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:
May. 20, 2025
Filed:
Jul. 31, 2023
Western Digital Technologies, Inc., San Jose, CA (US);
Fang Chen, Livermore, CA (US);
Chih-Ching Hu, Pleasanton, CA (US);
Yung-Hung Wang, San Jose, CA (US);
Chen-Jung Chien, Mountain View, CA (US);
Ming Mao, Dublin, CA (US);
Ming Jiang, San Jose, CA (US);
Western Digital Technologies, Inc., San Jose, CA (US);
Abstract
The present disclosure generally relates to a dual free layer two dimensional magnetic recording read head. The read head comprises a first lower shield, a first sensor disposed over the first lower shield, a first upper shield disposed over the first sensor, a read separation gap (RSG) disposed on the first upper shield, a second lower shield disposed on the RSG, a second sensor disposed over the second lower shield, and a second upper shield disposed over the second sensor. In one embodiment, the RSG comprises SiOand has a thickness of about 7 nm to about 14 nm. The SiOisolates the first sensor from the second sensor, and is a chemical mechanical processing (CMP) stop layer. In another embodiment, the RSG comprises a first sublayer comprising AlOx and a second sublayer comprising SiO. The thicknesses of the first and second sublayers are based on an adjustable capacitance.