Company Filing History:
2 out of 3 
1 out of 10,326 
Years Active: 2015-2020
Title: Yasuhiro Umetsu: Innovator in Quartz Glass Technology
Introduction
Yasuhiro Umetsu is a notable inventor based in Yamagata, Japan. He has made significant contributions to the field of quartz glass technology, holding 2 patents that showcase his innovative approach to product management and refurbishment methods.
Latest Patents
One of his latest patents is titled "Product provided with management information." This invention focuses on creating a transparent product that can reliably transmit management information. Even in harsh environments, the indicated management information will not peel off. The management information is embedded within the product, allowing it to be visually recognized through at least one surface in the thickness direction.
Another significant patent is "Method of refurbishing a quartz glass component." This method addresses the refurbishment of quartz glass components that have been contaminated and eroded due to continuous use in plasma process apparatuses for semiconductor manufacturing. The process involves removing surface deposits using a cleaning method tailored to the contamination status. After cleaning, the component is inspected for residual deposits using light of a predetermined wavelength to induce a fluorescence effect. The eroded portions are then restored through flame treatment and precision machining, enhancing the mechanical strength and productivity of the quartz glass component.
Career Highlights
Yasuhiro Umetsu has worked with prominent companies in the industry, including Techno Quartz Inc. and Tokyo Electron Limited. His experience in these organizations has allowed him to develop and refine his innovative techniques in quartz glass technology.
Collaborations
Some of his notable coworkers include Masahide Kato and Katsutoshi Hoshino. Their collaboration has contributed to the advancement of technology in their respective fields.
Conclusion
Yasuhiro Umetsu's contributions to quartz glass technology through his patents and career experiences highlight his role as an innovator in the industry. His work continues to influence the efficiency and effectiveness of semiconductor manufacturing processes.