Yoshihiro Ueno

Title: Innovative Contributions of Yoshihiro Ueno in Semiconductor Technology

Introduction

Yoshihiro Ueno, an esteemed inventor based in Yokohama, Japan, has made remarkable contributions to the field of semiconductor technology. With a total of three patents to his name, Ueno's work focuses on improving the manufacturing processes of semiconductor silicon wafers, which are crucial components in various electronic devices.

Latest Patents

Ueno's latest patent innovations include a process for producing semiconductor silicon wafers and a method for manufacturing semiconductor devices. The first patent outlines a process that enhances the intrinsic gettering effect while ensuring the top side of the silicon wafers remains free from faults. This process involves producing a silicon ingot, slicing it to obtain silicon wafers, and forming a polycrystalline silicon depositing film on one side. A heat treatment in an inert or reducing gas further discharges oxygen from the opposite side, which significantly improves the quality of the wafers.

The second patent details a manufacturing method for semiconductor devices that introduces a pre-oxidation process. This technique reduces micro-roughness without altering the construction or electric characteristics of the elements within the semiconductor device. The oxide layer is initially formed in an oxidization atmosphere comprising H₂O and germanium hydride (GeH₄), which helps reduce the softening temperature of silicon dioxide, thus minimizing surface micro-roughness.

Career Highlights

Yoshihiro Ueno is affiliated with Kabushiki Kaisha Toshiba, a leading company in innovative electronics and technology. His extensive work in semiconductor research and development showcases his dedication to advancing this vital industry. Ueno's inventions have become foundational to improving the performance and efficiency of semiconductor devices used in modern electronics.

Collaborations

In his professional journey, Ueno has collaborated with notable colleagues such as Shuichi Samata and Atsuko Kubota. Their collective expertise in semiconductor technology has contributed to groundbreaking innovations and has strengthened the impact of their work within the industry.

Conclusion

Yoshihiro Ueno stands out as a significant innovator in the semiconductor sector, with patents that not only address existing challenges but also pave the way for future advancements. His contributions exemplify the importance of continuous innovation in technology, ensuring that the electronic devices of tomorrow are more efficient and reliable. Ueno's work at Toshiba underscores the vital role of collaboration and expertise in driving the semiconductor field forward.