Koji Yokosawa

Title: Koji Yokosawa: Innovator in Bendable Circuit Technology

Introduction

Koji Yokosawa is a prominent inventor based in Yonezawa, Japan. He is known for his innovative contributions to the field of electronics, particularly in the development of bendable and expandable circuit boards. His work has significant implications for the future of electronic devices, enhancing their flexibility and usability.

Latest Patents

Yokosawa holds a patent for a bendable circuit board, an expandable circuit board, and an electronic device made therefrom. This invention provides an expandable or bendable circuit board that offers a good body-contact feel and is resilient against bending and folding. The bendable circuit board features a film made from polyurethane, which is synthesized by reacting a long-chain polyol with polyisocyanate. This film has a storage modulus at 25°C of 20 to 200 MPa, a tensile strength of 20 to 80 MPa, and an elongation at break of 500 to 900%. The temperature at which the storage elastic modulus reaches 1 MPa is at 155°C or higher. Additionally, the circuit wiring is formed in contact with the surface of the film.

Career Highlights

Koji Yokosawa is currently employed at Mitsui Chemicals, Inc., where he continues to push the boundaries of electronic materials. His innovative approach has led to advancements in the design and functionality of circuit boards, making them more adaptable to various applications.

Collaborations

Yokosawa has collaborated with notable colleagues, including Tadahiro Sunaga and Jun Okabe. These partnerships have fostered a creative environment that encourages the exchange of ideas and the development of cutting-edge technologies.

Conclusion

Koji Yokosawa's contributions to the field of electronics, particularly through his patent for bendable circuit technology, highlight his role as an influential inventor. His work not only enhances the functionality of electronic devices but also paves the way for future innovations in the industry.