Yoshio Tsuji

Title: Innovations of Yoshio Tsuji

Introduction

Yoshio Tsuji is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of substrate inspection and circuit board testing. With a total of three patents to his name, Tsuji's work has advanced the technology used in electronic manufacturing.

Latest Patents

Tsuji's latest patents include a substrate inspection device and a substrate inspecting method. This innovative device utilizes a laser beam irradiation unit that directs a laser beam onto the top surface pattern of a wiring to be inspected. The intensity of the laser is sufficient to cause laser abrasion or two-photon absorption at the irradiated portion. A D.C. power supply applies a predetermined voltage between an electrode that traps electrons released from the top surface and a contact probe pressed against the bottom surface pattern of the wiring. This method allows for easy inspection of wirings for open and short circuits without direct contact with the lands of wirings on the substrate.

Another significant patent is a circuit-based testing apparatus and method for testing a circuit board. This apparatus includes an electromagnetic wave irradiator that discharges electrons from the first terminals of the wirings through the photoelectric effect. The discharged electrons are trapped by an electrode, which is electrically biased to a higher potential than the second terminals of the wirings. The existence of open-circuit and short-circuit conditions is determined based on the current flowing through the wirings.

Career Highlights

Yoshio Tsuji is currently employed at Nidec-Read Corporation, where he continues to innovate in the field of electronic testing and inspection. His work has been instrumental in improving the efficiency and accuracy of circuit board testing.

Collaborations

Tsuji has collaborated with notable colleagues such as Masayoshi Yamada and Masami Yamamoto. Their combined expertise has contributed to the development of advanced technologies in their field.

Conclusion

Yoshio Tsuji's contributions to substrate inspection and circuit board testing have made a significant impact on the electronics industry. His innovative patents reflect his dedication to advancing technology and improving manufacturing processes.