The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 22, 2021
Filed:
Aug. 21, 2019
Headway Technologies, Inc., Milpitas, CA (US);
Yan Wu, Cupertino, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A spin torque reversal assisted magnetic recording (STRAMR) structure is disclosed wherein a spin torque oscillator (STO) is formed in the write gap (WG) and generates one or both of a radio frequency (RF) field on a magnetic bit to lower the required write field during a write process, and a spin torque on a field generation layer (FGL) in the STO that flips a FGL magnetization to a direction opposing the WG field thereby increasing reluctance in the WG and causing larger write field output from the main pole (MP). The FGL is between two spin preserving layers that each conduct spin polarized current from an adjoining spin polarization (SP) layer. Current is applied from the MP and trailing shield to the SP layers, and returns to a direct current source through a lead from the FGL. STO sidewalls are self-aligned to a MP tip upper portion.