Location History:
- Hiratsuka, JP (2011)
- Ibaraki, JP (2016)
- Tsukuba, JP (2016 - 2017)
Company Filing History:
Years Active: 2011-2017
Title: Innovations by Hirofumi Nakagawa
Introduction: Hirofumi Nakagawa, an accomplished inventor based in Tsukuba, Japan, has made significant contributions to the field of chemical vapor deposition through his innovative work. With a total of five patents to his name, Nakagawa continues to push the boundaries of technology in material science.
Latest Patents: Two of Nakagawa's latest patents showcase his expertise in the production and purification of dodecacarbonyl triruthenium (DCR). The first patent, titled "Method for Purifying Dodecacarbonyl Triruthenium", addresses the need for a purification method that yields DCR as a high-quality raw material. This method ensures minimal contamination of thin films with impurities during the formation of ruthenium thin films. By maintaining the dissolved oxygen concentration in the solvent at 0.2 mg/L or less during the dissolution stage, the process effectively separates trace impurities from DCR. Additionally, the purification method is versatile enough for recovering DCR after its use.
The second patent, titled "Device for Producing and Method for Producing Dodecacarbonyl Triruthenium", presents a groundbreaking approach to the efficient sublimation of crude DCR. This method involves heating crude DCR in a carbon monoxide-rich atmosphere (30 to 100%) before cooling it to precipitate pure DCR. This innovative technique enables a stable and abundant supply of DCR, vital for advanced chemical vapor deposition applications.
Career Highlights: Nakagawa's work is closely associated with Tanaka Kikinzoku Kogyo K.K., where he has significantly impacted the company's research and development initiatives. His dedication to innovation has led to advancements that not only enhance production efficiency but also improve the quality of chemical vapor deposition materials.
Collaborations: Throughout his career, Nakagawa has collaborated with notable colleagues, including Junichi Taniuchi and Masayuki Saito. Their collective efforts have fostered a collaborative environment conducive to pioneering new technologies in the field of material science.
Conclusion: In summary, Hirofumi Nakagawa's contributions to the development and purification of dodecacarbonyl triruthenium reflect his innovative spirit and commitment to advancing technology in chemical vapor deposition. Through his patents and collaborative work, Nakagawa continues to influence the industry, paving the way for future innovations.