Takeo Oku

Title: Takeo Oku: Innovator in Ohmic Electrode Technology

Introduction

Takeo Oku is a prominent inventor located in Kyoto, Japan, with a significant contribution to the field of semiconductor technology. He holds a total of 7 patents, showcasing his innovative approach to developing advanced materials and methods for ohmic electrodes, particularly for III-V compound semiconductors such as Gallium Arsenide (GaAs).

Latest Patents

Among his latest patents, "Ohmic electrode, its fabricating method and semiconductor device" focuses on creating an efficient ohmic electrode for GaAs semiconductors. This invention involves the use of a n.sup.+-type GaAs substrate and a n.sup.++-type regrown GaAs layer, where a NiGe film containing precipitates composed of α'-AuGa is sequentially stacked. The innovative fabrication process includes layering a Ni film, Au film, and Ge film on the substrate, then patterning these films, followed by annealing at temperatures between 400 to 750 degrees Celsius.

Another notable patent by Oku is the "Multi-layered structure for ohmic electrode fabrication," which presents a multi-layered approach to creating ohmic electrodes. This method involves depositing materials such as a non-single crystal InAs layer, Ni film, WSi film, and W film on an n.sup.+-type GaAs substrate, followed by a series of patterning and annealing steps. The effective combination of these materials aims to achieve satisfactory performance characteristics for the resulting ohmic electrodes.

Career Highlights

Takeo Oku has had a successful career working with notable companies in the electronics industry, including Sony Corporation and Sharp Kabushiki Kaisha Corporation. His experiences with these leading organizations have shaped his innovative mindset and technical expertise.

Collaborations

Throughout his career, Oku has collaborated with talented individuals, such as Masanori Murakami and Akira Otsuki. These professional relationships have contributed to the advancement of semiconductor technologies and have played a crucial role in bringing their joint inventions to fruition.

Conclusion

With his impressive portfolio of patents and dedication to innovation, Takeo Oku continues to make significant strides in the semiconductor field. His work on ohmic electrodes not only enhances the performance of III-V compound semiconductors but also showcases the potential for future innovations in this critical area of technology.