Current sensor and molding method thereof

A molding method of the current sensor having a conductor through which a current flows, a shield plate of ring shape arranged around a flow direction of the current of the conductor, and a magneto-electronic conversion element for detecting magnetic flux density of a magnetic field which is generated when the current flows through the conductor and converting into an electric signal, comprising the steps of:

• injecting a molding material into a die for a holder in condition that a wiring board on which the magneto-electronic conversion element is mounted is inserted in the die for the holder, and molding a holder sealing the wiring board;
• pressing the conductor in a pressing groove arranged in an outer side surface of the holder, thereafter pressing the outer side surface of the holder in the shield plate, and molding a holder assembly;
• and
• injecting a molding material into a die for a chassis in condition that the holder assembly is inserted in the die for the chassis, and molding the chassis sealing the holder assembly.