Company Filing History:
2 out of 4,814 
2 out of 2 Years Active: 1998-1999
Title: Takahiko Uematsu: Innovator in Electron Emitting Devices
Introduction
Takahiko Uematsu is a notable inventor based in Kawasaki, Japan. He has made significant contributions to the field of electron emitting devices, holding a total of 2 patents. His work focuses on advancing technologies that utilize field emission principles.
Latest Patents
Uematsu's latest patents include a field emission type electron emitting device and a method of producing it. In this invention, a comb-like or wedge-like electron emitting device is created where an emitter or both an emitter and an anode electrode are processed from a single-crystal silicon thin film of a silicon-on-insulator (SOI) wafer. The process involves removing the single-crystal silicon thin film in portions other than the processed area, allowing for the silicon oxide layer to be slightly dug down. A gate electrode is then provided in the dug-down portion to apply an electric field that draws electrons out of the emitter. The design ensures that when the end and side faces of the emitter are formed as (111) faces through anisotropic etching, the emitter achieves a sharp edge at approximately 55 degrees relative to the substrate. Additionally, in a conical electron emitting device, the gate electrode is formed from a single-crystal silicon thin film of an SOI wafer, creating a pyramid surrounded by the (111) faces on the single-crystal silicon substrate.
Career Highlights
Throughout his career, Uematsu has worked with prominent companies, including Fuji Electric Co., Ltd. His expertise and innovative approach have positioned him as a leader in the development of advanced electron emitting technologies.
Collaborations
Uematsu has collaborated with notable colleagues such as Junji Itoh and Yoichi Ryokai, contributing to the advancement of their shared field.
Conclusion
Takahiko Uematsu's contributions to the field of electron emitting devices highlight his innovative spirit and dedication to technological advancement. His patents reflect a deep understanding of materials and engineering principles, paving the way for future developments in this area.