Patent ID: 7696852

Claim:
A method for making a cell core transformer having an efficient flux path with reduced losses comprising: forming a first primary conductor through a first via hole in a slab of ferromagnetic material; forming a second primary conductor through a second via hole in said slab and coupled to said first primary conductor, configured such that a direction of a current in said first via would be opposite to the direction of a current in said second via, wherein a resulting flux generated between said first via hole and said second via hole has the same orientation; forming a first secondary conductor in said first via hole, configured such that if a current is in said first primary conductor, the magnetic flux produced from the current in said first primary conductor would induce a voltage in said first secondary conductor; forming a second secondary conductor in said second via hole and coupled to said first secondary conductor, configured such that if a current is in said second primary conductor, the magnetic flux produced from the current in said second primary conductor would induce a voltage in said second secondary conductor; and forming electrical printed circuits on a top surface and a bottom surface of the slab, wherein said electrical printed circuits are coupled to said first primary conductor, second primary conductor, first secondary conductor and second secondary conductor.