Shigeru Yamatani

Title: Shigeru Yamatani: Innovator in Electrically Programmable Memory

Introduction

Shigeru Yamatani is a notable inventor based in Fuchu, Japan. He has made significant contributions to the field of memory technology, particularly in the development of electrically programmable read-only memory (EPROM). His innovative work has led to advancements that enhance the efficiency and reliability of memory devices.

Latest Patents

Yamatani holds a patent for an "Electrically programmable read only memory having reduced leakage current." This invention addresses the issue of leakage current caused by parasitic capacitance in non-volatile memory elements. The design includes a plurality of memory elements with control gates connected to a first word line and drains coupled to a write-down circuit. To mitigate leakage current, at least one source electrode is connected to ground potential through a switch MISFET. This configuration ensures that when a non-selection level signal is applied, the switch remains non-conductive, effectively preventing leakage. Additionally, the write-down circuit incorporates a pn-junction element to maintain rewrite-down efficiency, thus preventing deterioration during operations.

Career Highlights

Shigeru Yamatani is associated with Hitachi, Ltd., a leading company in technology and electronics. His work at Hitachi has been instrumental in advancing memory technologies, contributing to the company's reputation for innovation in the electronics sector.

Collaborations

Yamatani has collaborated with notable colleagues, including Minoru Fukuda and Kotaro Nishimura. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas in the field of memory technology.

Conclusion

Shigeru Yamatani's contributions to electrically programmable memory have made a significant impact on the technology landscape. His innovative solutions to leakage current issues demonstrate his expertise and commitment to advancing memory technology.