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:
Sep. 08, 2026
Filed:
Jun. 25, 2024
Western Digital Technologies, Inc., San Jose, CA (US);
Yung-Hung Wang, San Jose, CA (US);
Ming Mao, Dublin, CA (US);
James Mac Freitag, Sunnyvale, CA (US);
Chih-Ching Hu, Pleasanton, CA (US);
Chen-Jung Chien, Mountain View, CA (US);
Yuankai Zheng, Fremont, CA (US);
Alexander M. Zeltser, San Jose, CA (US);
Fang Chen, Livermore, CA (US);
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
The present disclosure generally relates to a two dimensional magnetic recording (TDMR) read head. The read head comprises a lower shield, a lower sensor disposed on the lower shield, a middle shield disposed over the lower sensor, an upper sensor disposed on the middle shield, and an upper shield disposed over the upper sensor. In one embodiment, the middle shield is a simple pinned shield comprising a first ferromagnetic (FM) layer, an antiferromagnetic (AFM) layer disposed on the first FM layer, and a second FM layer disposed on the AFM layer, and the upper shield is a synthetic antiferromagnetic (SAF) pinned shield comprising a first pinned layer, an antiferromagnetic coupling (AFC) layer, such as Ru, disposed on the first pinned layer, and a second pinned layer disposed on the AFC layer. In another embodiment, the middle shield is a SAF pinned shield and the upper shield is a simple pinned shield.