Kazuo Sumiyoshi

Kazuo Sumiyoshi is a notable inventor based in Oita, Japan. He has made significant contributions to the field of epoxy resin technology, holding 2 patents that showcase his innovative approach to materials used in electronic applications.

Latest Patents

Sumiyoshi's latest patents include a method for producing encapsulated semiconductors from improved epoxy. This patent describes an epoxy resin composition that comprises a novolak type epoxy resin produced from a substituted-phenol novolak and epihalohydrin. The composition is characterized by a maximum absorbance of 0.15 or less in a 3% (W/V) dichloromethane solution, measured at a specific infrared spectrophotometer wavelength. This innovation is particularly useful in encapsulating and laminating applications within the electronic field. Another significant patent is for unsaturated epoxy ester resin, which is prepared through a complex reaction involving various compounds, resulting in improved curability for applications in the industry.

Career Highlights

Kazuo Sumiyoshi is associated with Sumitomo Chemical Company, Limited, where he has been able to apply his expertise in epoxy resin technology. His work has contributed to advancements in materials that are essential for modern electronics.

Collaborations

Throughout his career, Sumiyoshi has collaborated with notable colleagues, including Hisao Takagishi and Makoto Nakahara. These collaborations have fostered a productive environment for innovation and development in their field.

Conclusion

Kazuo Sumiyoshi's contributions to epoxy resin technology have made a significant impact on the electronics industry. His innovative patents reflect his dedication to advancing material science, and his work continues to influence future developments in this area.