Tatsuro Umeyama

Title: Innovations of Tatsuro Umeyama

Introduction

Tatsuro Umeyama is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of glass substrate manufacturing, particularly for information recording mediums. With a total of 4 patents to his name, Umeyama's work has advanced the technology used in various recording devices.

Latest Patents

Umeyama's latest patents include a method for manufacturing a glass substrate for information recording mediums. This method is advantageous as it suppresses the oozing of alkali and deformation of texture. The glass substrate is chemically reinforced, and a texture is formed in the glass substrate, which is then treated with a neutral or alkaline aqueous solution. In the texture forming step, the surface of the glass substrate is etched to a depth of 0.5 to 10 nm. Another patent involves a method for manufacturing a disk-like glass substrate that is acid resistant. The acid resistance is represented by the maximum depth of 0.5 nm to 10 nm, which indicates the depth at which components other than silica dissolve during immersion in sulfuric acid. A linear texture is formed by pressing a tape against the glass substrate while feeding abrasion slurry to its surface, followed by acid treatment.

Career Highlights

Throughout his career, Tatsuro Umeyama has worked with prominent companies such as Hoya Corporation and Nippon Sheet Glass Company, Limited. His experience in these organizations has contributed to his expertise in glass substrate technology.

Collaborations

Umeyama has collaborated with notable coworkers, including Yasuhiro Saito and Kazuishi Mitani. Their combined efforts have furthered advancements in the field of glass substrates.

Conclusion

Tatsuro Umeyama's innovative work in glass substrate manufacturing has led to significant advancements in information recording mediums. His contributions continue to influence the industry and pave the way for future innovations.