Company Filing History:
1 out of 1,100 
1 out of 9 
1 out of 1,099 
Years Active: 1998
Title: The Innovative Contributions of Yuji Hirao
Introduction
Yuji Hirao, an accomplished inventor based in Kobe, Japan, has made significant strides in the field of semiconductor technology. With two patents to his name, Hirao's work focuses on enhancing the measurement and evaluation accuracy of semiconductor materials, addressing challenges in the industry.
Latest Patents
Two of Yuji Hirao's latest patents exemplify his innovative spirit. The first patent, titled "Method of and apparatus for determining residual damage to wafer edges," focuses on evaluating the edge portion of semiconductor wafers. This invention utilizes a non-destructive optical acoustical process, allowing for high accuracy in determining crystal damage without conventional destructive methods. The process involves measuring thermal responses induced by exciting laser beams on specified points of the wafer's inclined surfaces.
The second significant patent, titled "Method of and apparatus for measuring lifetime of carriers," employs a unique combination of microwave, excitation light, and bias light to measure the lifetime of carriers within a semiconductor sample. By passivating the surface of the sample with an electrolyte solution, Hirao's methodology suppresses surface recombination, facilitating high-accuracy measurements of carrier lifetimes.
Career Highlights
Throughout his career, Yuji Hirao has contributed to notable companies, including Kobe Seiko Sho and Genesis Technology Inc. His tenure in these organizations has allowed him to innovate and apply his theoretical knowledge to practical challenges within the semiconductor industry.
Collaborations
Yuji Hirao has collaborated with esteemed colleagues, including Shingo Sumie and Naoyuki Yoshida, showcasing his ability to work effectively within a team. These collaborations have played a crucial role in the development of his patented technologies and have contributed to advancements in semiconductor research.
Conclusion
In summary, Yuji Hirao's inventive contributions have significantly impacted the semiconductor industry. His patents demonstrate a commitment to innovation and an understanding of the intricate challenges faced in the field. As technology continues to evolve, Hirao's work will undoubtedly serve as a foundation for future advancements in semiconductor technology.