Tetsu Negishi

Title: Tetsu Negishi: Innovator in Power Module Technology

Introduction

Tetsu Negishi is a prominent inventor based in Chiyoda-ku, Japan. He has made significant contributions to the field of power module technology, holding a total of six patents. His work focuses on enhancing the efficiency and reliability of power conversion devices.

Latest Patents

Negishi's latest patents include a power module and a power conversion device. The power module is designed to reduce thermal resistance between a semiconductor device and a base plate, thereby relieving stress at the joining portion. This innovative module consists of at least one semiconductor device, an insulating substrate with an insulating layer, a circuit layer on the upper surface, and a metal layer on the lower surface. Additionally, it features a sintering joining member that effectively connects the semiconductor device to the circuit layer.

Another notable invention is the 2-in-1 type chopper module. This module aims to suppress the reduction in temperature cycle life of wiring within the device. It includes a switching transistor, a first diode connected in inverse-parallel to the transistor, and a second diode connected in series. The design ensures that the power loss during forward current conduction is substantially identical for both the switching transistor and the first diode, while the effective area of the second diode is larger than that of the first.

Career Highlights

Tetsu Negishi is currently employed at Mitsubishi Electric Corporation, where he continues to innovate in the field of power electronics. His work has been instrumental in advancing technologies that improve energy efficiency and device performance.

Collaborations

Negishi has collaborated with notable colleagues such as Kei Yamamoto and Junichi Nakashima. Their combined expertise has contributed to the successful development of various innovative technologies in the power module sector.

Conclusion

Tetsu Negishi's contributions to power module technology exemplify his commitment to innovation and excellence. His patents reflect a deep understanding of the challenges in power conversion and a dedication to finding effective solutions.