John K Stewart, Jr

Title: Innovations of John K Stewart, Jr.

Introduction

John K Stewart, Jr. is a notable inventor based in West Carrollton, OH (US). He has made significant contributions to the field of semiconductor technology, holding a total of 3 patents. His work focuses on enhancing the reliability and efficiency of integrated circuits.

Latest Patents

Stewart's latest patents include a mixed dielectric process and a nonvolatile memory device fabricated thereby. This innovative process allows for the fabrication of both volatile and nonvolatile field effect devices on a common semiconductor wafer. A key feature of this process is the elimination of nitride from beneath any poly I layers while selectively retaining sandwiched and coextensive segments of nitride and poly II layers for the memory devices. The method begins with a wafer treated according to the general localized oxidation of silicon process, followed by a series of implants and etching steps that enhance the reliability of the complete integrated circuit.

Another significant patent is a method for conditioning a nitride surface. This method involves treating the nitride surface with ionized oxygen in a vacuum, which conditions the surface for subsequent processing steps. This treatment improves the adhesion characteristics of a photoresist film to a silicon nitride surface, facilitating more effective etching processes.

Career Highlights

John K Stewart, Jr. is currently employed at NCR Corporation, where he continues to innovate in the field of semiconductor technology. His work has contributed to advancements in nonvolatile memory devices, which are crucial for modern electronic applications.

Collaborations

Stewart has collaborated with notable colleagues such as Murray L Trudel and Michael R Gulett, further enhancing the impact of his work in the industry.

Conclusion

John K Stewart, Jr. is a distinguished inventor whose contributions to semiconductor technology have paved the way for advancements in nonvolatile memory devices. His innovative processes and methods continue to influence the field, showcasing his commitment to enhancing the reliability of integrated circuits.