Patent ID: 7407596
Filing Date: 2008-08-05
Classification: G01R,Y10T

Abstract:
1. A manufacturing method of a fluxgate sensor, comprising the steps of: bonding a prepreg and a soft magnetic film on a first metal plate; forming a soft magnetic core by etching the soft magnetic film; forming a first substrate by bonding a prepreg and second metal plates on an upper portion of the soft magnetic core; forming first via holes in the first substrate, at locations horizontally distanced away from one and the other sides of the soft magnetic core; metal-plating the first via holes; forming an excitation coil on both surfaces of the substrate by etching; forming a second substrate by bonding a prepreg and third metal plates on both portions of the excitation coil; forming second via holes in the second substrate, corresponding to the first via holes; metal-plating the second via holes; forming a pick-up coil by etching both surfaces of the second substrate; forming a third substrate by bonding a prepreg and fourth metal plates on both portions of the pick-up coil; and forming a pad for an electrical conductivity, by etching both surfaces of the third substrate.