Company Filing History:
Years Active: 2020-2025
Title: Hiroyuki Hara: Innovator in Yttrium and Cr-Si Technologies
Introduction
Hiroyuki Hara is a notable inventor based in Ayase, Japan. He has made significant contributions to the field of materials science, particularly in the development of yttrium ingots and Cr—Si sintered bodies. With a total of 4 patents to his name, Hara's work is recognized for its innovative approaches to enhancing material properties.
Latest Patents
Hara's latest patents include advancements in yttrium ingots and sputtering targets. One of his key inventions is an yttrium ingot designed to produce a reduced number of particles when used as a sputtering target. This invention ensures high plasma resistance and low resistance, facilitating a high film deposition rate. The yttrium ingot features a fluorine atom content of less than or equal to 10 wt %, and when used as a target, it has a sputtering surface roughness of 10 nm or greater and 2 μm or less. Additionally, the yttrium ingot has a relative density of greater than or equal to 96% and fewer than or equal to 0.1 pores/cm with diameters greater than or equal to 100 μm.
Another significant patent involves a Cr—Si sintered body that contains both Cr and Si. This sintered body includes a crystalline CrSi phase and a crystalline Si phase, with the Si phase constituting 40% by mass or more. The relative density of the Cr—Si sintered body is 95% or more, and it has a total content of impurities of 200 ppm by mass or less, composed of elements such as Mn, Fe, Mg, Ca, Sr, and Ba.
Career Highlights
Hiroyuki Hara is currently employed at Tosoh Corporation, where he continues to innovate in the field of materials science. His work has not only advanced the understanding of yttrium and Cr—Si materials but has also contributed to their practical applications in various industries.
Collaborations
Hara collaborates with esteemed colleagues, including Masami Mesuda and Kenichi Itoh, who share his passion for innovation and research in materials science.
Conclusion
Hiroyuki Hara's contributions to the field of materials science,