A new method and structure is provided to connect a planar, spiral inductor
to underlying interconnect metal, the interconnect metal has been created
over a semiconductor surface. A layer of dielectric followed by a layer of
passivation is deposited over the semiconductor surface, including the
surface of the underlying interconnect metal. Large first vias are created
through the layers of passivation and dielectric. The large first vias
align with the patterned interconnect metal, providing low-resistivity
points of interconnect between the spiral inductor, which is created on
the surface of the layer of passivation concurrent with the creation of
the large first vias, and the patterned interconnect metal. A thick layer
of polyimide is deposited over the surface of the layer of passivation,
including the surface of the spiral inductor and the large first vias. The
invention can further be extended by creating at least one second via
through the thick layer of polyimide aligned with at least one of the
created first vias. A patterned and etched layer of metal that fills the
second via creates a re-distribution layer on the surface of the thick
layer of polyimide for flip chip interconnects.