Location History:
- Sakuramura, JP (1986)
- Tsukuba, JP (1999 - 2019)
- Ibaraki, JP (1988 - 2022)
Company Filing History:
14 out of 1,714 
3 out of 1,037 
3 out of 6 
Years Active: 1986-2022
Title: Innovations by Shigeki Sakai in Semiconductor Technology
Introduction
Shigeki Sakai, a prominent inventor based in Tsukuba, Japan, has made significant contributions to the field of semiconductor technology. With an impressive portfolio of 21 patents, Sakai has been instrumental in developing advanced semiconductor memory elements and transistors that enhance data retention and processing capabilities.
Latest Patents
Among Sakai's latest innovations are two groundbreaking patents. The first is a method of making a semiconductor ferroelectric memory element, specifically designed to create a ferroelectric field-effect transistor (FeFET). This innovative FeFET achieves a film thickness (dr) ranging from 59 nm to 150 nm without compromising essential properties, including data retention for up to 10 seconds and rewrite endurance of at least 10 cycles. Additionally, it allows for a memory window of 0.40 V or more, under a gate voltage sweep amplitude of no more than 3.3 V.
The second patent details the production methods for semiconductor memory elements, characterized by a unique laminated structure. This structure features a memory member and conductor layered on a semiconductor substrate, with precise dimensions that optimize performance. The bottom surface of the memory member measures no more than 100 nm, while the distance between the conductor and semiconductor substrate is designed to be at least twice that of the bottom surface width.
Career Highlights
Sakai has had a distinguished career working with prestigious institutions, including the National Institute of Advanced Industrial Science and Technology (AIST) and the Agency of Industrial Science and Technology. His focus on innovative memory technologies has positioned him as a leader in semiconductor research, paving the way for future advancements in data storage solutions.
Collaborations
Throughout his career, Sakai has collaborated with notable colleagues, including Mitsue Takahashi and Masaki Kusuhara. These partnerships have fostered a dynamic exchange of ideas and propelled advancements in semiconductor technology.
Conclusion
Shigeki Sakai's contributions to semiconductor memory technologies illustrate his role as a key innovator in the field. With a robust portfolio of patents and collaborative efforts with esteemed colleagues, he continues to advance the capabilities of semiconductor devices, supporting the evolving demands of technology-centric industries.