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. 05, 2018
Filed:
Nov. 21, 2016
Headway Technologies, Inc., Milpitas, CA (US);
Yue Liu, Fremont, CA (US);
Ying Liu, San Jose, CA (US);
Yuhui Tang, Milpitas, CA (US);
Jiun-Ting Lee, Sunnyvale, CA (US);
Moris Dovek, San Jose, CA (US);
Yiming Wang, San Jose, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A PMR writer is disclosed with an all wrap around (AWA) shield design in which one or more of the leading shield, side shields, and trailing shield (TS) structure (except the hot seed layer) at the air bearing surface (ABS) are comprised of an alloy having a damping parameter α of ≥0.04 to minimize wide area track erasure (WATE). The TS structure comprises two outer magnetic layers with an 8-16 kiloGauss (kG) saturation magnetic moment on each side of a center stack with a lower write gap, a middle hot seed layer having a 19-24 kG saturation magnetic moment, and an upper magnetic layer with a 16-24 kG saturation magnetic moment, and each having a first cross-track width. The hot seed layer, upper TS magnetic layer and an overlying PP3 trailing shield promote improved area density capability (ADC).