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:
Dec. 28, 2021
Filed:
Oct. 16, 2020
Sae Magnetics (H.k.) Ltd., Shatin, HK;
Headway Technologies, Inc., Milpitas, CA (US);
Qinghua Zeng, Fremont, CA (US);
Siu Yin Ngan, San Jose, CA (US);
Ellis Cha, San Ramon, CA (US);
Kowang Liu, Fremont, CA (US);
SAE Magnetics (H.K.) Ltd., Shatin, HK;
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A Perpendicular Magnetic Recording (PMR) head is configured for use in Thermally Assisted Magnetic Recording (TAMR). Two or three contiguous write shields, of various widths and thicknesses, formed on a leading edge side of the write gap (WG), main pole (MP) and near-field transducer (NFT), protect the head during write touchdowns (TD) and signal the approach of such a touchdown. Moreover during a write touchdown the contact with the head is restricted to the large write shields, producing a large touchdown area (TDA) and insuring the lifetime of the head.