Location History:
- Ibaraki, JP (2006)
- Tsukuba, JP (2003 - 2013)
Company Filing History:
5 out of 1,716 
1 out of 110 
1 out of 31 
Years Active: 2003-2025
Title: Naoki Shirakawa: Innovator in Sound Pressure Conversion Technology
Introduction
Naoki Shirakawa is a prominent inventor based in Tsukuba, Japan. He has made significant contributions to the field of sound pressure-electrical signal conversion technology. With a total of 9 patents to his name, Shirakawa's work showcases his innovative spirit and technical expertise.
Latest Patents
One of Shirakawa's latest patents is a sound pressure-electrical signal conversion device and conversion method. This invention features a sheet-shaped electrostatic device that is three-dimensionally deformable and operates at a low drive voltage. The device consists of a polymer sheet sandwiched between a pair of electrodes. The polymer sheet acts as a dielectric film, while at least one of the electrodes includes an insulating flexible substrate with multiple through-holes and conductive fibers. These fibers enable electrical conduction in the in-plane direction through contact, allowing the device to output an electrical signal when vibrated by sound pressure or an electrical signal.
Another notable patent is a thin film depositing method. This method involves supplying a gas with controlled water concentration and oxygen partial pressure into a reaction chamber. The process includes a dehydration and deoxidation phase, followed by the deposition of a metal film on a substrate. An insulating film is then formed on the wafer by oxidizing the metal film in a low-oxygen atmosphere.
Career Highlights
Shirakawa has worked at the National Institute of Advanced Industrial Science and Technology, where he has furthered his research and development efforts. His work has been instrumental in advancing technologies related to sound pressure conversion and thin film deposition.
Collaborations
Throughout his career, Shirakawa has collaborated with notable colleagues, including Shinichi Ikeda and Hiroshi Bando. These collaborations have contributed to the success of his innovative projects and patents.
Conclusion
Naoki Shirakawa's contributions to the field of sound pressure conversion technology highlight his role as a leading inventor. His innovative patents and career achievements reflect his dedication to advancing technology in this area.