Sandra J Wipf

Title: Sandra J. Wipf and Semiconductor Amplifier Innovation.

Introduction

Sandra J. Wipf is an inventor associated with Austin, Texas, and Freescale Semiconductor, Inc. Her patent work includes semiconductor amplifier designs intended to reduce parasitic capacitance and improve power-added efficiency. The available information identifies 4 patents.

Latest Patents

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

The patent description also addresses excessive 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 mitigate that leakage.

Career Highlights

Wipf’s listed work reflects a focus on semiconductor device architecture and amplifier performance. The described design combines trench isolation and carefully arranged semiconductor layers to address capacitance and leakage concerns.

Collaborations

Wipf is associated with Freescale Semiconductor, Inc. The provided information also names Theresa M. Keller and Dragan Zupac as coworkers; it does not specify their roles in the patent.

Conclusion

Sandra J. Wipf’s listed patent work highlights a semiconductor amplifier approach that seeks to improve efficiency by reducing parasitic capacitance while addressing leakage in high-resistivity substrate designs.