Patent ID: 7158005

Claim:
A method for forming an inductor, comprising: forming in a substrate a first plurality of conductive vias radially spaced a first distance from a central axis so as to define a first inner circumference; forming in said substrate a second plurality of conductive vias radially spaced a second distance from said central axis so as to define a second inner circumference, said second distance greater than said first distance; forming in said substrate a third plurality of conductive vias radially spaced a third distance from said central axis so as to define an outer circumference, said third distance greater than said second distance; forming a first plurality of conductive traces disposed in a first plane defined orthogonal to said central axis, said first plurality of conductive traces forming an electrical connection between substantially radially adjacent ones of said first and third plurality of conductive vias; forming a second plurality of conductive traces disposed in said first plane, said second plurality of conductive traces forming an electrical connection between substantially radially adjacent ones of said second and third plurality of conductive vias; forming a third plurality of conductive traces disposed in a second plane spaced from said first plane and defined orthogonal to said central axis to define an electrical connection between circumferentially offset ones of said first and third plurality of conductive vias; forming a fourth plurality of conductive traces disposed in said second plane to define an electrical connection between circumferentially offset ones of said second and third plurality of conductive visa to define a three dimensional toroidal coil.