107 results about "Micro coil" patented technology

The apparatus for deployment of a therapeutic device such as a micro-coil detachably mounts the therapeutic device to a distal portion of a pusher member. In one embodiment, the therapeutic device is detachably mounted to the distal portion of the pusher member by a tubular collar that can be heated by a heater such as an electrical resistance coil to expand the collar and release and deploy the therapeutic device. The apparatus for deployment of a therapeutic device such as a micro-coil may also provide for a pusher member and a connector fiber for securing the therapeutic device to the pusher member. The connector fiber passes through a heater within the distal portion of the pusher member, for heating and breaking the connector fiber to release the therapeutic device when a desired placement of the therapeutic device within the vasculature is achieved.

A method of forming, in or on a Si substrate, planar micro-coils with coil windings of high aspect ratio (>3) and a wide variety of geometric shapes. The micro-coils may be formed on a Si substrate and be embedded in a dielectric, or they may be formed in trenches within a Si substrate. The micro-coils may have field enhancing ferromagnetic pillars rising above the micro-coil plane, formed at positions of maximum magnetic field strength and the micro-coils may also include magnetic layers formed beneath the substrate and contacting the pillars to form a substantially closed pathway for the magnetic flux. The substrate may be thinned to membrane proportions. These micro-coils produce strong magnetic fields with strong field gradients and can be used in a wide variety of processes that involve the exertion of strong magnetic forces at small distances or the creation of magnetic wells for trapping and manipulating small particles.

A microvalve which utilizes a low temperature (<300° C.) fabrication process on a single substrate. The valve uses buckling and an electromagnetic actuator to provide a relatively large closing force and lower power consumption. A buckling technique of the membrane is used to provide two stable positions for the membrane, and to reduce the power consumption and the overall size of the microvalve. The use of a permanent magnet is an alternative to the buckled membrane, or it can be used in combination with the buckled membrane, or two sets of micro-coils can be used in order to open and close the valve, providing the capability for the valve to operate under normally opened or normally closed conditions. Magnetic analysis using ANSYS 5.7 shows that the addition of Orthonol between the coils increases the electromagnetic force by more than 1.5 times. At a flow rate of 1 mL / m, the pressure drop is <100 Pa. The maximum pressure tested was 57 kPa and the time to open or close the valve in air is under 100 ms. This results in an estimated power consumption of 0.1 mW.

This invention relates generally to detection devices having one or more small wells each surrounded by, or in close proximity to, an NMR micro coil, each well containing a liquid sample with magnetic nanoparticles that self-assemble or disperse in the presence of a target analyte, thereby altering the measured NMR properties of the liquid sample. The device may be used, for example, as a portable unit for point of care diagnosis and / or field use, or the device may be implanted for continuous or intermittent monitoring of one or more biological species of interest in a patient.

This invention relates generally to detection devices having one or more small wells each surrounded by, or in close proximity to, an NMR micro coil, each well containing a liquid sample with magnetic nanoparticles that self-assemble or disperse in the presence of a target analyte, thereby altering the measured NMR properties of the liquid sample. The device may be used, for example, as a portable unit for point of care diagnosis and / or field use, or the device may be implanted for continuous or intermittent monitoring of one or more biological species of interest in a patient.

The apparatus for deployment of a therapeutic device such as a micro-coil detachably mounts the therapeutic device to a distal portion of a pusher member. In one embodiment, the therapeutic device is detachably mounted to the distal portion of the pusher member by a tubular collar that can be heated by a heater such as an electrical resistance coil to expand the collar and release and deploy the therapeutic device. The apparatus for deployment of a therapeutic device such as a micro-coil may also provide for a pusher member and a connector fiber for securing the therapeutic device to the pusher member. The connector fiber passes through a heater within the distal portion of the pusher member, for heating and breaking the connector fiber to release the therapeutic device when a desired placement of the therapeutic device within the vasculature is achieved.

A microvalve which utilizes a low temperature (<300° C.) fabrication process on a single substrate. The valve uses buckling and an electromagnetic actuator to provide a relatively large closing force and lower power consumption. A buckling technique of the membrane is used to provide two stable positions for the membrane, and to reduce the power consumption and the overall size of the microvalve. The use of a permanent magnet is an alternative to the buckled membrane, or it can be used in combination with the buckled membrane, or two sets of micro-coils can be used in order to open and close the valve, providing the capability for the valve to operate under normally opened or normally closed conditions. Magnetic analysis using ANSYS 5.7 shows that the addition of Orthonol between the coils increases the electromagnetic force by more than 1.5 times. At a flow rate of 1 mL / m, the pressure drop is <100 Pa. The maximum pressure tested was 57 kPa and the time to open or close the valve in air is under 100 ms. This results in an estimated power consumption of 0.1 mW.

The apparatus for deployment of a therapeutic device such as a micro-coil detachably mounts the therapeutic device to a distal portion of a pusher member. In one embodiment, the therapeutic device is detachably mounted to the distal portion of the pusher member by a tubular collar that can be heated by a heater such as an electrical resistance coil to expand the collar and release and deploy the therapeutic device. The apparatus for deployment of a therapeutic device such as a micro-coil may also provide for a pusher member and a connector fiber for securing the therapeutic device to the pusher member. The connector fiber passes through a heater within the distal portion of the pusher member, for heating and breaking the connector fiber to release the therapeutic device when a desired placement of the therapeutic device within the vasculature is achieved.

The invention discloses a mini-type electromagnetism low frequency energy collector in the field of electronic component which comprises a libration pick up structure, a support structure and a micro-coil structure. The libration pick up structure comprises a metal plane spring and a permanent magnet. The metal plane spring comprises four square spirality elastic arms and a metal platform. The permanent magnet is arranged at the metal platform. The micro-coil comprises a micro-coil winding and an insulated underlay. The metal plane spring and the support structure are integrated as a whole. The libration pick up structure and the support structure are at the micro-coil. The libration pick up structure of the utility model has a natural frequency near to 100 HZ and is easy to satisfy the integrated requirements such as improvement of the low frequency energy collecting efficiency, low production cost and integrated production.

A plane nuclear magnetic resonance micro coil micro detector is disclosed that consists of plane nuclear magnetic resonance micro coil [1] and micro flow channel structure [2]. It adopts the integral design; the plane nuclear magnetic resonance micro coil [1] is processed on the surface of the polyimides substrate [3], the micro flow channel structure [2] is rectangle structure and processed on the other surface of the polyimides substrate [3], it is embedded in the inner of the polyimides substrate [3] which is under the plane nuclear magnetic resonance micro coil [1] by the polyimides slice [4]. When it is working, the plane nuclear magnetic resonance micro coil works as the radio-frequency exciter and the signal receiver at the same time, and actuates the sample to be measured to generate the NMR signal and obtain the NMR wave spectrum. The invention can fulfill the detecting requirements of lossless and real-time, the molecular structure and information of images-structure of detecting sample can be supplied. It can be used in fields of analysis detection of tiny sample, real-time dynamic monitoring of chemical reaction, and biological texture and growth status of cell.

The apparatus for deployment of a therapeutic device such as a micro-coil detachably mounts the therapeutic device to a distal portion of a pusher member. In one embodiment, the therapeutic device is detachably mounted to the distal portion of the pusher member by a connector fiber for securing the therapeutic device to the pusher member. The connector fiber passes through a cutter member such as a cutting ring within the distal portion of the pusher member, for cutting the connector fiber to release the therapeutic device when a desired placement of the therapeutic device within the vasculature is achieved.

A persistent-mode magnet, assembled from superconducting annuli, provides a micro coil NMR, in which compactness and manufacturability are provided for a variety of applications. An annular magnet for micro NMR can include a YBCO-annulus Helmholtz coil, for example, that can energized by a magnet system and then transported for use at a second location with an operating system.

The invention relates to an implantable type neural magnetic stimulation device and a method. A micro-coil is embedded into nervous tissues; stimulative current output from an electric stimulation signal generator generates magnetic field around the micro-coil; the induced current of the magnetic field in the nervous tissues around the micro-coil is utilized to adjust the electrical excitation mode of nerve cells around the micro-coil; the magnetic stimulation is realized on the nervous tissues. The implantable type neural magnetic stimulation device comprises the electric stimulation signal generator, the micro-coil and a connecting wire. The device and the method are utilized to stimulate the nervous tissues, so that the stimulative current is prevented from directly injecting into the nervous tissues through a stimulation electrode, thereby reducing the rejective reaction of the nervous tissues to the stimulation electrode, and increasing the long work effectiveness of the embedded stimulation device.

Provided is a GMR-MEMS integrated weak magnetic sensor adopting a plane micro-coil. The base of a micropressure bridge comprises a first base and a second base, the base is fixedly arranged on a spacer, the spacer is fixedly arranged on an insulating substrate, and a bridge body is connected between the first base and the second base. A piezoelectric patch is arranged on the bridge body and between the first base and the second base. A GMR sensitive element is arranged below the bridge body and is symmetrically arranged, magnetic force line collector in the GMR sensitive element comprises a first magnetic force line collector and a second magnetic force line collector, clearance is reserved between the first magnetic force line collector and the second magnetic force line collector, GMR resistors comprises a first GMR resistor, a second GMR resistor, a third GMR resistor and a fourth GMR resistor, the first GMR resistor, the second GMR resistor, the third GMR resistor and the fourth GMR resistor form a Wheatstone bridge, the first GMR resistor is located in the first magnetic force line collector, the second GMR resistor is located in the second magnetic force line collector, and the third GMR resistor and the fourth GMR resistor are located in the clearance. A modulation film is connected on a position, opposite to the modulation film, on the bridge body. The GMR-MEMS integrated weak magnetic sensor adopting the plane micro-coil has the advantages of being simple in structure, low in noise, low in cost, low in hysteresis and the like.

An NMR probe comprising an RF resonator 48 serves in a first mode for conventional sensitivity optimized studies of abundant samples at frequency ω0, and in a second mode for independent sensitivity optimized studies of micro sample quantities at frequency ω0 through use of a removably insertable self-resonant micro-coil 50 within the RF resonator 48 and closely surrounding a micro sample, that is preferably independently removably insertable within the micro-coil. The NMR probe exhibits an enhanced tuning range to resonate in its first mode and in the second mode to inductively couple to the self-resonant micro-coil 50 to induce self-resonance of the micro-coil 50 at ω0.

The invention relates to a nuclear magnetic resonance radio-frequency micro-coil, comprising an upper flat subcoil and a lower flat subcoil which are mutually parallel, i.e. a top layer subcoil (2) and a bottom layer subcoil (3). The two flat subcoils have the same shape, and the distance between the subcoils is larger than or equal to the inside radius of the subcoils; the two flat subcoils are connected through a wire; a micro channel (1) used for containing a sample is positioned between and parallel with the top layer subcoil (2) and the bottom layer subcoil (3). An inner through hole (4)is positioned at the joint between the bottom layer subcoil (3) and the top layer subcoil (2); and an outer through hole (5) is positioned at the joint between the top layer subcoil (2) an a second bonding pad (7). The invention can emit radio-frequency pulse signal and (or) receive free induction decay echo signals coming from a tested object. The micro-coil is manufactured based on SU-8 photoresist by utilizing a micro-electro-mechanical system process on a Pyrex substrate (12). The invention can be used for nuclear magnetic resonance test of a nano-liter bio-chemical sample.

A magnetic particle controller relates to function device making use of magnetic force to control magnetic ball, cell biological molecule and other particles, comprising plate micro coil integrated on front and reverse sides of one substrate, magnetic micro magnetic core and magnetic tip. When electric current passing through the plate micro coil, electromagnetic field is created near it and magnetic particles near the magnetic micro tip will be absorbed onto it, when the electricity is cur off, the particles will be released since the magnetic field force has disappeared. The method of making plate micro coil only relates to a modeling of photoresist and a copper electroplating course , the process is simple and convenient. Including magnetic ball, cell biological molecule and other particles as objections , the invention can be used alone and also as a part to integrate a micro complete analysis system., with the functions of controlling a single particle, counting a single particle values, screening or separating particle mixture, it can be applied in the fields such as cell biology, immunology analysis, micro fluid research and millimicron technology.

The invention discloses a micro-inductance sensor used for detecting metal fragments in oil liquid, which belongs to the application field of sensors. The micro-inductance sensor comprises a tee pipe joint, a piston, a micro-coil, a PCB (printed circuit board), a welding lead, a bonding lead and an insulating layer. The micro-inductance sensor has the characteristics that: (1) the online detection of the metal fragments in the oil liquid can be realized; (2) the metal fragments with small size can be measured by the micro-coil, such as the diameter of 20-120mum, forecast is given off in the early stage of wear failure of equipment so as to take maintenance and repair measures; (3) the ferromagnetism or non-ferromagnetism of the metal fragments can be judged, and more diagnostic messages can be provided for judging whether the wear part is a bearing or a gear; and (4) the array measurement of the oil liquid can be realized, and the amount of oil sample measurement is increased.

The invention provides a transient electromagnetic instrument and a hydro-geologic prospecting method for a mine. A reception terminal of the transient electromagnetic instrument is of a structure of a vector magnetometer. The vector magnetometer comprises a three-axis flux-gate sensor. Micro coils are adopted as sensing units in the X, Y and Z directions of the three-axis flux-gate sensor and used for detecting magnetic field signals comprising change information of a geological magnetic field. According to the transient electromagnetic instrument, the three-axis flux-gate sensor is adopted, the micro coils as the sending units are arranged in the three-axis flux-gate sensor in the X, Y and Z directions, high-sensitivity detection can be carried out on the weak signals, dead areas of close-distance exploratory can be effectively reduced, and the detection accuracy is improved.

A interventional device for RF ablation for use in a RF electrical and / or magnetic field especially of a MR imaging system is disclosed, comprising an ablation catheter which is preferably trackable or can be guided or visualized in the image generated by the MR imaging system by means of a MR micro-coil (102), and which is provided with an ablation electrode (101). The interventional device further comprises a transmission path (103) with line segments (104′, 104″) and transformers (105) therebetween, for connecting the MR micro-coil (102) in a differential mode with a MR receiver (108) and for connecting a RF amplifier (107) in a common mode with the ablation electrode (101) for conveying RF ablation power.

A disposable apparatus with a plurality of preloaded pins such as solder columns, micro-coil springs, or other cylindrically shaped metallic parts (solder columns, et al.) in an array pattern is provided for aligning and dispensing onto a column grid array (CGA) substrate. The apparatus includes a carrier plate with a pattern of holes that is covered by removable covers to retain, position and hold an array of solder columns, et al. Alignment features on the top of the carrier plate plugs into a jig-alignment fixture or frame that precisely positions the solder columns, et al. over a CGA substrate. After inverting (flipping over) the apparatus and jig-fixture or frame upside down, the payload of solder columns, et al. detaches and transfers by gravity onto a pattern of metal pads on the CGA substrate, without the use of vacuum or vibration.

The invention discloses a nuclear magnetic resonance testing planar micro coin and a method for production. A planar micro coin (1) takes a spiral shape and is located on the upper surface of an insulating substrate (2), and the planar micro coin (1) is made of copper. The material of the insulating substrate (2) is glass or polymer. The planar micro coin (1) is provided with an inside end pad and an outside end pad (4, 5), the planar micro coin (1) is integrated with the corresponding two ends pads, and thereby a copper micro electroplating is formed. The thickness of the pads (4, 5) is same with the thickness of the planar micro coin (1). The method for production of the planar micro coin (1) comprises a photoresist mask process and a copper micro electroplating process, wherein the photoresist mask process is used for making masks which are used for micro electroplating, while the copper micro electroplating process is used for making the planar micro coils of micrometer structure preciseness in photoresist mask. The planar micro coils of the invention can be used for component and molecular structural analysis of nuclear magnetic resonance upgrading samples, and can be used for nuclear magnetic resonance micro-imaging as tests for mono cells.

The invention discloses a low-frequency noise suppression device and method for a tunnel magnetoresistive effect sensor. The device comprises a sensitive structure, wherein the sensitive structure comprises a micro coil, the tunnel magnetoresistive effect sensor and a soft magnetic conductor which are sequentially disposed on a same horizontal line; the axial direction of the micro coil is perpendicular to the horizontal line; the micro coil and the tunnel magnetoresistive effect sensor are spaced by a preset distance, and the sensitive direction of the tunnel magnetoresistive effect sensor isperpendicular to the axial direction of the micro coil; an oscillating circuit, which is connected to the micro coil to drive the micro coil to generate a periodic alternating magnetic field; and a low-noise circuit, wherein the low-noise circuit is connected with the tunnel magnetoresistive effect sensor and is used for processing an output signal of the tunnel magnetoresistive effect sensor. According to the low-frequency noise suppression device for the tunnel magnetoresistive effect sensor provided by the invention, low-frequency noises can be suppressed, the signal-to-noise ratio and thedetection sensitivity are improved, the performance is stable, and the cost is low.

A blood vessel blocking device with multi-axis two-class configuration for treating the aneurysm by arranging it in the aneurysm has the micro-coil for generating two-class configuration with minimal energy state. Said two-class configuration has multiple curved segments to respectively define multiple discrete axles. In a preferable scheme, said two-class configuration has multiple circular rings tangent mutually. Another scheme is also described.

A disposable apparatus with a plurality of preloaded pins such as solder columns, micro-coil springs, or other cylindrically shaped metallic parts (solder columns, et al.) in an array pattern is provided for aligning and dispensing onto a column grid array (CGA) substrate. The apparatus is comprised of a carrier plate with a pattern of holes that is covered by a layer of sacrificial adhesive tape with sufficient tackiness to retain, position and hold an array of solder columns, et al. Alignment features on the bottom of the carrier plate plugs into a jig alignment fixture that precisely positions the solder columns, et al. over a CGA substrate. After peeling away the sacrificial adhesive tape from the apparatus, the payload of solder columns, et al. detaches and transfers by gravity onto a pattern of metal pads on the CGA substrate, without the use of vacuum or vibration.

A PEMF web using immersive, flux-guided, micro-coils to direct intense, deeply penetrating, magnetic flux into a subject from each micro-coil capable of pointing in an arbitrary direction. Micro-coils are spooled around iron cores, insulated properly, and soldered to connecting wires, all embedded in a polymeric resin, such as cold-cured silicone resin. Nodes protect, enclose, insulate electrically, and otherwise protect the micro-coils. Connectors between nodes provide mechanical stability against breaking of wires, while permitting folding, bending, buckling, and otherwise deflecting to position the nodes as desired with three degrees of freedom.

The invention discloses a T-shaped positioning device adopting 3D printing in an intrathoracic endoscopy and a manufacturing method thereof. The T-shaped positioning device is of a T-shaped structure adopting the 3D printing and comprising a vertical section and a horizontal section, wherein the upper end of the vertical section and the middle of the horizontal section are intersected at a certain angle, a hollow tube communicated with the surface of the horizontal section is arranged in the vertical section, the lower end of the vertical section is closed, and a nidus marking device connected with the hollow tube is arranged on the vertical section. When the T-shaped positioning device is used, the positioning device is arranged and fixed in the thorax of a patient in a conformal mode and marks the ground-glass node position of the lung through the nidus marking device. The T-shaped positioning device avoids the problem that a node and a hook-wire cannot be touched by adopting a method of touching by hand or a micro-coil is unhooked or falls into the thoracic cavity, the CV exposure to the patient and the working amount of a medical worker are decreased, and meanwhile the influence on the ribs or shoulder blades due to dissection is eliminated.

The invention discloses an intrathoracic L-shaped positioning device adopting 3D printing in an endoscopy and a manufacturing method thereof. The L-shaped positioning device is an L-shaped hollow tube adopting the 3D printing and comprises a vertical section, an elbow and a horizontal section, wherein a head end fit with the top face of the thorax of a patient is arranged at the top of the vertical section, the tail end of the horizontal section is closed, and a nidus marking device connected with the hollow tube is arranged on the horizontal section. When the intrathoracic L-shaped positioning device is used, the positioning device is arranged and fixed in the thorax of the patient in a conformal mode and marks the ground-glass node position of the lung through the nidus marking device. The L-shaped positioning device avoids the problem that a node and a hook-wire cannot be touched by adopting a method of touching by hand or a micro-coil is unhooked or falls into the thoracic cavity, the CV exposure to the patient and the working amount of a medical worker are decreased, and meanwhile the influence on the ribs or shoulder blades due to dissection is eliminated.