# US 2013/0278246 A1 · Bias Field Generator and Method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0278246 A1 - Document ID: US20130278246A1 - Status: Published application - Kind: A1 - Application number: 13/453,199 - Filed: 2012-04-23 - Published: 2013-10-24 - Earliest claimed: 2012-04-23 - Assignees: Infineon Technologies AG - Inventors: Franz Stegerer; Klaus Elian; Michael Weber - Web page: https://patentgrep.com/patent/US20130278246A1 ## CPC - H01F 7/0294: {Detection, inspection, magnetic treatment} - G01R 33/0011: {comprising means, e.g. flux concentrators, flux guides, for guiding or concentrating the magnetic flux, e.g. to the magnetic sensor} - G01R 33/0017: {Means for compensating offset magnetic fields or the magnetic flux to be measured; Means for generating calibration magnetic fields} - G01R 33/09: Magnetoresistive devices - Y10T 29/4902: Electromagnet, transformer or inductor - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A bias field generator can provide a magnetic bias field for a magnetic sensor. The bias field generator includes a body with magnetic or magnetizable material. A recess is formed in the body. The recess is adapted to a package of the magnetic sensor. ## Claims ### Claim 1 A device, comprising a bias field generator configured to provide a magnetic bias field for a magnetic sensor, wherein the bias field generator comprises: a body comprising magnetic or magnetizable material; a magnetic sensor; a package accommodating the magnetic sensor; a recess formed in the body, wherein the recess is adapted to the package. ### Claim 2 (depends on 1) The device of claim 1, wherein the package is arranged in the recess. ### Claim 3 (depends on 2) The device of claim 2, wherein the recess has a first width in a first direction, the first width corresponding to an outer dimension of the package; the recess has a border; and the package is arranged in the recess such that the package abuts with at least two opposite points at the border of the recess in the first direction. ### Claim 4 (depends on 3) The device of claim 3, wherein the body has a first surface and a second surface delineating the recess in the first direction, wherein the first surface and the second surface have an essentially convex shape. ### Claim 5 (depends on 1) The device of claim 1, wherein the recess is open at least at one side in a second direction, wherein the second direction is essentially perpendicular to the first direction, and the body is configured to accommodate the package being inserted into the recess along the second direction. ### Claim 6 (depends on 5) The device of claim 5, wherein the recess is delineated by the body at one side in the second direction and the inserted package abuts the body in the second direction. ### Claim 7 (depends on 1) The device of claim 1, wherein the recess has a first width in a first direction, the first width corresponding to an outer dimension of the package; the recess is open at least at one side in a second direction, wherein the second direction is essentially perpendicular to the first direction; and the recess is closed at least at one side in a third direction, wherein the third direction is essentially perpendicular to the first direction and to the second direction, and the package may be inserted into the recess along the second direction. ### Claim 8 (depends on 1) The device of claim 1, wherein the recess comprises a cavity formed in the body, the cavity being configured to a shape the magnetic bias field. ### Claim 9 (depends on 1) The device of claim 1, wherein the body comprises two separate body parts, each body part comprising a part of the recess. ### Claim 10 A device, comprising: a bias magnet to provide a magnetic bias field for a magnetic sensor, wherein the bias magnet is shaped to provide a holder for the magnetic sensor. ### Claim 11 (depends on 10) The device of claim 10, wherein the holder is formed by a notch into which a housing of the magnetic sensor may be inserted. ### Claim 12 (depends on 11) The device of claim 11, wherein the notch is shaped to hold the housing of the magnetic sensor in a form-fitting manner. ### Claim 13 (depends on 10) The device of claim 10, wherein the notch is shaped to hold the housing of the magnetic sensor in at least a first direction and a second direction, the first and second direction being perpendicular to each other. ### Claim 14 (depends on 10) The device of claim 10, wherein the bias magnet comprises a plurality of magnet parts and the holder is formed by assembling the magnet parts together. ### Claim 15 (depends on 10) The device of claim 10, wherein the bias magnet is further shaped for shaping the magnetic bias field. ### Claim 16 A sensor module, comprising: a magnetic sensor for sensing a magnetic field; a housing in which the magnetic sensor is encapsulated; and a bias magnet to provide a magnetic bias field for the magnetic sensor; wherein the bias magnet is shaped to provide a holder for the housing of the magnetic sensor, the housing being disposed within the holder. ### Claim 17 (depends on 16) The sensor module of claim 16, further comprising a magnetic bias field shaping cavity in the bias magnet. ### Claim 18 (depends on 17) The sensor module of claim 17, wherein the magnetic bias field shaping cavity comprises a flux controller. ### Claim 19 (depends on 16) The sensor module of claim 16, further comprising a further holding mechanism to fix the magnetic sensor in the holder. ### Claim 20 A method for manufacturing a sensor module, the method comprising: providing a magnetic sensor that is encapsulated in a housing; providing a bias magnet shaped to provide a holder for the housing of the magnetic sensor; and inserting the housing into the holder of the bias magnet. ### Claim 21 (depends on 20) The method of claim 20, further comprising fixing the housing in the holder. ### Claim 22 (depends on 20) The method of claim 20, further comprising housing the sensor module in a sensor module housing. ### Claim 23 (depends on 20) The method of claim 20, further comprising: evaluating outer dimensions of the housing; manufacturing the bias magnet configured to provide a magnetic bias field adapted to the magnetic sensor and shaped to hold the housing in the magnetic bias field. ### Claim 24 A method for manufacturing a bias field generator to provide a magnetic bias field for a magnetic sensor, comprising: providing a powder of magnetic particles; and molding or pressing the powder into a body that is shaped to provide a holder for a housing of the magnetic sensor. ### Claim 25 (depends on 24) The method of claim 24 wherein the molding or pressing comprises forming two parts of the body the method further comprising assembling the two parts to together provide the holder for the housing. ### Claim 26 (depends on 24) The method of claim 24, wherein the molding or pressing comprises molding or pressing the powder into the body that is further shaped to form a cavity to shape the magnetic bias field. ### Claim 27 (depends on 25) The method of claim 25, further comprising filling the cavity with a magnetically soft material to form a flux controller. ### Claim 28 (depends on 24) The method of claim 24, wherein the body is formed in a layered structure.