US Patent Issued to HOYA on June 9 for "Method for producing ring-shaped object, film-forming device, ring-shaped object, and hard disk drive device" (Japanese, Thai Inventors)

ALEXANDRIA, Va., June 9 -- United States Patent no. 12,649,687, issued on June 9, was assigned to HOYA Corp. (Tokyo).

"Method for producing ring-shaped object, film-forming device, ring-shaped object, and hard disk drive device" was invented by Masafumi Miura (Chaing Mai Province, Thailand) and Kazuaki Hashimoto (Akiruno, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing a ring-shaped object includes: placing a ring-shaped substrate on a plate; and spraying a gas containing a coating raw material toward a center hole of the ring-shaped substrate from above the ring-shaped substrate placed on the plate to cause the ring-shaped substrate to float up from the plate and form a film on a...