US Patent Issued to Headway Technologies on June 3 for "Spin injection assisted magnetic recording" (California Inventor)

ALEXANDRIA, Va., June 4 -- United States Patent no. 12,322,419, issued on June 3, was assigned to Headway Technologies Inc. (Milpitas, Calif.).

"Spin injection assisted magnetic recording" was invented by Yan Wu (Cupertino, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A spin injection assisted magnetic recording structure is disclosed wherein a ferromagnetic (FM) layer and at least one spin preservation (SP) layer are formed between a main pole (MP) trailing side and a write shield (WS). Current (Ia) flows between the MP and WS, or is injected into the FM layer. As a result, the spin polarized electrons from the FM layer, which flow across one or two SP layers to generate a magnetization that enhanc...