Location History:
- Shukumachi Tosu Saga, JP (2008)
- Tosu, JP (1991 - 2010)
Company Filing History:
7 out of 1,714 
2 out of 1,037 
1 out of 1,432 
Years Active: 1991-2010
Title: Hiroshi Tateyama: Innovator in Wurtzite Thin Films and Piezoelectric Devices
Introduction
Hiroshi Tateyama is a prominent inventor based in Tosu, Japan, known for his significant contributions to the field of materials science. With a total of 10 patents to his name, he has made remarkable advancements in the development of wurtzite thin films and piezoelectric devices. His innovative work has implications for various applications in electronics and materials engineering.
Latest Patents
One of his latest patents involves the manufacturing of a wurtzite thin film, which is created through a reactive sputtering process using a metal material as a target along with nitrogen or oxygen gas as a reactive gas. By optimizing the film-forming conditions, he has achieved a wurtzite thin film with uniformly aligned polarization directions of crystal grains. Additionally, he has developed a laminate that includes a first wurtzite crystalline layer, which enhances the crystallinity and orientation of a second wurtzite crystalline layer on a functional material layer.
Another notable patent focuses on a piezoelectric element and its manufacturing method. In this process, a lower electrode is formed on a silica glass or stainless substrate. A thin film of aluminum nitride and/or zinc oxide is then deposited through sputtering, achieving a dipole orientation of 55% or more. This results in a piezoelectric thin film that retains its characteristics even at high temperatures, making it suitable for various applications.
Career Highlights
Hiroshi Tateyama has worked with esteemed organizations such as the National Institute of Advanced Industrial Science and Technology and the Agency of Industrial Science and Technology. His experience in these institutions has allowed him to collaborate on cutting-edge research and development projects, furthering the field of materials science.
Collaborations
Throughout his career, Hiroshi has collaborated with notable colleagues, including Morito Akiyama and Naohiro Ueno. These partnerships have contributed to the advancement of his research and the successful development of innovative technologies.
Conclusion
Hiroshi Tateyama's contributions to the field of wurtzite thin films and piezoelectric devices highlight his role as a leading inventor in materials science. His patents and collaborative efforts continue to influence advancements in technology and engineering.