Tatsuo Shimura

Title: Innovations of Tatsuo Shimura

Introduction

Tatsuo Shimura is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of seven patents. His work has had a profound impact on the development of lateral-type semiconductor devices and semiconductor switching circuits.

Latest Patents

One of his latest patents is for a lateral-type semiconductor device. This device features a p-emitter layer and a p-collector layer formed on the exposed-surface side of an n-base layer. The design ensures that the exposed surfaces of the p-emitter layer and the n-base layer are substantially surrounded by the exposed surface of the p-collector layer. Additionally, the n-base layer connects to a base electrode or through a heavily-doped region extending from under the n-base region to an exposed surface area on the outer-periphery side of the p-collector layer.

Another significant patent involves a semiconductor switching circuit. In this circuit, a fraction of the current passing through the P-emitter region and N-base region of a thyristor is by-passed to the base-emitter junction of a PNP transistor. The base current is dependent on the thyristor current, allowing for efficient control of the circuit. As the anode current of the thyristor increases, the base current and collector current of the PNP transistor also increase, optimizing the performance of the device.

Career Highlights

Tatsuo Shimura has worked with prominent companies such as Hitachi, Ltd. and Hitachi Haramachi Semiconductor, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking innovations in semiconductor technology.

Collaborations

Throughout his career, Tatsuo has collaborated with esteemed colleagues, including Tadaaki Kariya and Shigeru Sugayama. These partnerships have fostered an environment of innovation and creativity, leading to advancements in their respective fields.

Conclusion

Tatsuo Shimura's contributions to semiconductor technology through his patents and collaborations highlight his importance as an inventor. His work continues to influence the industry and pave the way for future innovations.