Location History:
- Fuchu, JA (1977)
- Kodaira, JP (1981 - 1982)
- Higashimurayama, JP (1999)
- Takasaki, JP (1992 - 2005)
Company Filing History:
14 out of 42,508 
3 out of 2,861 
2 out of 3,781 
Years Active: 1977-2005
Title: **Inventor Masahiro Yamamura: A Pioneer in Semiconductor Technology**
Introduction
Masahiro Yamamura is an esteemed inventor based in Takasaki, Japan, with an impressive portfolio of innovations in the realm of semiconductor technology. With a total of 16 patents to his name, his work has significantly advanced the field, particularly in the development of semiconductor memory devices.
Latest Patents
Among his latest inventions, Yamamura has developed a semiconductor memory device designed to prevent the invasion of minority carriers from the semiconductor substrate into various components of the device. This innovative design can apply to SRAM or DRAM memory types and features a memory array alongside a peripheral circuit on the substrate. One notable aspect of this invention is the inclusion of a buried layer, which has the same conductivity type as the substrate but a higher impurity concentration, positioned beneath crucial components to act as a protective shield. Furthermore, the invention incorporates first and second carrier-absorbing areas strategically placed to mitigate the effects of minority carrier intrusion. The patent also outlines the use of isolation regions with unequal voltage applications, enhancing the device's operational efficiency.
Career Highlights
Throughout his career, Masahiro Yamamura has made significant contributions while working for leading companies such as Hitachi, Ltd. and Pioneer Electronic Corporation. His extensive experience at these renowned firms has provided a strong foundation for his innovative endeavors and has enabled him to focus on developing advanced technologies in the semiconductor industry.
Collaborations
Yamamura's journey in innovation has been enriched by collaborations with talented colleagues like Hideaki Uchida and Yutaka Kobayashi. These partnerships have fostered an environment of shared knowledge and creative synergy, further pushing the boundaries of semiconductor technology.
Conclusion
Masahiro Yamamura's contributions to semiconductor memory technology are noteworthy and reflect his dedication to innovation. With a portfolio that continues to expand, he remains a key figure in the field, inspiring future generations of inventors and engineers in Japan and beyond. His work exemplifies how persistent innovation can lead to significant advancements in technology, ultimately benefiting various industries worldwide.