Kiyoshi Kojima

Title: Kiyoshi Kojima: Innovator in Silicon Carbide Technology

Introduction

Kiyoshi Kojima is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of silicon carbide (SiC) technology, particularly in the production of high-quality SiC seed crystals and substrates. With a total of 4 patents, his work has the potential to advance various applications in electronics and materials science.

Latest Patents

Kojima's latest patents include a method for producing a SiC seed crystal for growth of a SiC ingot by heat-treating in a main container made of a SiC material. This innovative method aims to achieve high-quality SiC seed crystals, ingots, wafers, and wafers with epitaxial films. The process involves heat-treating a SiC single crystal in an atmosphere containing silicon and carbon elements, which helps to suppress strain and crystal defects.

Another notable patent is a method for producing a SiC substrate via an etching step, growth step, and peeling step. This method addresses the challenges in SiC substrate production by incorporating an etching step to prepare the SiC base substrate, a crystal growth step to grow a SiC substrate layer, and a peeling step to produce the final SiC substrate. The method is characterized by arranging the SiC base substrate and SiC materials to face each other and heating them to create a temperature gradient.

Career Highlights

Throughout his career, Kiyoshi Kojima has worked with esteemed organizations such as the Kwansei Gakuin Educational Foundation and Toyota Tsusho Corporation. His experience in these institutions has allowed him to refine his expertise in materials science and engineering.

Collaborations

Kojima has collaborated with notable individuals in his field, including Tadaaki Kaneko. These partnerships have contributed to the advancement of his research and innovations.

Conclusion

Kiyoshi Kojima's contributions to silicon carbide technology through his patents and career achievements highlight his role as an influential inventor. His innovative methods for producing SiC seed crystals and substrates are paving the way for advancements in various technological applications.