Location History:
- Hitachiohta, JP (1987)
- Hitachioota, JP (1987 - 2002)
- Hitachiota, JP (1988 - 2002)
Company Filing History:
19 out of 42,485 
5 out of 152 Years Active: 1987-2002
Title: Hirohisa Yamamura: A Pioneer in Semiconductor and Power Inverter Innovations
Introduction
Hirohisa Yamamura, an innovative inventor based in Hitachioota, Japan, has made significant contributions to the fields of semiconductor technology and power inverters. With a portfolio of 19 patents to his name, his work has substantially impacted modern electronic designs, enhancing the performance and reliability of devices we rely on every day.
Latest Patents
Yamamura's latest patents showcase his inventive prowess in thermal management and semiconductor durability. One of the notable inventions is a power inverter featuring a heat sink designed with a cooling channel and strategically positioned openings. This design incorporates a first seal outside each opening and a groove outside the seal, facilitating better cooling efficiency through discretely formed holes that lead to the exterior of the cooling case. Additionally, his semiconductor device prevents fatigue failure of the solder layer beneath the semiconductor chip by incorporating a recess in the base under the chip, mitigating thermal expansion issues during operation.
Career Highlights
Throughout his career, Hirohisa Yamamura has been associated with renowned companies such as Hitachi, Ltd. and Hitachi Automotive Engineering Co., Ltd. His work at these institutions has been instrumental in advancing technologies that are essential for energy efficiency and semiconductor reliability. His commitment to innovation has not only propelled his career but has also contributed to the technological landscape.
Collaborations
Yamamura has had the opportunity to collaborate with esteemed professionals in the field, including Osamu Suzuki and Akio Yasukawa. This collaborative spirit has fostered an environment where creativity and innovation thrive, resulting in groundbreaking advancements in their respective areas.
Conclusion
Hirohisa Yamamura stands out as a visionary inventor whose contributions significantly benefit both the semiconductor industry and power inverter technology. With his extensive patent portfolio and collaborative efforts, he continues to pave the way for innovative solutions that impact technological development worldwide. As the field evolves, Yamamura's inventions serve as a testament to the power of ingenuity in addressing contemporary challenges in electronics.
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.