Wataru Kumagai

Title: Wataru Kumagai: Innovator in Aluminum Alloy Technologies

Introduction

Wataru Kumagai, an accomplished inventor based in Tokyo, Japan, has made significant contributions to the field of materials science, particularly focusing on aluminum alloys. With a total of six patents to his name, he has been instrumental in developing innovative products for magnetic disc applications.

Latest Patents

Among Wataru Kumagai's latest patents are breakthroughs in aluminum alloy substrates for magnetic discs. The first patent describes an aluminum alloy substrate characterized by specific compositions: it contains Fe (1.80 mass % or less), Mn (0.70 mass % or less), Ni (2.50 mass % or less), Si (2.50 mass % or less), Cu (1.00 mass % or less), Zn (0.48 mass % or less), and Mg (1.00 to 3.50 mass %). The total content of Fe, Mn, and Ni ranges from 1.60 to 4.50 mass %, and the mass ratio of Cu/Zn is between 0.01 to 0.35 or 6.00 to 50.00, with aluminum and inevitable impurities making up the balance. Another notable patent focuses on an aluminum alloy disc blank for magnetic discs, which contains Fe (ranging from 0.005 to 1.800 mass %) with the balance being aluminum and inevitable impurities. This patent ensures that the flatness change of the disc blank when held in the atmosphere at 50°C or lower for 336 hours is 2.0 μm or less.

Career Highlights

Wataru Kumagai has had an impressive career, gaining valuable experience working for esteemed companies such as Furukawa Electric Co., Ltd. and UACJ Corporation. His practical engagement in these organizations has enriched his understanding of the industry and has allowed him to apply his inventive talent effectively in real-world products.

Collaborations

Throughout his career, Wataru Kumagai has worked alongside notable colleagues, including Kotaro Kitawaki and Hideyuki Hatakeyama. Their collaboration reflects a shared commitment to innovation and advancement in materials science, particularly in the development of new technologies for magnetic storage.

Conclusion

In conclusion, Wataru Kumagai is a distinguished inventor whose contributions to the field of aluminum alloys have significantly impacted the industry. With multiple patents showcasing his innovative spirit, he continues to push the boundaries of technology in magnetic disc applications. His work not only represents individual excellence but also highlights the importance of collaboration in driving forward advancements in invention.