Location History:
- Kawasaki, JP (2015)
- Kanagawa, JP (2016)
- Kofu, JP (2006 - 2019)
Company Filing History:
5 out of 336 
5 out of 7,525 
3 out of 3,781 
Years Active: 2006-2019
Title: The Innovations of Koji Fujishima
Introduction
Koji Fujishima is a prominent inventor based in Kofu, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of eight patents. His work focuses on enhancing the efficiency and functionality of semiconductor devices.
Latest Patents
Fujishima's latest patents include a semiconductor device and a method of manufacturing the same. This semiconductor device features multiple electrode pads arranged in an active region of a semiconductor chip. The design incorporates wiring layers beneath the electrode pads, ensuring uniform occupation rates of wirings across different layers. To achieve this, dummy wirings are added in regions with lower occupation rates, while slits are formed in areas with higher rates to control the wiring density.
Another notable patent is for a power semiconductor device that includes gate electrode coupling portions for etchant control. This device features a laminated structure with a barrier metal film and a thick aluminum electrode film over the gate electrodes. The design addresses the issue of voids that can form during the etching process, which may compromise the integrity of the active cell region. By protruding the gate electrodes outward and covering the coupling portions with a metal electrode, the device enhances performance and reliability.
Career Highlights
Throughout his career, Koji Fujishima has worked with notable companies such as Hitachi ULSI Systems Co., Ltd. and Renesas Electronics Corporation. His experience in these organizations has allowed him to develop innovative solutions in semiconductor technology.
Collaborations
Fujishima has collaborated with esteemed colleagues, including Taku Kanaoka and Masashi Sahara. Their combined expertise has contributed to advancements in the semiconductor field.
Conclusion
Koji Fujishima's contributions to semiconductor technology through his patents and collaborations highlight his role as a leading inventor in the industry. His innovative designs continue to influence the development of efficient semiconductor devices.