Location History:
- Hitachi, JP (1980 - 1987)
- Hitachiota, JP (1990)
Company Filing History:
Years Active: 1980-1990
Title: Innovations of Toshikatsu Shirasawa
Introduction
Toshikatsu Shirasawa is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of four patents. His work focuses on enhancing the performance and reliability of semiconductor devices.
Latest Patents
One of his latest patents is a semiconductor device that comprises a heavily doped semiconductor layer exposed to both principal surfaces of a semiconductor substrate. This device features a semiconductor element, such as a diode, bipolar transistor, or MOS transistor, formed on one principal surface side of the substrate. Additionally, it includes a resistor region connected in series with the semiconductor element on the other principal surface side, along with an electrode for current detection that maintains contact with the semiconductor layer. Another notable patent is for a semiconductor device with a field plate. This innovation involves field plates designed to relax electric fields for an active element in a semiconductor integrated circuit. The field plate is integral with an electrode making ohmic contact with an elongated strip-shaped diffusion region, extending beyond the pn-junction formed between the diffusion region and an adjacent region. This configuration allows for a high breakdown voltage without altering the size of the diffusion region.
Career Highlights
Toshikatsu Shirasawa has dedicated his career to advancing semiconductor technology at Hitachi, Ltd. His innovative designs and patents have contributed to the development of more efficient and reliable semiconductor devices, which are crucial in various electronic applications.
Collaborations
Throughout his career, Shirasawa has collaborated with notable colleagues, including Tomoyuki Tanaka and Masahiro Okamura. These collaborations have fostered a creative environment that has led to significant advancements in their field.
Conclusion
Toshikatsu Shirasawa's contributions to semiconductor technology through his patents and collaborations highlight his role as a key innovator in the industry. His work continues to influence the development of advanced electronic devices.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.