Location History:
- Yuki, JP (2004)
- Ibaraki, JP (1985 - 2014)
Company Filing History:
Years Active: 1985-2014
Title: Sumiko Nakajima: Innovator in Surface Treatment and Plating Technologies
Introduction
Sumiko Nakajima is a prominent inventor based in Ibaraki, Japan. She has made significant contributions to the field of surface treatment and plating technologies, holding three patents to her name. Her work focuses on enhancing the bonding strength of copper surfaces and improving electroless gold plating solutions.
Latest Patents
One of her latest patents is a method for surface treatment of copper. The objective of this invention is to provide a copper surface treatment method that maintains a strong bonding strength between a copper surface and a resist or insulating resin, without creating irregularities larger than 1 µm on the copper surface. The method involves three steps: forming a nobler metal on the copper surface, oxidizing the copper surface to create copper oxide, and then dissolving the copper oxide to form irregularities on the copper surface.
Another notable patent is for an electroless gold plating solution and method. This invention aims to provide a plating solution that requires a reduced amount of a reducing agent while maintaining a sufficient deposition rate and excellent stability. The solution comprises a gold salt, a phenyl compound-based reducing agent, and a water-soluble amine, along with a method for plating using this solution.
Career Highlights
Sumiko Nakajima is currently employed at Hitachi Chemical Company, Ltd., where she continues to innovate in her field. Her work has been instrumental in advancing technologies related to surface treatments and plating processes.
Collaborations
She has collaborated with notable coworkers, including Akishi Nakaso and Toshiro Okamura, contributing to various projects and innovations within her company.
Conclusion
Sumiko Nakajima's contributions to surface treatment and plating technologies have made her a significant figure in her field. Her innovative patents reflect her commitment to advancing technology and improving industrial processes.