Sun-Mi Choi

Title: Sun-Mi Choi: Innovator in Nonvolatile Semiconductor Memory Technology

Introduction

Sun-Mi Choi is a prominent inventor based in Kyunggi-do, South Korea. She has made significant contributions to the field of nonvolatile semiconductor memory devices. With a total of 3 patents to her name, her work has been instrumental in advancing memory technology.

Latest Patents

One of her latest patents is titled "Nonvolatile semiconductor memory device having selective multiple-speed operation mode." This invention discloses a nonvolatile semiconductor memory device that features selective multiple-speed operation modes selected by simple options. The device includes a memory cell array formed of several cell array blocks, each containing multiple cell strings. These strings are constructed with floating gate memory cell transistors, with control gates connected to various word lines. The drain-source channels are series connected between a string select transistor and a ground select transistor. Additionally, the memory device incorporates a multiple-speed mode option part that generates a multiple-speed option signal, along with an addressing circuit that selects a page size and block size of the memory cell array based on the state of the multiple-speed option signal.

Another notable patent is the "Method for optimizing distribution profile of cell threshold voltages in NAND-type flash memory device." This method operates in a non-volatile memory device that consists of multiple blocks formed of memory strings, where memory cells are connected in series. The method includes erasing data held in the memory cells within a block and applying a soft program voltage to the word lines associated with the erased memory cells. This approach improves the threshold voltage profile after an erasing cycle, thereby minimizing program stress during subsequent programming operations.

Career Highlights

Sun-Mi Choi is currently employed at Samsung Electronics Co., Ltd., where she continues to innovate in the field of semiconductor technology. Her work has garnered attention for its practical applications and contributions to enhancing memory device performance.

Collaborations

She has collaborated with notable coworkers, including Yeong-taek Lee and Young-Ho Lim, who have also contributed to advancements in semiconductor technology.

Conclusion

Sun-Mi Choi's innovative work in nonvolatile semiconductor memory technology has positioned her as a key figure in the industry. Her patents reflect her commitment to improving memory device functionality and efficiency.