International Business Machines Corporation

Globalfoundries Inc.

Globalfoundries U.S. 2 LLC

Venkata Nr Vanukuru

Robert Allen Groves

Robert L Barry

Sarath L K Parambil

An integrated circuit transformer structure includes at least two conductor groups stacked in parallel in different layers. A first spiral track is formed in the at least two conductor groups, the first spiral track included first turns of a first radius within each of the at least two conductor groups, and second turns of a second radius within each of the at least two conductor groups, the first and second turns being electrically connected. A second spiral track is formed in the at least two conductor groups, the second spiral track including third turns of a third radius within each of the at least two conductor groups and disposed in a same plane between the first and second turns in each of the at least two conductor groups.

High efficiency on-chip 3D transformer structure

A series stacked, solenoidally wound, multipath inductor includes a plurality of turns disposed about a center region on two layers. The turns on the two layers have corresponding geometry therebetween. Each of the plurality of turns includes two or more segments that extend length-wise along the turns. The segments have positions that vary from an innermost position relative to the center region and an outermost position relative to the center region. A cross-over architecture is configured to couple the segments of a turn on one layer with the segments on a turn on another layer to form segment paths that have a substantially same length for all segment paths in a segment path grouping between the two layers.

Solenoidal series stacked multipath inductor

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.

A parallel stacked multipath inductor includes a first layer including turns disposed about a center region, the turns on the first layer having segments that extend length-wise along the turns, the segments having positions that vary from an innermost position relative to the center region and an outermost position relative to the center region. A second layer includes turns electrically connected to the first layer along its length and disposed about the center region, the turns on the second layer having segments that extend length-wise along the turns, the segments having positions that vary from an innermost position and an outermost position relative to the center region. Cross-over architectures are configured to couple the segments on the first layer with the segments on the second layer to form segment paths that have a substantially same length for all segment paths per turn between the first and second layers.

High-Q multipath parallel stacked inductor

A three-dimensional multipath inductor includes turns disposed about a center region on two layers, the turns on the two layers having corresponding geometry therebetween. Each of the turns is comprised of two or more segments that extend length-wise along the turns, and the segments have positions that vary from an innermost position relative to the center region and an outermost position relative to the center region. A lateral cross-over is configured to couple the segments of at least one turn on one layer with the segments on a turn on a same layer to form segment paths that have a substantially same length for all segment paths in a grouping of segment paths on that same layer. A vertical cross-over is configured to couple the segments on different vertically stacked metal layers to have the segment groups with a substantially same length for all segment paths based on vertical lengths.

3D multipath inductor

A transformer structure includes a first coil having two sections of spiral, with a top section including a plurality of metal layers occupying top X metal layers and a bottom section including a plurality of metal layers occupying bottom Z metal layers, where X and Z represent a number of metal layers having a specific number selected to provide a particular performance of the first coil. A second coil of the transformer is disposed between the two sections of the first coil and includes a plurality of metal layers where Y represents a number of vertically adjacent metal layers, with the specific number chosen to provide the particular performance, such that a sum X+Y+Z represents a total number of vertical metal layers for the transformer structure.

An integrated circuit transformer structure includes at least two conductor groups stacked in parallel in different layers. A first spiral track is formed in the at least two conductor groups, the first spiral track includes first turns of a first radius within each of the at least two conductor groups, and second turns of a second radius within each of the at least two conductor groups, the first and second turns being electrically connected. A second spiral track is formed in the at least two conductor groups, the second spiral track including a plurality of adjacent turns of one or more radii within each of the at least two conductor groups and disposed in a same plane between the first and second turns in each of the at least two conductor groups.

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Bengaluru, India

Venkata Nr Vanukuru