240 results about "Permalloy" patented technology

A coil component 1 is provided with coil conductors 10a and 10b and a magnetic metal powder containing resin 22 (22a and 22b) covering the coil conductors 10a and 10b. The magnetic metal powder containing resin 22 includes first metal powder having a first average grain diameter, second metal powder having a second average grain diameter that is smaller than the first average grain diameter, and third metal powder having a third average grain diameter that is smaller than the second average grain diameter. The first average grain diameter is 15 μm or more and 100 μm or less. The third average grain diameter is 2 μm or less. The first metal powder mainly contains Permalloy and the second and third metal powders mainly contain carbonyl iron.

The present invention relates to magnetic particle separators using micromachined magnetic arrays and more particularly, to magnetic particle separators or manipulators using controlled magnetization on micromachined magnetic arrays for the separation of cells and other biological materials. The present invention also pertains to using such devices for the separation and analysis of biological materials for immunoassays, DNA sequencing, protein analysis, and biochemical detection applications. The present invention can also be viewed as a novel method for fabricating fully integrated permanent magnet components within any microelectromechanical system (“MEMS”) structures. The present invention also provides a magnetic particle separation and manipulation system for rapid separation and accurate manipulation of magnetic particles in two-dimensional electromagnetic arrays, which utilize high throughput biological analyses. A disposable cartridge can be produced in low cost using a low cost substrate such as plastic or other polymer, glass, or metal. Magnetic flux is generated by conventional or micromachined electromagnets a platform system consisting of magnetic flux sources, magnetic flux guidance, and a microprocessor control interface. By controlling direction of electric currents into inductors on the platform system, arbitrary magnetic poles can be generated on Permalloy structures of the cartridge to separate and manipulate magnetic particles. The magnetic particle separator and manipulator in the present invention can be easily combined with automated detection systems such as a fluorescent monitoring system.

The invention relates to magnetic field shielding textile fabrics, a preparation method and application of the magnetic field shielding textile fabrics. The invention discloses the magnetic field shielding textile fabrics, which are formed by interlacing of permalloy wires and wearing yarns. The magnetic field shielding textile fabrics which are prepared by the permalloy wires can effectively attenuate a stationary magnetic field and a low-frequency magnetic field with DC - 300 Hz, are soft, can be cut, and can be applied to individual protection and magnetic field source shielding.

The invention provides an electromagnetic shielding room. The electromagnetic shielding room comprises a shielding shell, wherein a closed electrometric shielding space is defined inside the shielding shell, the wall surface of the shielding shell comprises a permalloy shielding interlayer, a supporting layer and an aluminum plate shielding interlayer from inside to outside, and the permalloy shielding interlayer and the aluminum plate shielding interlayer are fixed to the inner side and the outer side of the supporting layer respectively. The electromagnetic shielding room not only adopts permalloy to shield a low-frequency magnetic field, but also adopts aluminum plates to shield a high-frequency electromagnetic field, and therefore the high-frequency shielding effect is improved.

The method of the invention includes that a spin triplet state electronic ground state based on a diamond NV color center uses the diamond NV color center as a sensitive component under different magnetic field conditions, and the NV color center is excited by the laser 532 nm; the NV color center emits fluorescence through external microwave, and further, an ODMR spectrum is obtained. Three pairsof distinct Zeeman split peaks can be extracted from the spectrum, and the resonance frequency difference between each pair of peaks is measured. The three different frequency differences come from three different NV directions, and the magnitudes of the three frequency differences are proportional to the magnetic field strength along projections of three symmetry axes in the NV color center, andthe three orientations is sufficient to extract three components of the magnetic field, which is the total field strength in this state. The measured weak magnetic field of the magnetized permalloy is obtained by subtracting the known magnetic field from the total field strength. Furthermore, the detection of the weak magnetic field of the local spin triplet state electronic ground state based onthe diamond NV color center is realized.

A method of detecting an end point of polishing arranged to perform CMP polishing with which an insulating layer of a wafer incorporating a substrate having a metal-containing permalloy layer formed thereon and the insulating layer formed on the metal-containing permalloy layer is chemimechanically polished to expose the flat permalloy layer, the method of detecting an end point of polishing, having the steps of: collecting abrasive material slurry on a surface plate for polishing as a continuous flow from the start or during CMP polishing; continuously mixing a color developing reagent with the collected continuous flow to prepare a specimen for the continuos flow; reading the color of the specimen as a digital value (Ii) by a color identifying sensor; and determining a moment of time at which the digital value (Ii) reaches a digital value (Io) of a specimen of a waste flow of the abrasive material slurry at the end of polishing to be the end of CMP polishing.

A performance of a perpendicular magnetic recording medium, such as an increase in output or a decrease in noise, is improved by providing a good orientation of a magnetic recording layer in the perpendicular magnetic recording medium and by reducing an amount of an initial growth layer in the magnetic recording layer. The perpendicular magnetic recording medium includes an under layer, a magnetic recording layer, a protective film, and a liquid lubrication layer, which are sequentially provided on a non-magnetic substrate. The under layer contains non-magnetic NiFeCr or a permalloy-based soft magnetic material.

The invention discloses a degaussing coil device for a ferrite-permalloy composite magnetic shielding barrel, and is a degaussing coil structure of a low noise magnetic shielding barrel, which is especially suitable for an ultra-high sensitive atom magnetometer, an atom gyroscope and other quantum precision measurement fields. For a composite magnetic shield barrel formed by magnetic shielding barrels of two different magnetic materials, shielding layers of two different materials are separately subjected to degaussing coil arrangement, and then degaussing wires are connected in series together. The ferrite is located in a permalloy magnetic shielding layer for synchronous degaussing instead of a frequently used solenoid type degaussing coil or annular wound degaussing coil. The inner layer ferrite shielding layer with low permeability which is not easy to demagnetize is subjected to combined wiring of the circumferential and axial directions, which enhances the demagnetizing effect ofthe inner ferrite shielding layer and solves the problem that the ferrite shielding barrel is not easy to demagnetize. The coil structure provides a better demagnetization effect, reduces the residual magnetism after demagnetization of the composite magnetic shielding barrel, and reduces the magnetic field gradient caused by the residual magnetism inside the magnetic shielding barrel.

A magnetic storage medium and method of manufacturing the same comprises a substrate, a magnetic material adjacent to the substrate, and regions of variable magnetic permeability in the magnetic material, wherein the magnetic material may comprise a multilayered structure. Moreover, methods are described for making two kinds of media, read only and read/write media. Additionally, the magnetic material comprises any of permalloy, metallic glass, copper, nickel, iron, cobalt, boron, silicon and any combination thereof, and the magnetic material is approximately 10 to 1,000 nm thick. The regions of variable magnetic permeability comprise regions having a lower permeability than other regions, wherein the regions having a lower permeability than other regions is crystalline, and the regions having a higher permeability can be either crystalline or amorphous, and wherein the areas of lower and higher permeability are dimensioned and configured to be approximately 1 to 20 microns in size.

A single-chip magnetic field sensor bridge, comprising a substrate, a reference arm, a sensing arm, shielding structures, and wire bond pads is disclosed. The reference arm and the sense arm respectively comprise at least two rows/columns of reference element strings and sense element strings formed by electrically connecting one or more identical magnetoresistive sensing elements. The reference element strings and the sense element strings are alternately arranged. The magnetoresistive sensing elements are AMR, GMR or TMR sensing elements. The reference element strings are provided with shielding structures thereon, and the sensing element strings are located in gaps between two adjacent shielding structures. The shielding structures are arrays of elongated strips composed of permalloy or another soft ferromagnetic material. The sensors can be implemented as one of three different bridge structures, called a quasi-bridge, a half-bridge, or a full-bridge. This single-chip magnetic field sensor bridge has the advantages of small size, low cost, high sensitivity, small offset, good linearity, and good temperature stability.

An etching mask is made of a metal such as Permalloy (NiFe) and has a T-shaped cross section made up of a vertical bar having width W1 and a lateral bar having width W2. Through ion beam etching with the etching mask, the region in the surface of a workpiece not covered with the mask is selectively removed by the ion beams applied thereto. In the mask the vertical bar has a region obstructed by the lateral bar and a redeposit portion. As a result, the region of the vertical bar near the interface between the workpiece and the vertical bar that substantially determines the pattern width does not change in width. Consequently, a pattern of the workpiece on which etching has been performed has the top width and bottom width substantially equal to width W1 of the vertical bar of the mask. The pattern is rectangular in cross section.

The present invention is method of raising the magento resistance change rate of permalloy film by means of nanometer oxide layer and vacuum annealing. Multilayer Ta/nanometer CoFe oxide layer/NiFe/nanometer CoFe oxide layer/Ta film is formed through depositing on cleaned glass or silicon substrate by means of using one magnetically controlled sputtering instrument. The multilayer Ta/nanometer CoFe oxide layer/NiFe/nanometer CoFe oxide layer/Ta film has nanometer CoFe oxide layers inserted into each of the Ta/NiFe interfaces to check the diffusion between Ta and NiFe, and this can raise the change rate of the permalloy film in anisotropic magento resistance. In addition, the film preparing process has easy control.

The invention relates to a cable path electriferous probing method and device. The method comprises the following steps: sleeving an overground part of a cable to be tested; a transmitter transmits probing signals and senses probing signals to the ground layers which the underground part of the cable to be tested locates in through the clamp; and a receiver receives secondary magnet field signals of sensing target in the cable to be tested and confirms cable path according to intensity of the secondary magnet field signals. The device comprises a sending machine, a receiving machine and a permalloy clamp, the permalloy clamp is a closed type annular clamp and is sleeved on the overground part of the cable to be tested, and a signal input end of the permalloy clamp is connected with a sending machine. Compared with the prior art, the cable path electriferous probing method and device have the advantages of being good in probing accuracy, high in efficiency and the like.

A magnetic sensing method and apparatus include a plurality of bridge circuits, wherein each bridge circuit or element within a bridge is formed on a separate permalloy layer comprising a plurality of permalloy bridge runners. The permalloy bridge runners can be selected such that each permalloy bridge runner possesses a selectable wafer anisotropy to a length of the permalloy bridge runner in order to form a magnetic sensor based on the bridge circuits, maximize the magnetic sensitivity of the magnetic sensor, maximize the matching between bridges and independently control the wafer anisotropy through the use of multiple bridge circuits configured on separate permalloy layers.

For a Tunneling Magnetoresistive (TMR) element, an electrode is used as a magnetic shield or vice versa. This can pose a problem in that noise from a heater source or electromagnetic induction has a direct influence on the TMR element, namely, on a read signal. According to one embodiment of the present invention, however, a thin film head portion has an insulating film, a heater, an electromagnetic shield, a read element, and a write element laminated in this order from the side of a slider. Insulating films isolate the constituent elements above from each other, and a protection film covers the group mentioned above. The heater is a thin film resistive element made of NiCr or the like, and is disposed above the insulating film. The electromagnetic shield is a magnetic film made of permalloy or the like, and covers the heater. The read element comprises a lower shield and electrode, a TMR element, and an upper shield and electrode. The write element comprises a lower magnetic pole piece, an upper magnetic pole piece, and a coil formed therebetween. The thin film head portion is formed with a common terminal.

It is an anisotropism magnetic resistance permalloy film process method, which comprises the following steps: to adopt magnetic control splash method and to select different contents Ni#-[x]Fe#-[1-x] alloy target, wherein x is between 78 to 85; to go to the coating chamber with 99.99 úÑ argon gas for 0.5 to 1 hour before splash; to sustain the gas pressure as 0.1 to 0.5 Pa; to control the thin film impurity content less than 0.1 percent; to process the Ni#-[81]Fe#-[19] thin film with accurate content.

A heat generating sleeve (19) having a high ability to control an amount of heat generation of itself and sufficient strength comprises a heat controlling layer (30) consisting of annealed permalloy, and a main heating layer (31) consisting of unannealed metal plated on a surface of the heat controlling layer (30).

The invention provides a zero-magnetic flux current transformer capable of preventing electricity from being stolen through a high-intensity magnetic field. The zero-magnetic flux current transformer comprises a case and further comprises a first annular iron core, a second annular iron core, a primary winding, a secondary winding, an additional winding and compensation resistors connected to the two ends of the additional winding, wherein the first annular iron core, the second annular iron core, the primary winding, the secondary winding, the additional winding and the compensation resistors are arranged in the case. The compensation resistors meet the formula that N2:N2':N3=1: (1/3-1): (1/3-1). The zero-magnetic flux current transformer has the advantages that the case made of cold-roll steel sheets or electrical pure iron or permalloy or silicon steel can be used for effectively preventing the situation that electricity is stolen through the high-intensity magnetic field; through the combination of magnetic shunt compensation and potential compensation, the requirement that errors are in the levels of 0.02, 0.01 and 0.005 can be met, therefore, the measurement accuracy is improved, the size of the iron cores is reduced, and production cost is lowered. A plastic insulating layer can be used for playing a good role in insulation reinforcement and moist resistance.

The invention relates to a preparation method and application of a metal fiber shielding felt, and in particular relates to a metal fiber shielding felt capable of playing a good attenuation offset role on foreign electromagnetic wave, belonging to the technical field of shielding materials. The metal fiber shielding felt is prepared by comprising the steps of conducting surfaces copper plating, drawing, copper removal, rinsing, stretch-breaking, net forming, sintering, cooling and postprocessing on purchased permalloy wires, thus obtaining the metal fiber shielding felt product. The metal fiber shielding felt is wide in range of application, including shielding of small electronic devices to shielding rooms, shielding canopies, shielding communication cables, transformation rooms, shielding boxes and cabinets. The obtained product is thin, soft, good in reflection property, and good in vortex, and plays a good attenuation offset role on foreign electromagnetic wave, thus being capable of achieving a good shielding effect.

It is a bistable electromagnetic micro machinery relay, which combines the separate process of moving electrode system, plane coil, contact electrode system and magnetic core. The moving electrode system comprises moving electrode, wring beam, contact and frame; the plane coil and contact electrode system are made on the silicon underlay; the moving electrode system is fixed through the frame on the silicon underlay of plane coil and contact electrode; the constant magnetic metal sticks tightly to the surface of the permalloy magnetic core. This relay uses electromagnetic metal to change the magnetic direction of the moving electrode and to turn in the stable on or off status.