Hidekuni Ishida

Title: Innovations of Hidekuni Ishida

Introduction

Hidekuni Ishida is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of five patents. His work primarily focuses on the manufacturing processes of bipolar transistors, which are essential components in various electronic devices.

Latest Patents

Ishida's latest patents include a method of manufacturing a bipolar transistor. This method involves forming an N type collector layer in an N type semiconductor wafer, along with a P type base layer that contacts the N type collector layer at a PN junction extending to the surface. The P type base layer contains an N type impurity material with a high energy of combination with vacancies, as well as boron, which serves as a P type impurity material. Additionally, an N type emitter layer is formed, surrounded by the P type base layer, creating a transistor with the N type collector layer and the P type base layer. The N type impurity materials used include phosphorus and arsenic, with arsenic or antimony diffused in the P type base layer.

Another significant patent is for an NPN transistor with a base double doped with arsenic and boron. This semiconductor device also features an N type collector layer formed in an N type semiconductor wafer, a P type base layer in contact with the N type collector layer, and an N type emitter layer. The design and materials used are similar to those in his previous patent, emphasizing the innovative approaches Ishida has taken in semiconductor manufacturing.

Career Highlights

Throughout his career, Hidekuni Ishida has worked with prominent companies in the technology sector, including Tokyo Shibaura Electric Co., Ltd. and Toshiba Corporation. His experience in these organizations has allowed him to develop and refine his expertise in semiconductor technology.

Collaborations

Ishida has collaborated with notable colleagues such as Toshio Yonezawa and Kouichi Takahashi. These partnerships have contributed to the advancement of his research and the successful development of his patents.

Conclusion

Hidekuni Ishida's contributions to semiconductor technology through his innovative patents have significantly impacted the field. His work continues to influence the development of electronic devices, showcasing the importance of innovation in technology.