Location History:
- Inashiki, JP (1980)
- Ibaraki, JP (1986 - 1988)
- Ushiku, JP (1999)
Company Filing History:
Years Active: 1980-1999
Title: Tatsuji Sakamoto: Innovator in Laser Technology and Strain Sensing
Introduction
Tatsuji Sakamoto is a prominent inventor based in Ibaraki, Japan. He has made significant contributions to the fields of laser technology and strain sensing, holding a total of 4 patents. His innovative work has garnered attention in various industries, particularly through his latest patents.
Latest Patents
One of Sakamoto's latest inventions is a laser cleavage cutting method and system. This cutting system utilizes laser emission to cut a workpiece while relying on local cooling at the points where cutting begins and ends. The system can also provide cooling at the intersection of two cutting lines. By leveraging the difference in thermal stress between the laser beam's incidence point and the surrounding cooled area, an initial crack can be generated in a specified direction, allowing for the desired cutting line to be formed. In one embodiment, cooling is achieved using a low-temperature solid, such as a Peltier cooling plate, and the temperature of the workpiece near the laser beam's point of incidence can be determined through various measurement techniques.
Another notable invention is a piezoresistive strain sensing device. This device consists of a semiconductor single-crystal substrate with crystal indices in the (100) phase, featuring p-type and n-type diffused resistors. The diffused resistance gauge is formed from these resistors, and temperature compensation means are integrated adjacent to the resistance gauge within the substrate.
Career Highlights
Sakamoto has been associated with Hitachi, Ltd., a leading company in technology and innovation. His work at Hitachi has allowed him to develop groundbreaking technologies that have practical applications in various fields.
Collaborations
Throughout his career, Sakamoto has collaborated with notable colleagues, including Akio Yasukawa and Takashi Matsumoto. These collaborations have contributed to the advancement of technology and innovation in their respective fields.
Conclusion
Tatsuji Sakamoto is a distinguished inventor whose work in laser technology and strain sensing has made a significant impact. His innovative patents and contributions to Hitachi, Ltd. highlight his role as a key figure in advancing technology.