Kiyohiko Tsutsumi

Title: Kiyohiko Tsutsumi: Innovator in Imaging Technology

Introduction

Kiyohiko Tsutsumi is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of imaging technology, holding a total of 2 patents. His work focuses on the development of advanced imaging devices and photoelectric conversion elements.

Latest Patents

Tsutsumi's latest patents include an imaging device, a method for fabricating an imaging device, and an imaging apparatus. According to the invention, the imaging device comprises a plurality of photoelectric conversion elements arranged above a substrate, along with a read-out portion that reads out signals corresponding to charges generated by each element. Each photoelectric conversion element features a first electrode for charge collection, a second electrode opposite the first, a photoelectric conversion layer, and an electron blocking layer. The distance between the first electrodes of adjacent elements is 250 nm or smaller. Additionally, the electron blocking layers exhibit a change in surface potential of -1 to 3 eV from one face to the other.

Another patent focuses on a photoelectric conversion element that includes a pair of electrodes and an organic photoelectric conversion layer situated between them. One electrode collects electrons, while the other collects holes. This element also incorporates a hole blocking layer made of silicon oxide, which prevents hole injection into the organic layer while a bias voltage is applied. The oxygen/silicon composition ratio of the silicon oxide is maintained between 0.5 and 1.2.

Career Highlights

Kiyohiko Tsutsumi is currently employed at Fujifilm Corporation, where he continues to innovate in the field of imaging technology. His work has contributed to advancements in solid-state image pickup devices and manufacturing methods for photoelectric conversion elements.

Collaborations

Tsutsumi has collaborated with notable coworkers, including Yoshiki Maehara and Takashi Komiyama, who have also contributed to the field of imaging technology.

Conclusion

Kiyohiko Tsutsumi's innovative work in imaging technology and his contributions to the development of advanced photoelectric conversion elements highlight his importance as an inventor in this field. His patents reflect a commitment to enhancing imaging devices, which can have significant implications for various applications.