Yoshihiro Ishigami

Title: Yoshihiro Ishigami: Innovator in Photocathode Technology

Introduction

Yoshihiro Ishigami is a prominent inventor based in Hamamatsu, Japan. He has made significant contributions to the field of photocathode technology, holding a total of 3 patents. His work focuses on innovative materials and methods that enhance the performance of electron tubes and semiconductor photocathodes.

Latest Patents

Ishigami's latest patents include a transmissive photocathode and an electron tube. This invention features a light transmitting substrate with a photoelectric conversion layer that efficiently converts light into photoelectrons. The design incorporates a light transmitting conductive layer made of single-layered graphene and a thermal stress alleviation layer that optimizes performance by managing thermal expansion.

Another notable patent is for a semiconductor photocathode and its manufacturing method. This invention includes an AlGaN layer bonded to a glass substrate, with an alkali-metal-containing layer formed on top. The structure is designed to enhance the efficiency of the photocathode by utilizing a semiconductor superlattice structure that varies in composition.

Career Highlights

Throughout his career, Ishigami has worked with notable companies such as Hamamatsu Photonics K.K. and Sanken Electric Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative technologies in the field of photocathodes.

Collaborations

Ishigami has collaborated with esteemed colleagues, including Yasumasa Hamana and Shunro Fuke. Their combined expertise has contributed to advancements in photocathode technology and has fostered a collaborative environment for innovation.

Conclusion

Yoshihiro Ishigami is a key figure in the development of photocathode technology, with a focus on enhancing the efficiency and performance of electronic devices. His contributions through patents and collaborations continue to influence the field significantly.