Keiichi Haraguchi

Title: Innovations of Keiichi Haraguchi in Nonvolatile Semiconductor Memory Devices

Introduction

Keiichi Haraguchi is a prominent inventor based in Hitachinaka, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of nonvolatile memory devices. With a total of five patents to his name, Haraguchi's work has advanced the capabilities and efficiency of memory storage solutions.

Latest Patents

One of Haraguchi's latest patents is focused on a nonvolatile semiconductor memory device and a method of the same. This innovation promotes a reduction in size for nonvolatile semiconductors used in memory devices while increasing their capacity. Each memory cell of the flash memory is designed with a field effect transistor that includes a first gate insulator film formed on a p-type well. The design features a selector gate, floating gates, and a control gate, all contributing to enhanced performance and efficiency.

Another notable patent involves the method of manufacturing a nonvolatile semiconductor memory device. This method pertains to an AND flash memory where the memory cell consists of n-type semiconductor regions formed in a p-type well. The manufacturing process includes the introduction of arsenic into the p-type well and thermal treatment using an ISSG oxidation method to address drain disturb problems.

Career Highlights

Keiichi Haraguchi is currently employed at Renesas Technology Corporation, where he continues to innovate in the semiconductor field. His work has been instrumental in pushing the boundaries of memory technology, making significant strides in both design and manufacturing processes.

Collaborations

Haraguchi has collaborated with notable colleagues such as Kenji Kanamitsu and Masataka Kato. These partnerships have fostered a collaborative environment that enhances the development of cutting-edge technologies in the semiconductor industry.

Conclusion

Keiichi Haraguchi's contributions to nonvolatile semiconductor memory devices exemplify the impact of innovative thinking in technology. His patents reflect a commitment to advancing memory solutions, and his work continues to influence the field significantly.