This inventor holds 5 USPTO granted patents. Top assignees: Matsushita Electronics Corporation, Matsushita Electric Industrial Co., Ltd.. Active years: 1976-1999.
Location History:
- Muko, JA (1976)
- Muko, JP (1980 - 1981)
- Shiga, JP (1982 - 1999)
Company Filing History:
3 out of 655 
2 out of 27,375 
Years Active: 1976-1999
Title: Hiromitsu Takagi: Innovator in FET Technology
Introduction
Hiromitsu Takagi is a prominent inventor based in Shiga, Japan. He has made significant contributions to the field of field-effect transistors (FETs), holding a total of 5 patents. His work has been instrumental in advancing the technology used in high-power electronic devices.
Latest Patents
One of Takagi's latest patents is for a vertical insulated gate FET. This innovation involves creating an insulated gate FET, such as a power MOS FET, by forming a rectangular parallelepiped-shaped recess. The side walls of this recess are designed to make a 45-degree angle against the <100> direction of the silicon substrate, which has the (100) plane as its principal surface. The vertical side walls of the (010) or (001) planes are utilized as the channel region of the insulated gate FET. This design ensures a large electron mobility in the channel, resulting in low channel resistance that is suitable for high-power operation.
Another notable patent is a method of making an FET utilizing shadow masking and diffusion from a doped source. This novel self-align type method allows for the creation of an FET with a very short gate length, excellent high-frequency characteristics, and low noise characteristics. The method comprises several steps that enhance the performance of the FET.
Career Highlights
Throughout his career, Hiromitsu Takagi has worked with leading companies in the electronics industry, including Matsushita Electronics Corporation and Matsushita Electric Industrial Co., Ltd. His experience in these organizations has contributed to his expertise in FET technology and innovation.
Collaborations
Takagi has collaborated with notable colleagues such as Gota Kano and Iwao Teramoto. These partnerships have further enriched his work and have led to advancements in the field of electronics.
Conclusion
Hiromitsu Takagi's contributions to FET technology have made a significant impact on the electronics industry. His innovative patents and collaborations highlight his role as a leading inventor in this field.