Kazuhiro Toyoda

Title: Kazuhiro Toyoda: Innovator in Semiconductor Memory Design

Introduction

Kazuhiro Toyoda is a renowned inventor based in Yokohama, Japan, with a significant contribution to the field of semiconductor technology. Holding 21 patents to his name, Toyoda's innovations have greatly influenced memory cell design and functionality.

Latest Patents

Among his latest patents, Toyoda has developed a **Bipolar Type Static Memory Cell**. This invention comprises two cross-connected circuits, each containing a transistor and a load element. The design utilizes an N-type epitaxial layer grown on an N.sup.+ -type buried layer, which serves as a collector region for the transistor. Additionally, a P-type layer and an N.sup.+ -type layer function as the transistor’s base and emitter regions, respectively. This innovative structure effectively eliminates parasitic diodes and unwanted charge storage effects, enhancing the memory cell's reliability.

Another significant patent is for a **Semiconductor Memory Device Having Pulse Width Control Circuit**. This device includes an address change detection circuit alongside a pulse width control circuit, which helps manage write enable signals. The pulse width control circuit inhibits signals with short pulse widths for a predetermined time during an address change, allowing for optimized write cycle times.

Career Highlights

Kazuhiro Toyoda has accumulated extensive experience working with leading technology companies. He has been associated with Fujitsu Corporation and Nippon Telegraph and Telephone Public Corporation. His work has paved the way for advancements in the semiconductor industry, particularly in memory technologies.

Collaborations

Throughout his career, Toyoda has collaborated with notable professionals, including Chikai Ono and Katuyuki Yamada. These partnerships have further fueled innovation and creativity in his projects, contributing to the successful development of his patents.

Conclusion

In summary, Kazuhiro Toyoda's innovative contributions to semiconductor memory design have had a profound impact on the industry. With 21 patents to his credit, his work continues to inspire future advancements in technology, solidifying his reputation as a leading inventor in the field.