this method and their applications in magnetostrictive sensors or microactuators.

A hard disk drive (HDD) suspension assembly includes a microactuator mechanically configured to directly move a flexure tongue to move a slider mounted thereto. The microactuator includes single-layer piezoelectric elements recessed in metal-layer pockets in the flexure tongue, with each piezoelectric element having continuous top and bottom electrodes spanning the length. A non-conductive adhesive attaching the piezoelectric element is positioned to insulate the top and bottom electrodes and to fill a gap between the piezoelectric element and the metal layer for piezoelectric-to-flexure tongue load transfer effectiveness. The piezoelectric element is electrically connected via an electrically-conductive adhesive that may be configured to bridge a gap separating the mounting pocket and a separate opening to the conductive layer. The piezoelectric driving signal can be simplified absent direct current bias for depolarization concerns.

According to one embodiment, a magnetic disk drive includes rotatable disks, heads, microactuators, a voice coil motor (VCM), and a control system, wherein the control system determines a final set of heads of target for simultaneously positioned on their respective target tracks from among the heads, by using at least a displacement amount of the microactuators, determines a target position of the VCM when the heads in the final set are simultaneously positioned on their respective target tracks, switches a controller of the VCM when the heads in the final set are simultaneously positioned on their respective target tracks, and switches controller of the microactuators included in each of the heads in the final set.

The disclosure relates, in various embodiments, to devices, articles, and methods for jetting an active pharmaceutical ingredient into a patient using an electrically-triggered microactuator powered by a reactive material such as an aluminium-nickel nanofilm.

This application provides a self-supporting piezoelectric nanofilm microactuator and its fabrication method. The fabrication method includes: forming an insulating layer on the front side of a substrate; forming a bottom electrode; forming a piezoelectric thin film with a submicron thickness; thinning the back side of the substrate; forming a top electrode with a nanometer thickness on the piezoelectric thin film; sequentially patterning the piezoelectric thin film, bottom electrode, and insulating layer to define the device shape; coating a continuous polymer protective layer on the front side of the device; forming a mask on the back side of the device to define a release window; temporarily bonding the front side of the device wafer to a carrier wafer; etching the back side according to the release window, using the insulating layer as the etching termination layer to form a deep cavity on the back side and release the support under the cantilever beam; debonding and cleaning the front side; removing the sacrificial layer, releasing the device, and obtaining the self-supporting piezoelectric nanofilm microactuator. This application can achieve low-voltage compatibility between the device and on-chip electronics and achieve high-yield manufacturing of submicron piezoelectric thin film microactuators.

The application discloses a preparation and processing method of an optical tunable organ chip, and the method comprises the following steps: preparing soft channel A and B templates; pouring a processed polymer composite material into the prepared soft channel A template to obtain an initial organ chip channel to be processed; performing scanning and processing on the upper surface of the initial organ chip channel from bottom to top by using a femtosecond laser two-photon polymerization method to obtain a three-dimensional micro actuator; and performing post-processing on the initial organ chip with the three-dimensional micro actuator; and bonding the soft channel A and the soft channel B of the initial organ chip with the three-dimensional micro actuator to obtain the optical tunable organ chip.

The present invention provides a magnetic disk drive that improves reliability, and a method for switching the bias voltage and drive voltage of a microactuator. The magnetic disk drive of this embodiment includes: a disk; a head that writes data to and reads data from the disk; an actuator that rotationally drives and controls the movement of the head mounted on the disk; a microactuator mounted on the actuator that minutely oscillates the head in the radial direction of the disk using a piezoelectric element. The piezoelectric element expands and contracts when a drive voltage based on a bias voltage is applied to the piezoelectric element; and a controller that switches the bias voltage according to the state of access processing.