245results about "Magnetostrictive device manufacture/assembly" patented technology

An ultrasound transducer includes an array of PZT elements mounted on a non-recessed distal surface of a backing block. Between each element and the backing block is a conductive region formed as a portion of a metallic layer sputtered onto the distal surface. Traces on a longitudinally extending circuit board—preferably, a substantially rigid printed circuit board, which may be embedded within the block—connect the conductive region, and thus the PZT element, with any conventional external ultrasound imaging system. A substantially “T” or “inverted-L” shaped electrode is thereby formed for each element, with no need for soldering. At least one longitudinally extending metallic member mounted on a respective lateral surface of the backing block forms a heat sink and a common electrical ground. A thermally and electrically conductive layer, such as of foil, transfers heat from at least one matching layer mounted on the elements to the metallic member.

Bender devices are demonstrated by developing non-uniform fields within a homogeneous, non-planar single slab active member material of non-uniform thickness through geometrical constraints and electrode placement. Single slab actuators are demonstrated for semiconductor designs including MEMS applications. Single slab bender periodic designs are demonstrated to be well suited for MEMS fabrication. Shaped actuators having a topological pattern formed across at least one portion are demonstrated to induced strain at the patterned portion of the actuator, causing the patterned portion to flare into open and close positions upon application of an external field. Voltage transformers, spark generators, power sources, and sensors are developed using the non-planar, homogeneous, single slab active member material of non-uniform thickness. Last, semiconductor process design techniques are demonstrated for periodic and other non-planar single slab actuators.

A flexible detection/test tape includes a first flexible conductive layer, and a second flexible conductive layer positioned opposite the first conductive layer. A plurality of at least one of sensors, actuators or transducers are positioned between and are bonded to the first flexible conductive layer and the second flexible conductive layer. An insulative material is inserted around the plurality of at least one of the sensors, actuators or transducers. An electrical contact network connects to the first flexible conductive layer and the second flexible conductive layer, whereby power and control signals are provided to the flexible detection/test tape.

A positive magnetostrictive material such as a ferromagnetic alloy is subjected to a magnetic field during annealing treatment while being heated for a predetermined period of time at an elevated temperature below its softening temperature followed by cooling resulting in a treated ferromagnetic material having high tensile strength and positive magnetostriction properties for enhancing use thereof under tensile loading conditions. Such treatment of the ferromagnetic alloy may be augmented by application thereto of a compressive stress.

The magnetoelectricity composite material is a rectangle piece (1) divided into two areas A1 and A2 along longitudinal direction. A1 is made from magnetostrictive material, and A2 is made from piezodielectric material. A1 and A2 are combined through agglomerant. A pair of flat pole (4a and 4b) is in the A2 area. The piezodielectric material is polarized along thick direction. The said magnetostrictive material is magnetostrictive alloy, oxide or their composite material with polymer. The said piezodielectric material is piezoelectric ceramic or a composite material formed from piezoelectric ceramic and polymer. When dc magnetic biasing field and AC magnetic field with small signal are applied to rectangle piece 2 of magnetostrictive material along longitudinal direction, the rectangle piece (1) of magnetoelectricity generates resonance near to 60kHz, and voltage is output through rectangle piece 3 of piezodielectric composite material so as to realize magneto-electric coupling.

[Object] A bulk material which is suitably used as a material for actuator and sensor elements is formed from a Fe—Ga base magnetoresistive alloy and a Ti—Ni base shape memory alloy taking advantage of crystal miniaturization and anisotropy as well as reduction of precipitates (equilibrium state in state diagram) and non-equilibrium phases peculiar to liquid rapidly solidified materials, and the performance of the material is enhanced by a production method thereof which has cost advantage over a melt method.

[Construction] A rapidly solidified material having a particular rapidly solidified texture of a Fe—Ga magnetostrictive alloy or a TiNi-based shape-memory alloy and properties derived therefrom is formed into slices which are laminated to each other in a die, or is formed into a powder or chops which are filled in the die. Subsequently, spark plasma sintering is performed so that bonds between the slices, grains of the powder, or the chops are formed at a high density to form a bulk alloy, followed by annealing whenever necessary, so that the properties of the alloy are improved.

A variable inductor type MEMS pressure sensor using a magnetostrictive effect comprises an inductor array unit and a capacitor unit. The inductor array unit includes a coil unit having a plurality of serially connected circular electrodes formed on a first substrate and a magnetostrictive material thin film corresponding one by one to the circular electrode formed on a second substrate opposite to the first substrate at a predetermined distance in parallel to form an inductor which has the magnetostrictive material thin film as a core of the coil unit for inducing change of magnetic permeability of the magnetostrictive thin film depending on external pressure to vary inductance of the inductor. The capacitor unit constitutes a LC resonant circuit with the inductor array unit to convert magnetic energy discharged in the inductor array unit into a voltage. The variable inductor type MEMS pressure sensor has an excellent resolution because it is more sensitive than a conventional piezoresistive or capacitance sensor, and is manufactured using a MEMS process technology exchangeable with a semiconductor process, thereby enabling miniaturization and a mass package process to reduce the cost of production.

A multilayer ceramic structure, which is to be divided into a large number of piezoelectric actuators, includes a rectangular-parallelepiped-shaped multilayer ceramic body. An upper surface opposing electrode is formed on an upper surface, a lower surface opposing electrode is formed on a lower surface and inner opposing electrodes are formed inside the multilayer ceramic body. A silt is provided in the upper surface opposing electrode. Opposing portions are provided where the upper surface opposing electrode, the inner opposing electrodes and the lower surface opposing electrode are superposed with each other when viewed in plan. The slit is provided in the upper surface opposing electrode in a portion of a region between the opposing portion and the first side surface and so as to extend in a first direction linking a first end surface and a second end surface.

A magnetostrictive device for a torque sensor which has a high sensor sensitivity whether the excitation frequency is in a high frequency range or in a low frequency range and can withstand excess load torques well, and also a method of easily manufacturing the device. In manufacturing the magnetostrictive device 1 for a torque sensor, which has a magnetic anisotropic portion 15 formed on the surface of a shaft body 10 thereof, the method of forming the magnetic anisotropic portion 15 comprises the steps of: forming spiral grooves in the surface of the shaft body 10 to form a plurality of troughs 16 and ridges 17 alternately; and directly applying a compressive stress only to the ridges 17 to cause deformations accompanied by plastic flow and to provide an almost planar plateau portion 171 at a crest portion of each of the ridges 17.

A quartz crystal resonator includes a quartz crystal resonator element, a thermistor, and a package base having a first principal surface and a second principal surface having an opposed surface relationship with each other, the quartz crystal resonator element is mounted on the first principal surface side, the thermistor is housed in a recessed section of the second principal surface side of the package base, a plurality of electrode terminals connected to the quartz crystal resonator element or the thermistor is disposed on the second principal surface side of the package base, and a distance in a first direction perpendicular to the first principal surface from a mounting surface of the electrode terminals to the thermistor is equal to or longer than 0.05 mm.

The invention relates to a high-performance polycrystalline texture Fe-Ga-based magnetostrictive thin material and a preparation method thereof; the component of the material is Fe100-x-y-zGaxMyNz; M stands for one or more among B, Nb, Cr, VC, TiC, MnS and AlN; N stands for one or more among S, Sb and Sn; wherein, x is equal to 15-25; y is equal to 0.5-3.0; z is equal to 0.01-0.05; and the residual is iron. The method has the following process key points: based on the requirements of the material composition, melting master alloy; casting alloy ingot; hot-forging and cogging; rolling the material into the appropriate thickness; and a variety of follow-up heat treatment. The Fe-Ga-based magnetostrictive thin material has obvious (100)<001>cubic texture or (110) <001> goss texture; and the maximum magnetostriction coefficient (3/2)lambdas is up to 280 multiplying 10<-6>.

An ultrasound transducer that achieves broadband characteristics without degrading the sensitivity of the ultrasound transducer. Piezoelectric element (202) includes piezoelectric thin film (203), first electrode (204) that is disposed on a first surface of piezoelectric thin film (203) in a thickness direction of piezoelectric thin film (203), and second electrode (205) that is disposed on a second surface of piezoelectric thin film (203) in the thickness direction of piezoelectric thin film (203), and at least two of parameters of a spring constant, a viscosity coefficient, and a mass in an equivalent single damped oscillation model representing a structure of a diaphragm composed of each piezoelectric cell (200) are each set to a value that is different among the piezoelectric cells (200) such that a relationship between a driving frequency ratio and a phase in the diaphragm is substantially identical among the piezoelectric cells (200).

A preparation method for maskless based on membrane or multi-membrane namometer magneto-electronic device is belongs to magneto-electronic device fabrication technique field. It is characterized in following procedures: first, depositing magnetism device matrix in order of underlay, cushion breaker, magnetic layer and covering layer; when deposit magnetic layer, 50-5000e plane abducting magnetic field should be added or magnetic field heat processing should be carried out after the deposition if needed; second, using focus gallium ion workstation as processing equipment to make maskless ion irradiation processing; third, the ion irradiation parameter is: dosage of ion irradiation is 1 is multipled by 10<>13<> swung dash 1 is multipled by 10<>18<>ions/cm<>2<>, ion beam energy is 20 to 30keV, ion beam stream is 100pA to 5nA; fourth, using focus gallium ion workstation to deposit needed electrode around magnetic membrane device. The method is characterized in dispense with preparation mask, easy to carry out and high efficiency.

A method for manufacturing a sintered compact includes the steps of preparing an alloy powder having a composition represented by Expression 1: RTW (where, R is at least one kind of rare earth metal, T is at least one kind of transition metal, and w defines a relation of 1<w<4), sintering the alloy powder in a vacuum atmosphere or an atmosphere containing gas with a molecular weight of 30 or less, and processing the alloy powder by a hot isostatic pressing. The sintered compact has a high density, and reduces deteriorations in its sintered compact properties such as magnetostrictive properties in an air atmosphere at high-temperatures.

The invention provides a cantilever magnetic sensor. The sensor comprises a base and a cantilever beam, wherein one end of the cantilever beam is fixed on the base, and the other end of the cantileverbeam is a free end; a magnet is arranged on the cantilever beam; and the cantilever beam vibrates under the act of a vibrating source in the working state, the frequency and amplitude of vibration are changed due to the magnetic torque generated by the magnet when an external magnetic field acts on the magnet, and the magnetic field can be detected by detecting the frequency and amplitude of thevibration. The magnetic sensor is simple in structure, and can realize high-sensitivity magnetic field detection.

The present invention relates to a preparation method of a complex phase multiferroic material. The method of the present invention comprises the steps of applying an electric field on a substrate toenable a ferroelectric substrate to generate the stress pre-deformation, or applying the tensile stress or pressure stress on the ferroelectric substrate via a mechanical device to generate the pre-deformation; growing a ferromagnetic film on a pre-deformed ferroelectric film substrate via the methods, such as the pulsed laser deposition, the magnetron sputtering, the molecular beam epitaxy, etc.;after the ferromagnetic film is prepared, removing the electric field or the mechanical device on the ferroelectric substrate, and obtaining the complex phase multiferroic material. The ferroelectricsubstrate cannot recover to an original shape under the constraint of the ferromagnetic film, so that the stress is generated at an interface, and the magnetism of the ferromagnetic film is regulatedand controlled by the stress. With the existence of the pre-stress in the complex phase multiferroic material obtained by the present invention, a smaller external electric field can change the magnetization state of the ferromagnetic film, thereby reducing a response field.

The invention provides a potassium niobate sodium-based multi-layer piezoelectric ceramic element. A chemometry general form of a formula of potassium niobate sodium-based leadless piezoelectric ceramics is that [(Na0.52K0.44)1-xLix] (Nb0.93-ySb0.07Tay)O3, wherein 0.02<=x<=0.06, 0.02<=y<=0.06, a piezoelectric constant ranges from 300 pC/N to 350 pC/N and even higher, a dielectric constant ranges from 1700 to 2000, and an electromechanical coupling coefficient ranges from 0.40 to 0.45.