Patent ID: 7087450
Filing Date: 2006-08-08
Classification: G01R,Y10T

Abstract:
1. A method for producing a fluxgate sensor, comprising the steps of: etching a first metal plate on a first substrate according to a predetermined pattern for forming an excitation coil, the first substrate being formed of metal plates adhered to one and the other sides of a first prepreg; forming a second substrate by adhering a second prepreg and a soft magnetic film onto the etched upper portion of the first metal plate of the first substrate; forming an upper soft magnetic core and a lower soft magnetic core by etching the soft magnetic film adhered to one and the other sides of the second substrate; forming a third substrate by adhering a third prepreg and a second metal plate onto the upper core of the upper and the lower soft magnetic cores; forming via holes through the third substrate, at locations horizontally distanced from one and the other sides of each of the soft magnetic cores; metal-plating the via holes to form a third metal plate; etching the third metal plate adhered onto one and the other sides of the third substrate according to the predetermined pattern for an excitation coil and a pick-up coil; and forming a pad for an electrical conductivity, on the upper portion of the third substrate where the excitation coil and the pick-up coil are formed.