Patent ID: 7389576

Claim:
A method of manufacturing a micro flux gate sensor comprising: (a) forming a metal pattern including lower coil portions of an excitation coil and a magnetic field detecting coil on a wafer; (b) forming a first insulation layer to cover the metal pattern and forming viaholes to expose a certain portion of the metal pattern; (c) applying an electrical signal through the metal pattern and plating the viaholes with a metal material to form a connection portion; (d) forming a magnetic core on an upper portion of the first insulation layer; (e) forming a second insulation layer to cover the magnetic core and forming an upper coil portion electrically connected to the connection portion to form the excitation coil and the magnetic field detecting coil; (f) forming a third insulation layer to cover the upper coil portion; and (g) removing, a certain portion of the metal pattern to leave at least the lower coil portion of the metal pattern.