This inventor holds 62 USPTO granted patents and 10 published patent applications and 1 EPO patent, primarily in Semiconductor Memory (CPC class H01L). Top assignees: Kabushiki Kaisha Toshiba, Infineon Technologies Ag, Toshiba Memory Corporation. Active years: 1989-2020.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Inventors with similar research interests:
Location History:
- Takatsu-ku, Kawasaki-shi, JP (1996)
- State College, PA (US) (1998 - 1999)
- Kawasaki, JP (1992 - 2006)
- Kanagawa, JP (2006)
- Tokyo, JP (1989 - 2016)
- Yokkaichi Mie, JP (2016 - 2019)
- Mie, JP (2020)
Company Filing History:
56 out of 53,262 
8 out of 15,027 
3 out of 2,955 
Years Active: 1989-2020
Areas of Expertise:
Title: The Innovative Contributions of Koji Yamakawa in Semiconductor Technology
Introduction: Koji Yamakawa, based in Tokyo, Japan, is an esteemed inventor known for his remarkable contributions to semiconductor technology. With an impressive portfolio of 62 patents, Yamakawa has established himself as a leading figure in the realm of semiconductor memory devices.
Latest Patents: Among his notable inventions, Yamakawa's latest patents include advanced semiconductor memory devices. The first device features a first and second electrode positioned oppositely in a first direction, with a unique resistance change film situated between them. This film incorporates elements such as germanium, antimony, and tellurium, essential for its high performance. Additionally, a first layer is strategically placed on the resistance change film's side surface, comprising elements that optimize its functionality, paired with elements like nitrogen, carbon, boron, and oxygen. Another patent reveals a similar configuration, featuring a phase-change film that enhances memory capabilities. This design includes an insulating first film and a conductive second film made from carbon, providing significant improvements in efficiency and effectiveness.
Career Highlights: Throughout his career, Koji Yamakawa has collaborated with prestigious companies, including Kabushiki Kaisha Toshiba and Infineon Technologies AG. His work has been pivotal in developing cutting-edge semiconductor technologies that are at the forefront of innovation in the electronics sector.
Collaborations: Yamakawa has had the opportunity to work alongside notable colleagues such as Katsuaki Natori and Daisuke Ikeno. Their shared expertise has fostered an environment of creativity and innovation, leading to groundbreaking advancements in semiconductor devices.
Conclusion: Koji Yamakawa's contributions to the field of semiconductor technology through his numerous patents reflect his dedication to innovation and excellence. As technology continues to evolve, his work remains influential in shaping the future of memory devices, solidifying his legacy as a leading inventor in the industry.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile