Company Filing History:
8 out of 42,496 
2 out of 7,525 
1 out of 1,641 
Years Active: 1988-2014
Title: Hiroaki Okudaira: Innovator in Lead-Free Solder Technology
Introduction
Hiroaki Okudaira, an accomplished inventor based in Yokohama, Japan, is known for his significant contributions to the field of electronic materials and bonding technologies. With a total of 11 patents to his name, Okudaira has focused on developing innovative solutions that improve the performance and reliability of electronic devices, particularly through advancements in lead-free solder technology.
Latest Patents
Among Okudaira's most notable inventions are his latest patents regarding Pb-free solder-connected structures. These inventions offer a bonded structure created with lead-free solder, which includes an electronic article containing this bonded structure. His innovative approach ensures a stable bonding interface over time, providing sufficient strength and resistance to whisker formation, all while maintaining excellent wettability of the solder. The patented design applies a lead-free Sn—Ag—Bi alloy solder to an electrode through an Sn—Bi alloy layer, with a composition of 1 to 20 wt % Bi to secure optimal wettability. To achieve higher reliability and bonding strength, a copper layer is strategically placed beneath the Sn—Bi alloy layer.
Career Highlights
Throughout his career, Okudaira has made a mark by working with industry leaders such as Hitachi, Ltd. and Renesas Electronics Corporation. His work at these companies has greatly influenced the advancement of electronic connectivity and material science.
Collaborations
Hiroaki Okudaira has collaborated with several esteemed colleagues, including Hanae Shimokawa and Tasao Soga. These collaborations have fostered an environment of innovation and have led to the successful development of new technologies in electronic materials.
Conclusion
Hiroaki Okudaira's relentless pursuit of innovation in lead-free solder technology has made a profound impact within the electronics industry. His patents continue to enhance the reliability and performance of electronic devices, marking him as a leading figure among inventors dedicated to advancing technology for the modern world.