Theresa M Keller

Title: Theresa M. Keller: Semiconductor Amplifier Innovation

Introduction

Theresa M. Keller is an inventor associated with Chandler, Arizona, and Freescale Semiconductor, Inc. Her patent work includes semiconductor amplifier designs intended to reduce parasitic capacitance and improve power-added efficiency. The available information lists 3 patents.

Latest Patents

Keller’s listed patent, “High Efficiency Amplifier with Reduced Parasitic Capacitance,” describes a semiconductor amplifier built from one or more unit amplifying cells on a substrate. Dielectric-filled trench isolation walls surround individual cells and groups of cells, while selected semiconductor regions remain electrically floating relative to the substrate. This arrangement is designed to reduce parasitic capacitance and improve the amplifier’s power-added efficiency.

The patent description also addresses leakage between buried-layer contacts on high-resistivity substrates. It proposes adding a semiconductor layer with intermediate doping between the substrate and the buried-layer contacts to help prevent excessive leakage.

Career Highlights

Keller’s documented patent contribution focuses on semiconductor device architecture and amplifier performance. The described design combines trench isolation and substrate-layer engineering to address capacitance and leakage concerns.

Collaborations

Keller’s listed coworkers include Dragan Zupac and Sandra J. Wipf. The available information associates her with Freescale Semiconductor, Inc.

Conclusion

Theresa M. Keller’s patent work reflects an engineering approach to improving semiconductor amplifier efficiency by managing parasitic capacitance and leakage.