Wing Leung

Title: Innovations by Wing Leung in Flash Memory Technology

Introduction

Wing Leung is a notable inventor based in Palo Alto, California, recognized for his contributions to flash memory technology. With a total of four patents to his name, Leung has made significant advancements in the field, particularly in improving the efficiency and reliability of memory devices.

Latest Patents

One of Wing Leung's latest patents is focused on cycling improvement using higher erase bias. This invention provides methods for erasing flash memory cells that enhance erase cycling speed and reliability. One embodiment involves interactively applying a stepped or ramped drain voltage pattern to the memory cells' drain and a pulsed gate voltage pattern to their gate for a predetermined number of gate pulses or until all memory cells are erased. Another embodiment introduces an erase bias circuit designed for erasing a sector of flash memory cells. This circuit includes row and column decoders that select wordline rows and columns of cells, respectively, along with a supply bias arrangement that provides source and drain supply voltages for the sector. Additionally, a patterned pulse bias arrangement is configured to deliver a pulsed gate voltage pattern to the gates of the selected cells and a drain voltage pattern to their drains.

Another significant patent by Leung is the repetitive erase verify technique for flash memory devices. This technique employs erase verify operations that can be utilized for a flash memory device with an array of memory cells. The operations involve repetitive erase verify testing to double-check previously verified bits that may relax or settle into an under-erased state. Following an initial erase verify procedure, a secondary erase verify procedure may be performed, applying additional erase pulses to bits that have become under-erased.

Career Highlights

Wing Leung has built a distinguished career in the field of memory technology, contributing to advancements that have improved the performance of flash memory devices. His innovative approaches have garnered attention and recognition within the industry.

Collaborations

Leung has collaborated with notable colleagues, including Sheung-Hee Park and Edward Franklin Runnion, who have contributed to his work in various capacities.

Conclusion

Wing Leung's innovative contributions to flash memory technology have significantly impacted the industry, showcasing his expertise and dedication to advancing memory device performance. His patents reflect a commitment to enhancing the reliability and efficiency of flash memory systems.