Location History:
- Katsuta, JP (1985 - 1989)
- Hitachinaka, JP (1997)
Company Filing History:
4 out of 42,508 
1 out of 7 Years Active: 1985-1997
Title: Hiroshi Itahana: Innovator in Semiconductor Technology
Introduction
Hiroshi Itahana is a notable inventor based in Katsuta, Japan, recognized for his contributions to semiconductor technology. With a total of four patents to his name, Itahana has made significant advancements in the field of electric power conversion and semiconductor devices.
Latest Patents
One of Itahana's latest patents is a "Free wheel diode arrangement for neutral point clamped electric power." This invention focuses on a neutral point clamped electric power conversion apparatus that utilizes four semiconductor switching elements connected in series. The design enhances the capacity of outer free wheel diodes, which are connected in reverse parallel with outer semiconductor switching elements, thereby minimizing the imbalance in losses between the inner and outer free wheel diodes.
Another significant patent is related to "Power semiconductors connected antiparallel via heatsinks." This semiconductor device features first and second semiconductor elements of different types that are stacked alternately. A series of cooling members are strategically placed between the paired semiconductor elements to facilitate cooling and electrical connection. This innovative design allows for a reduction in the size of the cooling members, as they only need to provide maximum cooling to one type of semiconductor element at a time.
Career Highlights
Hiroshi Itahana has had a distinguished career, working with prominent companies such as Hitachi, Ltd. and Hitachi Mito Engineering Co., Ltd. His experience in these organizations has contributed to his expertise in semiconductor technology and electric power systems.
Collaborations
Throughout his career, Itahana has collaborated with notable colleagues, including Yoshinori Usui and Akira Horie. These partnerships have likely fostered innovation and the exchange of ideas in the field of semiconductor technology.
Conclusion
Hiroshi Itahana's contributions to semiconductor technology through his patents and career achievements highlight his role as an influential inventor. His work continues to impact the industry, paving the way for future innovations in electric power conversion and semiconductor devices.