Showa Denko/Resonac Assigned Patent

Showa Denko K.K./Resonac, Tokyo, Japan, has been assigned a patent (11587580) developed by Sueoka, Yoshihito, Itokazu, Koji, Seiki, Noriya, and Takasaki, Michitaka, Chiba, Japan, for a “magnetic storage apparatus.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A magnetic storage apparatus includes a disk-shaped magnetic recording medium, a motor which drives and rotates the magnetic recording medium, a magnetic head, including a first magnetic head element which reads information from the magnetic recording medium, and a second magnetic head element which writes information to the magnetic recording medium, and a bias circuit which supplies a predetermined bias voltage to the first magnetic head element. The magnetic recording medium has a laminated structure including a magnetic layer disposed above a substrate, and a carbon protective layer disposed above the magnetic layer. The bias circuit supplies to the first magnetic head element a voltage which is in a range of −0.2 V to −1.0 V with respect to a potential of the magnetic recording medium.”

The patent application was filed on 2022-04-08 (17/658475).