Company Filing History:
4 out of 941 
1 out of 11 Years Active: 1998-2003
Title: David J Sellmyer: Innovator in Magnetic Recording Media
Introduction
David J Sellmyer is a prominent inventor based in Lincoln, NE (US). He has made significant contributions to the field of magnetic recording media, holding a total of 5 patents. His work focuses on enhancing the density and efficiency of magnetic recording materials, which are crucial for data storage technologies.
Latest Patents
One of Sellmyer's latest patents is for "Extremely high density magnetic recording media, with production methodology controlled longitudinal/perpendicular orientation, grain size and coercivity." This invention discloses a modulated grain-composition magnetic recording material capable of achieving terabit areal density recording capacity. The production process involves sequential vacuum deposition and annealing procedures that allow for selective fabrication of magnetic materials with desired grain size and coercivity. The preferred magnetic recording material consists of multiple layers of FePt/B O and/or Fe/Pt/B O, featuring a minimum grain size of approximately ten nanometers and coercivity of up to twelve K-Oe.
Another notable patent is for "High coercivity longitudinal recording media and method for its." This invention comprises FePt or similar thin films that are vacuum deposited by RF and DC sputtering. The multilayered films undergo vacuum annealing, resulting in the formation of ordered phases of FePt, which exhibit very high crystal anisotropy. The annealed FePt films possess large coercivity and fine grain size, making them suitable for ultra-high density magnetic recording media.
Career Highlights
David J Sellmyer has had a distinguished career, working at the University of Nebraska and the Board of Regents. His research has significantly advanced the understanding and development of magnetic materials, contributing to innovations in data storage technologies.
Collaborations
Throughout his career, Sellmyer has collaborated with notable colleagues, including Chun-Ping Luo and Peter A Dowben. These collaborations have further enriched his research and development efforts in the field of magnetic recording media.
Conclusion
David J Sellmyer is a key figure in the advancement of magnetic recording technologies. His innovative patents and contributions to the field have paved the way for future developments in data storage solutions.