Company Filing History:
Years Active: 1996-2002
Title: Kazumasa Doi: Innovator in Transparent Optical Devices
Introduction
Kazumasa Doi is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of optical devices, holding 2 patents that showcase his innovative approach to technology. His work primarily focuses on the development of transparent optical devices that enhance light manipulation.
Latest Patents
Kazumasa Doi's latest patents include a "Transparent Optical Device and Fabrication Method Thereof." This invention features a transparent medium designed to receive light, with a porous layer formed on its front side. The device may include a recessed surface area that defines a phase shift photomask. The transparent medium is typically made of synthesized silica, and the porous layer is created through reactive ion etching using halogenized hydrocarbon plasma. Another notable patent is the "Phase Shift Mask and Its Manufacturing Method," which outlines a process for creating a phase shift mask by protecting the side wall of an opening in a light-damping film and etching it to a halftone thickness.
Career Highlights
Kazumasa Doi is currently employed at Fujitsu Corporation, where he continues to push the boundaries of optical technology. His work has been instrumental in advancing the capabilities of optical devices, making them more efficient and effective in various applications.
Collaborations
Throughout his career, Kazumasa Doi has collaborated with notable colleagues, including Eiichi Hoshino and Masanori Onodera. These partnerships have contributed to the successful development of his innovative patents.
Conclusion
Kazumasa Doi's contributions to the field of transparent optical devices reflect his dedication to innovation and technology. His patents not only demonstrate his expertise but also pave the way for future advancements in optical engineering.