Location History:
- Fukushima, JP (1993 - 1994)
- Shirakawa, JP (1993 - 1999)
- Fukushima-ken, JP (1997 - 2002)
Company Filing History:
14 out of 1,099 
1 out of 10 
1 out of 1 Years Active: 1993-2002
Title: Kohei Toyama: Innovator in Semiconductor Processing
Introduction
Kohei Toyama is a prominent inventor based in Shirakawa, Japan. He has made significant contributions to the field of semiconductor processing, holding a total of 15 patents. His work focuses on improving the quality and efficiency of semiconductor manufacturing processes.
Latest Patents
One of Toyama's latest patents is a method and apparatus for lapping or polishing semiconductor silicon single crystal wafers. This innovation aims to eliminate the transfer of waviness from wafers cut by wire saw apparatuses, thereby enhancing wafer quality. The method allows for automated lapping or polishing processes, facilitating single crystal processing from one cassette to another. It also increases workability and labor productivity by alternating a small amount of single-side lapping or polishing on both sides of the wafer to achieve the desired stock removal.
Another notable patent involves a system for reusing water-soluble slurry waste fluid. This system separates available abrasive grains and extracts water-soluble coolant for reuse. By effectively reusing these materials, the system reduces disposal costs and contributes to lowering the total slicing cost in semiconductor manufacturing.
Career Highlights
Throughout his career, Kohei Toyama has worked with leading companies in the semiconductor industry, including Shin-Etsu Handotai Co., Ltd. and Mimasu Semiconductor Industry Co., Ltd. His expertise and innovative approaches have made a significant impact on the efficiency and sustainability of semiconductor processing.
Collaborations
Toyama has collaborated with notable colleagues such as Etsuo Kiuchi and Kazuo Hayakawa. These partnerships have furthered advancements in semiconductor technology and have contributed to the success of various projects.
Conclusion
Kohei Toyama's contributions to semiconductor processing through his innovative patents and collaborations highlight his importance in the field. His work continues to influence the industry, paving the way for more efficient and sustainable manufacturing practices.