US 2015/0028979 A1 · HIGH EFFICIENCY ON-CHIP 3D TRANSFORMER STRUCTURE

Abstract

A transformer structure includes at least three sections, each corresponding to metal layers of an integrated circuit. A first section of the at least three sections is electrically coupled to a third section with a second section disposed between the first and third sections. The at least three sections includes inductor coils, all of which are wound in a same direction and voltage phase starting at an outer terminal and continuing to an inner terminal of each inductor coil. At least one radial wiring channel passes through a portion of a coil in one of the three sections to provide an external connection to an internal terminal of the coil in at least one of the three sections.

Claims20

Dependent claims

A transformer structure, comprising:

at least three sections, each corresponding to metal layers of an integrated circuit;
a first section of the at least three sections being electrically coupled to a third section with a second section disposed between the first and third sections;
the at least three sections including inductor coils, all of which are wound in a same direction and voltage phase starting at an outer terminal and continuing to an inner terminal of each inductor coil;
and
at least one radial wiring channel passes through a portion of a coil in one of the three sections to provide an external connection to an internal terminal of the coil in at least one of the three sections.

2 more elements

Dependencies are inferred from the claim text.

High efficiency on-chip 3d transformer structure

Life of this patent

High efficiency on-chip 3d transformer structure

Life of this patent

Abstract

Claims20