Longju Liu

Title: Longju Liu: Innovator in Non-Volatile Memory Technology

Introduction

Longju Liu is a prominent inventor based in Fremont, CA, known for his contributions to non-volatile memory technology. He holds a total of 3 patents that showcase his innovative approach to memory systems. His work has significantly impacted the field, particularly in the areas of adaptive voltage offset and erase processes.

Latest Patents

One of Liu's latest patents is titled "Apparatus and methods for smart verify with adaptive voltage offset." This invention includes a control circuit that is coupled to a plurality of non-volatile memory cells. The control circuit is designed to perform a program-verify iteration on a first set of memory cells across multiple program loops. It determines if the first set passes verification to a specific programmed state and calculates a first voltage based on the results. An adaptive voltage offset is then added to this voltage to program a second set of memory cells, with the offset varying according to temperature.

Another significant patent is "Non-volatile memory with adapting erase process." This patent describes a memory system that conducts an erase process for non-volatile memory cells. It includes an erase verify step that compares threshold voltages of the memory cells to a reference voltage. The system determines if the number of cells exceeding this reference voltage is within an allowed bit count. During the erase process, the system also compares the threshold voltages to an intermediate reference voltage, adjusting the allowed bit count accordingly.

Career Highlights

Liu has worked with notable companies in the technology sector, including SanDisk Technologies Inc. and Western Digital Technologies, Inc. His experience in these organizations has allowed him to refine his skills and contribute to advancements in memory technology.

Collaborations

Throughout his career, Liu has collaborated with talented individuals such as Sarath Chandran Puthenthermadam and Jiahui Yuan. These collaborations have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Longju Liu's work in non-volatile memory technology exemplifies his innovative spirit and dedication to advancing the field. His patents reflect a deep understanding of memory systems and their complexities. Liu continues to be a significant figure in the technology landscape, contributing valuable insights and inventions.