This inventor holds 2 USPTO granted patents and 1 published patent application. Top assignees: Showa Aluminum Corporation, Showa Denko K.k.. Active years: 2001-2002.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2001-2002
Title: Kazuyoshi Nishizawa: Innovator in Magnetic Disk Substrates
Introduction
Kazuyoshi Nishizawa is a notable inventor based in Tochigi, Japan. He has made significant contributions to the field of magnetic disk substrates, holding a total of 2 patents. His innovative methods have advanced the production processes and materials used in this technology.
Latest Patents
Nishizawa's latest patents include a method for producing magnetic disk substrates. This method involves several steps, including degreasing, etching, sensitization with tin chloride, activation, and sensitivity-enhancing treatment. The process also requires plating the pretreated substrates with a nickel/phosphorus film and polishing the plated substrates. Notably, the substrates are washed with hot pure water at a temperature of not lower than 50°C for a period of 20 to 90 seconds after the sensitization step but before the activation step. Additionally, they are heated at a temperature of not lower than 70°C for a period of 5 to 100 minutes after the sensitization step but before the nickel/phosphorus-plating step.
Another patent focuses on a magnetic disk substrate that utilizes glass with high hardness instead of aluminum. This innovation results in a small-sized magnetic disk substrate that can withstand impacts during transport and avoids damage, even when used in modern note- or mobile-type computers. The substrate features a nickel/phosphorus coating with a film thickness of 8 µm-20 µm or less on crystallized glass, which is polished to a depth of 3 µm or more.
Career Highlights
Throughout his career, Kazuyoshi Nishizawa has worked with prominent companies such as Showa Denko K.K. and Showa Aluminum Corporation. His experience in these organizations has contributed to his expertise in the field of magnetic disk technology.
Collaborations
Nishizawa has collaborated with notable coworkers, including Kurata Awaya and Kiyoshi Tada. Their combined efforts have furthered advancements in the technology surrounding magnetic disk substrates.
Conclusion
Kazuyoshi Nishizawa's contributions to the field of magnetic disk substrates demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to improving the durability and efficiency of magnetic storage solutions.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile