Mutsuo Takenaga

Title: Mutsuo Takenaga: Innovator in Optical Recording Technology

Introduction

Mutsuo Takenaga is a notable inventor based in Katano-shi, Osaka-fu, Japan. He has made significant contributions to the field of optical recording technology, holding two patents that showcase his innovative approach to information storage.

Latest Patents

Takenaga's latest patents include an optical recording medium and a method of optical recording and erasing. This invention focuses on an optical recording member that features a thin film photosensitive layer on a base. The layer can transition between low and high optical density states when exposed to optical energy. It contains a first element, which may be a metal or semimetal, and a second element selected from a range of materials, including Te, Ge, Sn, and others. The invention also specifies the bonding of part of the oxygen element with the first element to form its oxide, adhering to a specific atomic ratio. The thin film is created using vacuum deposition or sputtering methods, allowing for the recording and erasing of information through light irradiation.

Another significant patent is for an optical information recording medium comprising a substrate and a photosensitive thin layer made of Te, O, and Pd. This layer can undergo a phase change when exposed to optical energy, altering its optical transmittance. The inclusion of Pd enhances the response time considerably, making this medium highly effective for optical information storage.

Career Highlights

Mutsuo Takenaga has dedicated his career to advancing optical recording technologies. His innovative patents reflect his commitment to improving the efficiency and effectiveness of information storage methods. His work has positioned him as a key figure in the field of optical recording.

Collaborations

Takenaga has collaborated with notable colleagues, including Noboru Yamada and Kenichi Nishiuchi. These partnerships have contributed to the development and refinement of his inventions, fostering a collaborative environment for innovation.

Conclusion

Mutsuo Takenaga's contributions to optical recording technology demonstrate his expertise and innovative spirit. His patents not only advance the field but also pave the way for future developments in information storage.