Shigeru Kumagai

Title: Shigeru Kumagai: Innovator in Semiconductor Technology

Introduction

Shigeru Kumagai is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 6 patents. His work has been instrumental in advancing memory device technology, showcasing his expertise and innovative spirit.

Latest Patents

One of his latest patents is a semiconductor memory device with an address transition actuated dummy cell. This invention involves a first load circuit coupled with column lines, where first dummy cells are connected to a dummy column line. A second load circuit is also connected to the dummy column line, along with a second dummy cell. A sense amplifier is utilized to sense the data stored in the memory cell based on the potential difference between the column line and the dummy column line. In this arrangement, the second dummy cell is typically set in an on state, which helps manage the current flowing to the dummy line during row line switching, thereby stabilizing the reference potential.

Another notable patent is a delay circuit that resets after pulse-like noise. This semiconductor integrated circuit includes delay means that generate an output signal delayed by a predetermined time in response to changes in the input signal's logic level. The delay means also receives a control signal, generating an internal control signal that is delayed in a similar manner. This invention incorporates a capacitor for delaying the control signal and a resistor connected to the capacitor, enhancing the circuit's performance.

Career Highlights

Shigeru Kumagai is associated with Kabushiki Kaisha Toshiba, a leading company in the technology sector. His work at Toshiba has allowed him to focus on innovative semiconductor solutions, contributing to the company's reputation for excellence in technology.

Collaborations

Throughout his career, Kumagai has collaborated with notable colleagues, including Hiroto Nakai and Hiroshi Iwahashi. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies in the semiconductor field.

Conclusion

Shigeru Kumagai's contributions to semiconductor technology through his patents and collaborations highlight his role as a key innovator in the industry. His work continues to influence advancements in memory devices, showcasing the importance of innovation in technology.