Company Filing History:
Years Active: 2014-2019
Title: Innovations of Chun-Hung Lai
Introduction
Chun-Hung Lai is a prominent inventor based in Kamakura, Japan. He has made significant contributions to the field of memory devices, holding a total of 10 patents. His work focuses on enhancing the performance and reliability of memory technologies.
Latest Patents
One of his latest patents involves programming dummy memory cells during erase operations to reduce threshold voltage downshift for select gate transistors. This invention describes apparatuses and techniques aimed at minimizing charge loss in select gate transistors within memory devices. In this approach, a dummy memory cell adjacent to a select gate transistor is weakly programmed during an erase operation by applying a program pulse. This pulse can be applied after an erase bias is set and before an erase-verify test is conducted. The magnitude of the program pulse can be adjusted in successive erase loops, enhancing the efficiency of the erase operation.
Another notable patent addresses the sequential deselection of word lines to suppress first read issues. This system reduces trapped electrons within a NAND string during sensing operations. Control circuits discharge control gates of contiguous memory cell transistors in a specific order, starting from one end of the NAND string to the other. This method ensures that the control gates are discharged from a read pass voltage to a lower voltage, improving the overall performance of the memory device.
Career Highlights
Chun-Hung Lai is currently employed at Sandisk Technologies Inc., where he continues to innovate in the field of memory technology. His work has been instrumental in advancing the capabilities of NAND flash memory and other related technologies.
Collaborations
He has collaborated with notable colleagues, including Deepanshu Dutta and Shih-Chung Lee, contributing to various projects that enhance memory device performance.
Conclusion
Chun-Hung Lai's contributions to memory technology through his innovative patents have significantly impacted the industry. His work continues to pave the way for advancements in memory devices, showcasing his expertise and dedication to innovation.