Norboru Yamada

Title: **Norboru Yamada: A Pioneer in Reversible Optical Information Recording**

Introduction

Norboru Yamada, an accomplished inventor based in Hiraka, Japan, is known for his significant contribution to the field of optical information recording. His remarkable invention—a reversible optical information-recording medium—focuses on a phase-change type technology that allows for recording, reproducing, erasing, and rewriting of information using a laser beam.

Latest Patents

Norboru Yamada holds a patent for his innovative creation, titled "Reversible Optical Information-Recording Medium." This invention utilizes a recording thin film composed of ternary elements, such as germanium (Ge), tellurium (Te), antimony (Sb), or bismuth (Bi). Additionally, it includes quaternary elements, integrating selenium (Se) with a portion of tellurium. The patent emphasizes the importance of establishing stable compounds of stoichiometric compositions, specifically GeTe, SbTe, BiTe, GeSe, SbSe, or BiSe, on flat substrates like glass or plastics. This structured approach leads to high crystallization speeds and extended cyclability for recording and erasing.

Career Highlights

Yamada's professional journey is marked by his employment at Matsushita Electric Industrial Co., Ltd, a company recognized for its multifaceted innovations. His work there has fortified the company's reputation in the electronics sector, particularly in optical data storage technologies. His innovation stands out, contributing to the evolution of data storage methods and demonstrating his expertise in material science and engineering.

Collaborations

Throughout his career, Norboru Yamada has collaborated with fellow inventors Kunio Kimura and Masatoshi Takao. Their collective efforts have driven advancements in the fields of optics and materials, showcasing the value of teamwork and cooperative innovation in achieving groundbreaking inventions.

Conclusion

Norboru Yamada's contributions to the realm of reversible optical information recording have significantly impacted the data storage industry. His invention not only enhances the efficiency of recording and erasing information but also paves the way for future developments in optical technologies. Yamada's work exemplifies the spirit of innovation, making him a notable figure in contemporary invention history.