Location History:
- Kanagawa, JP (1984 - 1985)
- Yokohama, JP (1986 - 1987)
- Kawasaki, JP (1991)
Company Filing History:
4 out of 4,819 
1 out of 11 
1 out of 1 
Years Active: 1984-1991
Title: Hiromu Haruki: Innovator in Semiconductor Technology
Introduction
Hiromu Haruki is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 5 patents. His work focuses on improving the efficiency and performance of electronic components.
Latest Patents
One of Haruki's latest patents is a "Gate turn-off thyristor with resistance layers." This invention involves a gate turn-off thyristor that features multiple segments, each with a four-layer pnpn structure. A resistance layer is placed between the emitter layer and the cathode electrode of each segment. This design helps to prevent current concentration in specific segments during the turn-off process, thereby improving the current flow in the remaining segments. The voltage drop across the resistance layer also aids in shunting the anode current, allowing for a more uniform current distribution and significantly increasing the controllable on-state current.
Another significant patent is the "Method for gettering heavy metal from a silicon plate." This invention describes a process where a single crystal silicon plate, contaminated with heavy metal impurities, is coated with a layer of amorphous silicon in a vacuum vessel. The coating is achieved through glow discharge at controlled pressure and temperature. The method effectively getter heavy metal impurities when the plate is heated above the crystallization temperature of the amorphous silicon layer.
Career Highlights
Throughout his career, Haruki has worked with prominent companies such as Fuji Electric Co., Ltd. and Fuji Electric Corporate Research & Development Co., Ltd. His experience in these organizations has allowed him to develop innovative solutions in semiconductor technology.
Collaborations
Haruki has collaborated with notable coworkers, including Masaharu Nishiura and Yoshiyuki Uchida. Their combined expertise has contributed to advancements in their respective fields.
Conclusion
Hiromu Haruki's contributions to semiconductor technology through his patents and collaborations highlight his role as an influential inventor. His innovative approaches continue to impact the industry positively.