This inventor holds 1 USPTO granted patent. Top assignee: Winbond Electronics Corporation. Active years: 2002.
Company Filing History:
Years Active: 2002
Title: Innovations of Keith R. Wald in Nonvolatile Memory Technology
Introduction
Keith R. Wald is an accomplished inventor based in Los Altos, CA (US). He has made significant contributions to the field of nonvolatile memory technology. His innovative approach has led to advancements that enhance the efficiency and performance of memory cells.
Latest Patents
Wald holds a patent for a "Method for operating nonvolatile memory cells." This invention focuses on a new nonvolatile memory cell structure and introduces a novel erase method and apparatus. The method emphasizes source-side injection flash EEPROM cells, which improves the erase efficiency of the cell. By applying a negative voltage to the select-gate terminal, Wald discovered that the erase performance can be significantly enhanced. His patent outlines various embodiments, including the application of three overlapping voltage signals to the cell terminals, with two being negative and one positive. Additionally, it describes a memory cell built on an "internal P-well" within an isolating N-well on a P-type substrate, utilizing four overlapping erase signals for improved performance.
Career Highlights
Wald's career is marked by his dedication to advancing memory technology. His work has been instrumental in developing methods that require moderate voltages for erase operations while maintaining speed. This innovation relaxes the stringent requirements on transistor breakdown voltages for on-chip charge pumps and driver circuitry.
Collaborations
Wald has collaborated with notable colleagues, including Yueh Yale Ma and Chan-Sui Pang. Their combined expertise has contributed to the success of various projects within the field of memory technology.
Conclusion
Keith R. Wald's contributions to nonvolatile memory technology demonstrate his innovative spirit and commitment to enhancing memory cell performance. His patent reflects a significant advancement in the field, showcasing the potential for improved efficiency in memory operations.