Company Filing History:
Years Active: 1986-1988
Title: Innovations of Takehiro Ohta
Introduction
Takehiro Ohta is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of semiconductor technology, holding two patents that showcase his innovative spirit and technical expertise.
Latest Patents
One of Ohta's latest patents is a gate turn-off thyristor. This invention features a semiconductor substrate shaped like a disc, which includes a first main surface and a second main surface. The substrate consists of an emitter layer on the cathode side, a second base layer, a first base layer, and an emitter layer on the anode side, all laminated in a specific order. The design incorporates a short-circuiting layer on the anode side, enhancing the device's functionality. The emitter layers on the cathode side are in contact with the cathode electrodes, while the second base layer connects to the control electrode.
Another significant patent is a power semiconductor device. This device includes a semiconductor region with a high impurity concentration exposed to one major surface of a semiconductor pellet. It features a main electrode that makes low ohmic contact with the semiconductor region and includes a bonding pad area for lead connection. The design aims to prevent cathode/gate short circuits and current concentration during operation.
Career Highlights
Takehiro Ohta is currently employed at Hitachi, Ltd., where he continues to develop innovative semiconductor technologies. His work has contributed to advancements in power semiconductor devices, which are crucial for various electronic applications.
Collaborations
Ohta has collaborated with notable colleagues, including Shuroku Sakurada and Hitoshi Matsuzaki. Their combined expertise has fostered a productive environment for innovation within their field.
Conclusion
Takehiro Ohta's contributions to semiconductor technology through his patents reflect his dedication to innovation and excellence. His work at Hitachi, Ltd. continues to influence the industry positively.
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.