Location History:
- Hitachi, JP (1981)
- Ibaraki, JP (1988 - 1992)
- Naka, JP (1992)
- Tokai, JP (2007)
Company Filing History:
9 out of 42,485 
3 out of 162 
2 out of 14 Years Active: 1981-2007
Title: Tadaaki Kariya: Innovator in Semiconductor Technology
Introduction
Tadaaki Kariya is a prominent inventor based in Ibaraki, Japan, known for his significant contributions to semiconductor technology. With a total of 11 patents to his name, Kariya has made remarkable advancements in the field, particularly in the design and functionality of semiconductor devices.
Latest Patents
One of Kariya's latest patents involves a semiconductor device that features buffer layers with a coefficient of linear expansion ranging from 3×10−6/°C to 8×10−6/°C. These layers are joined to the upper and lower surfaces of a silicon chip using a Pb-free solder that has a thickness of no more than 0.05 mm and a melting point of at least 250°C. Additionally, the upper surface of the upper buffer layer and the lower surface of the lower buffer layer are connected to a lead and a base through Pb-free solders, which have a thickness of no less than 0.15 mm and a melting point of not less than 250°C. Another notable patent is a circuit designed for driving a capacitive load, such as an EL display panel. This circuit includes a first power source terminal, a second power source terminal, and an output terminal connected to the capacitive load. It features a source side thyristor and a sink side thyristor, which work together to supply and draw current from the load, respectively.
Career Highlights
Throughout his career, Tadaaki Kariya has worked with esteemed companies such as Hitachi, Ltd. and Hitachi Engineering Co., Ltd. His experience in these organizations has allowed him to develop innovative solutions that have had a lasting impact on the semiconductor industry.
Collaborations
Kariya has collaborated with notable colleagues, including Tatsuo Shimura and Mitsuhiko Okutsu. These partnerships have contributed to the advancement of technology in their respective fields.
Conclusion
Tadaaki Kariya's work in semiconductor technology exemplifies the spirit of innovation and dedication to advancing the field. His patents and collaborations reflect his commitment to improving electronic devices and systems.
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.