Patent ID: 8110119

Claim:
A method of manufacturing a magnetic field sensor device, the method comprising: applying a mask on a substrate; performing a wet etching procedure on the substrate for generating at least one groove having tilted side walls, thereby defining a first planar section of the substrate and at least a first tilted side wall and at least a second tilted side wall, wherein the first tilted side wall intersects with the first planar section such that an imaginary line normal to the surface of the first planar section intersects with an imaginary line normal to the surface of the at least first tilted side wall at a first angle, wherein the second tilted side wall intersects with the first planar section such that an imaginary line normal to the surface of the first planar section intersects with an imaginary line normal to the surface of the at least second tilted side wall at a second angle, wherein a line defined along an intersection of the first tilted side wall and the first planar section is not parallel to a line defined along an intersection of the second tilted side wall and the first planar section; depositing at least one layer of magnetoresistive material onto the surface of at least the first tilted side wall; and depositing at least one layer of magnetoresistive material onto the surface of at least a second tilted side wall.