Sang Bum Lee

Title: Innovations of Sang Bum Lee in Nonvolatile Memory Technology

Introduction

Sang Bum Lee is a notable inventor based in Cheongju-shi, South Korea. He has made significant contributions to the field of nonvolatile memory technology, holding a total of 2 patents. His work focuses on improving the efficiency and reliability of memory devices, particularly in flash memory applications.

Latest Patents

One of his latest patents is a method of manufacturing a nonvolatile memory cell. This invention utilizes tungsten (W) as an upper layer of a control gate electrode to enhance memory cell integration. The process includes an ion implantation step for forming source and drain regions, followed by a selective oxidization process to prevent abnormal oxidization of tungsten. This innovation effectively reduces the RC delay time of word lines and addresses data retention issues in flash memory.

Another significant patent by Sang Bum Lee is a method for manufacturing a floating gate in a flash memory device. This method aims to minimize the distance between floating gates by patterning a polysilicon film with a specific PSG pattern. The technique involves removing the PSG film pattern and spacer using precise chemical solutions, allowing for a reduction in device size without damaging critical components.

Career Highlights

Sang Bum Lee has worked with prominent companies in the semiconductor industry, including Hynix Semiconductor Inc. and Hyundai Electronics Industries Co. Ltd. His experience in these organizations has contributed to his expertise in memory technology and innovation.

Collaborations

Throughout his career, Sang Bum Lee has collaborated with talented individuals such as Jum Soo Kim and Sung Mun Jung. These partnerships have likely fostered a creative environment that encourages the development of groundbreaking technologies.

Conclusion

Sang Bum Lee's contributions to nonvolatile memory technology demonstrate his commitment to innovation and excellence in the field. His patents reflect a deep understanding of the challenges in memory device manufacturing and offer solutions that enhance performance and reliability.