Company Filing History:
Years Active: 1999-2007
Title: Yasunao Kai: Innovator in Composite Materials
Introduction
Yasunao Kai is a prominent inventor based in Fukuoka, Japan. He has made significant contributions to the field of composite materials, holding a total of 2 patents. His work focuses on developing innovative materials that enhance performance in various applications.
Latest Patents
One of Yasunao Kai's latest patents is for a high-density composite material. This composite comprises an elastomer or vulcanized rubber and particles of a high-density material, such as tungsten, evenly dispersed throughout. The composition includes 35 to 50 vol. % elastomer or vulcanized rubber and 50 to 65 vol. % high-density particles. The high-density particles consist of 60 to 80 vol. % coarse particles with a diameter of 10 to 100 µm, 10 to 20 vol. % medium particles with a diameter of 3 to 6 µm, and 10 to 20 vol. % fine particles with a diameter of 1 to 2 µm. This composite material is noted for its flexibility and processability, making it suitable for applications such as radiation-shielding sheets, weight members, vibration-damping materials, balancing members, radiating materials, and shot materials.
Another significant patent by Yasunao Kai involves a substrate and heat sink for semiconductors. This substrate efficiently radiates heat from a semiconductor element mounted on it. It consists of a composite alloy metal made from a sintered body of a high melting point metal powder, such as tungsten and molybdenum, which is impregnated with a filling metal like copper and silver. The sintered body features a grain size composition that combines multiple powder groups with statistically different average grain sizes, ensuring uniform dispersion.
Career Highlights
Yasunao Kai is currently employed at Nippon Tungsten Co., Ltd., where he continues to innovate in the field of materials science. His work has garnered attention for its practical applications and contributions to technology.
Collaborations
Yasunao has collaborated with notable coworkers, including Akira Mishima and Shinji Gotoh. Their combined expertise has further advanced the development of innovative materials.
Conclusion
Yasunao Kai's contributions to composite materials and semiconductor technology highlight his role as a leading inventor in his field. His patents reflect a