Koji Koyama

Title: Koji Koyama: Innovator in Diamond Polishing Techniques

Introduction

Koji Koyama is a prominent inventor based in Tokyo, Japan, recognized for his contributions to the field of diamond crystal polishing. With a total of seven patents to his name, Koyama has made significant strides in enhancing the quality and efficiency of diamond processing methods.

Latest Patents

Among his latest inventions, Koyama has developed two notable patents related to diamond crystals. The first patent titled "Method for Polishing Diamond Crystal" outlines a sophisticated process for refining diamond surfaces. This method includes preparing a diamond crystal with a (100) plane orientation and executing mechanical polishing using a specialized polishing wheel. By ensuring that the tangent direction at the contact position remains within ±10 degrees of a <110> direction, this technique effectively creates an affected region that aligns with the (111) plane orientation of the diamond. Following this, chemical mechanical polishing is carried out to remove the affected region, resulting in a high-quality polished diamond surface.

The second patent, simply titled "Diamond Crystal," describes the structure and characteristics of a bulk diamond crystal formed with dislocation concentration regions. This crystal is designed with an interval between these dislocation regions ranging from 10 nm to 4000 nm. The crystal's surface orientation can be any of (100), (111), or (110), while its external shape may be rectangular or circular, ensuring versatility in application.

Career Highlights

Koyama has showcased his innovative spirit through his collaborations with reputable companies such as Adamant Namiki Precision Jewel Co., Ltd. and Orbray Co., Ltd. His work has not only contributed to the development of advanced diamond polishing techniques but has also influenced the standards and practices in the diamond industry.

Collaborations

Throughout his career, Koyama has worked alongside notable individuals, including Seongwoo Kim and Hideo Aida. These collaborations have enabled the fusion of diverse expertise, further enhancing the evolution of diamond processing technologies.

Conclusion

Koji Koyama's dedication to innovation in diamond crystal polishing has established him as a key figure in the industry. His patents reflect a deep understanding of material science and engineering, paving the way for advancements that continue to influence diamond processing techniques worldwide. Through his innovative methods, Koyama not only enhances the quality of diamond products but also contributes to the broader field of material processing.