Takeshi Fujiwara

Title: The Innovations of Takeshi Fujiwara

Introduction

Takeshi Fujiwara is a notable inventor based in Nara, Japan. He has made significant contributions to the field of technology, particularly in the areas of acoustic signal processing and wafer bonding. With a total of 6 patents to his name, Fujiwara's work reflects a deep understanding of engineering principles and innovative design.

Latest Patents

One of Fujiwara's latest patents is a propagation time measurement device. This device determines the propagation time of an acoustic signal through cross-correlation analysis between a transmission signal and a reception signal. The device generates the transmission signal to satisfy specific criteria, including a ratio of a height of a peak other than the maximum peak in an autocorrelation function of the transmission signal to the height of the maximum peak being 0.8 or less. Additionally, the duration of the transmission signal must be at least five times the shortest period of the transmission signal or at least 20 times the half width at half maximum of the autocorrelation function of the transmission signal.

Another significant patent is a method for bonding wafers and the structure of the bonding part. This method involves forming a first bonding part on a surface of a first wafer by stacking a diffusion preventing layer made of a material with low wettability with AuSn above the first wafer. A bonding layer is then formed on the surface of the diffusion preventing layer, ensuring that it stays back from the edge of the diffusion preventing layer. A second bonding part is formed on a surface of a second wafer, and the two bonding parts are bonded together by eutectic bonding with an AuSn solder under specific conditions.

Career Highlights

Fujiwara has worked with prominent companies such as Omron Corporation and Suncall Corporation. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.

Collaborations

Throughout his career, Fujiwara has collaborated with talented individuals, including Toshiaki Okuno and Katsuyuki Inoue. These collaborations have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Takeshi Fujiwara's contributions to the field of technology through his patents and collaborations highlight his innovative spirit and dedication to advancing engineering solutions. His work continues to influence the industry and inspire future inventors.