Keiichiro Doi

Title: Keiichiro Doi: Innovator in Semiconductor Technology

Introduction

Keiichiro Doi is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 3 patents. His innovative work has led to advancements in various electronic devices, showcasing his expertise and creativity.

Latest Patents

One of Doi's latest patents is for a field effect transistor with an active layer apart from the guard-ring. This invention addresses the challenges associated with gate junction capacitance and gate leakage current in field effect transistors (JFETs) that utilize a compound semiconducting substrate. By separating the guard-ring from the active layer, Doi's design improves noise characteristics and high-frequency performance without increasing gate resistance.

Another notable patent is a stylus for a capacity change detection type disc system. This stylus is designed to read information signals, such as audio or video, from a disc surface that contains pits corresponding to these signals. The stylus features a body made of diamond, with argon plus ions implanted to graphitize the diamond, creating a conductive layer that serves as a detecting electrode. This innovative approach enhances the performance of the stylus in detecting signals.

Career Highlights

Keiichiro Doi is currently associated with the Victor Company of Japan, Limited, where he continues to develop cutting-edge technologies. His work has not only contributed to the company's success but has also advanced the field of electronics.

Collaborations

Doi has collaborated with notable colleagues, including Hideaki Mizuno and Yoshihiro Hori. These partnerships have fostered a creative environment that encourages innovation and the development of new technologies.

Conclusion

Keiichiro Doi's contributions to semiconductor technology and his innovative patents demonstrate his significant impact on the industry. His work continues to inspire advancements in electronic devices, solidifying his reputation as a leading inventor in his field.