42 results about "Magnetic annealing" patented technology

A monolithic three-axis linear magnetic sensor and manufacturing method wherein the sensor comprises an X-axis sensor, a Y-axis sensor and a Z-axis sensor. The X-axis sensor comprises a referenced bridge and at least two X ferromagnetic flux guides. The Y-axis sensor comprises a push-pull bridge and at least two Y ferromagnetic flux guides. The Z-axis sensor comprises a push-pull bridge and at least one Z ferromagnetic flux guide. The bridge arms of the referenced bridge and push-pull bridge are each formed by one or more magnetoresistive elements that are electrically interconnected. The directions of the sensing axes and the directions of magnetization of the pinned layers of the magnetoresistive elements are all oriented along the X-axis. This manufacturing method comprises first depositing a magnetoresistive thin film on a wafer, and then performing several processes such as magnetic annealing, photolithography, etching, coating, and the like in order to realize a sensor. This monolithic three-axis linear magnetic sensor has the advantages of low cost, easy manufacturability, good linearity, and high sensitivity.

The invention provides a method for producing a minimized fluxgate sensor in the micro electromechanical technical field, which comprises the following steps: producing a double-sized alignment symbol; sputtering a bottom layer; flinging positive photoresists, exposing and developing; plating a drive coil and a bottom layer coil of a receiving coil, connecting a conductor with a pin of the coil; removing photosensitive resist and a bottom layer; flinging polyimide, solidifying and polishing; sputtering the bottom layer; flinging positive photoresists, exposing and developing; plating a magnetic core, connecting the conductor with a pin; removing positive photoresists and the bottom layer; flinging polyimide, solidifying and polishing; sputtering the bottom layer; flinging the positive photoresists, exposing and developing; plating the drive coil and a top layer coil of the receiving coil and a pin; removing the photosensitive resist and the bottom layer; and magnetic annealing. The invention solves the problems of the traditional fluxgate sensor of poor stability, poor repetitiveness and poor mass production, ensures that the production technique is compatible with the large-scale integrated circuit technique, can be manufactured by integrating the interface circuit, and is widely applied in a plurality of new fields.

The invention relates to a red trimming and punching manufacturing technique for finish forging claw poles of automobile generators, which comprises the following steps: a. blanking; b. heating; c. upsetting; d. dummying; e. finish forging; f. red trimming and punching; g. magnetic annealing; h. cold finishing; i. lathing the surface of excircle; j. finish boring holes. The red trimming and punching manufacturing technique is used for leading the five processes of heating, upsetting, dummying, finish forging and punching with red trimmings to form the flow line production, which reduces the logistic cost, and the temperature of products can reach 950 DEG C to 1050 DEG C when being punched, and the cutting strength of materials is low now. The invention reduces the tonnage of the equipment greatly, prolongs the service life of the equipment and reduces the noise. As the finish forging process and the process of red trimming and punching form the production line, the appearance quality of the finish forged products can be controlled effectively, thus improving the product quality. The punching can be finished when the red trimming is carried out, and the equipment and operators can be reduced; compared with the original art, the red trimming and punching manufacturing technique for the finish forging claw poles of the automobile generators can reduce the drilling processes, can reduce the production cost, enhance the safety and can improve the environment of production fields.

Replacing ruthenium with rhodium as the AFM coupling layer in a synthetically pinned CPP GMR structure enables the AP1/AP2 thicknesses to be increased. This results in improved stability and allows the free layer and AFM layer thicknesses to be decreased, leading to an overall improvement in the device performance. Another key advantage of this structure is that the magnetic annealing requirements (to establish antiparallelism between AP1 and AP2) can be significantly relaxed.

A magnetic annealing device for inserting a recording medium 1 provided with an axial hole formed at a center thereof and having a disk shape into a chamber 10 and applying a heat treatment to the recording medium 1 in a magnetic field is provided with a magnetic circuit for forming a magnetic field in the chamber 10, the magnetic circuit comprises a pair of magnets 4 and 5 disposed with a distance therebetween along an axial direction of the axial hole and having magnetic fields directionally opposed to each other and a first ferromagnetic substance 6 disposed between the pair of magnets 4 and 5, wherein the recording medium 1 to be heat-treated is disposed at an intermediate position between the pair of magnets 4 and 5 facing each other in the state in which the first ferromagnetic substance 6 is inserted into the axial hole. A second ferromagnetic substance 7 having a ring shape is preferably disposed in a periphery of the recording medium 1.

The invention discloses a multifunctional magnetic annealing furnace for magnetizing and annealing. The magnetic annealing furnace comprises a furnace body, a furnace lid, a dolly for driving the furnace lid to open and close and an electrical box with a control circuit. The furnace body is provided with a heating device. A transverse magnetic generator and a longitudinal magnetic generator are arranged inside the furnace body. A cooling device is disposed outside the furnace body. The core space of the furnace body and the cooling device form a circulation loop. A vacuum pump and nitrogen filling equipment are connected on the circulation loop.

A method for manufacturing bodies formed from insulated soft magnetic metal powder by forming an insulating film of an inorganic substance on the surface of particles of a soft magnetic metal powder, compacting and molding the powder, then carrying out a heat treatment to provide a body formed from insulated soft magnetic metal powder the method comprising: compacting and molding the powder; then magnetically annealing the powder at a high temperature above the Curie temperature for the soft magnetic metal powder and below the threshold temperature at which the insulating film is destroyed in a non-oxidizing atmosphere, such as a vacuum, inert gas, or the like; and then carrying out a further heat treatment at a temperature of from 400° C. to 700° C. in an oxidizing atmosphere, such as air, or the like.

The present invention relates to a hot-trimming fabrication technique of the finish-forged claw poles of an automobile generator. The hot-trimming fabrication technique includes the following steps: (a) blanking; (b) heating; (c) continuous upsetting; (d) preforging; (e) finish forging; (f) hot trimming; (g) magnetic annealing; (h) cold shaping; (i) finish machining. Since the hot trimming technique is adopted, the five processes, heating, continuous upsetting, preforging, finish forging and hot trimming, form flow line production, thus reducing the cost of logistics, moreover, the temperature of the product reaches 950 DEG C to 1050 DEG C during hot trimming, at the moment, the shearing strength of the material is low, as a result, the tonnage of equipment can be greatly reduced, the service life of equipment is increased, consequently, the production cost is reduced, and noise is decreased. Since the finish forging and hot trimming processes form a production line, the appearance quality of the finish-forged product is effectively controlled, and therefore the quality of the product is increased.

A heat exchange system and processes for a magnetic annealing tool is provided. The system includes a process chamber housing workpieces to be processed; an element chamber partly surrounding the periphery of the process chamber, at least one means for drawing a vacuum in fluid communication with the process chamber and separately with the element chamber in order to apply a vacuum to either or both of the process and element chamber so as to promote radiation heating of the workpieces; at least one supply of fluid in communication with the process chamber and separately with the element chamber to supply a cooling gas so as to promote conductive cooling of the workpieces; a cooling chamber disposed to surround the element chamber; and means for generating a magnetic field disposed on the outer periphery of the cooling chamber.

An annealing system and method of operating is described. The annealing system includes a furnace having a vacuum chamber wall that defines a processing space into which a plurality of workpieces may be translated and subjected to thermal and magnetic processing, wherein the furnace further includes a heating element assembly having at least one heating element located radially inward from the vacuum chamber wall and immersed within an outer region of the processing space, and wherein the heating element is composed of a non-metallic, anti-magnetic material. The annealing system further includes a magnet system arranged outside the vacuum chamber wall of the furnace, and configured to generate a magnetic field within the processing space.

A method of performing magnetic annealing of a ferromagnetic thin film applied to a substrate includes applying an oscillating magnetic field to the ferromagnetic thin film to induce a current therein and heat the ferromagnetic thin film. A directional magnetic field is applied to the ferromagnetic thin film at the same time as the ferromagnetic thin film is heated, and the ferromagnetic thin film is allowed to acquire a desired magnetic characteristic, and then the oscillating magnetic field is removed and the ferromagnetic thin film is allowed to cool.

The invention discloses a method for realizing magnetic domain overturning by adopting a piezoelectric shearing mode. The method comprises the steps of 1 preparing a magnetoelectric heterojunction; and 2 enabling shear strain generated by electric field induction and a direct-current bias magnetic field to jointly act on the magnetoelectric heterojunction. The magneto-electric heterojunction required by the invention is composed of a common commercial rhombohedral phase piezoelectric single crystal substrate and an industrially common magnetic single-layer film, and the structure is simple. Strong shape anisotropy does not need to be introduced through micromachining process, and bias magnetic field does not need to be applied in the preparation process or exchange bias does not need to beintroduced through subsequent magnetic annealing. Magnetization overturning with electric field regulation and control local magnetic domain larger than 90 degrees can be achieved through magnetoelectric effect of shear strain modulation. The process is simple, and energy consumption is low. The method has important significance in developing low-power-consumption magnetic storage and logic devices.