Location History:
- Hitachi, JP (2003 - 2013)
- Kitaibaraki, JP (2004 - 2013)
Company Filing History:
15 out of 57 
5 out of 165 
1 out of 1 Years Active: 2003-2013
Title: The Innovative Contributions of Masashi Kumagai
Introduction: Masashi Kumagai is a prominent inventor hailing from Hitachi, Japan. With an impressive portfolio of 21 patents, his work primarily focuses on advancements in flexible substrates and electrolytic copper foils. His innovations are significant in the electronics and materials science industries.
Latest Patents: Among Kumagai's latest patents, two notable contributions stand out. The first is a "Two-layer flexible substrate," which provides a robust solution free of surface defects with excellent etching characteristics. This invention features a copper layer applied directly to an insulator film, avoiding the need for adhesives. The precise specifications include a surface roughness (Ra) ranging from 0.10 to 0.25 µm and an average crystal grain size of no more than 0.8 µm within 1 µm from the insulator film.
The second patent involves a novel method for producing electrolytic copper foil. This invention aims to create a low-profile foil with finely patterned attributes and excellent elongation and tensile strength, both at normal and elevated temperatures. The process utilizes a unique copper electrolytic solution that incorporates specific organosulfur and amine compounds to optimize performance.
Career Highlights: Masashi Kumagai has amassed substantial experience while working for notable companies, including Nikko Materials Company and Nippon Mining & Metals Co., Ltd. His career reflects a commitment to innovation and technological advancement in the materials sector.
Collaborations: Throughout his career, Kumagai has collaborated with talented individuals, including Katsuyuki Tsuchida and Mikio Hanafusa. These partnerships have contributed to the successful development of his patented technologies and furthered research in his field.
Conclusion: Masashi Kumagai's contributions through his 21 patents have significantly impacted the fields of flexible substrates and copper foil production. His innovative approaches and collaborations underscore the importance of creativity and technical expertise in driving advancements in material sciences. As his work continues to evolve, it promises to inspire future innovations in the industry.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.