Invention Grant
- Patent Title: Method for AFC shields for multiple sensor magnetic transducers and magnetic transducers having multiple sensors and AFC shields
-
Application No.: US15219474Application Date: 2016-07-26
-
Publication No.: US09754613B2Publication Date: 2017-09-05
- Inventor: Rongfu Xiao , Shihai He , Daniele Mauri , Ming Mao , Shaoping Li
- Applicant: Western Digital (Fremont), LLC
- Applicant Address: US CA Fremont
- Assignee: Western Digital (Fremont), LLC
- Current Assignee: Western Digital (Fremont), LLC
- Current Assignee Address: US CA Fremont
- Agency: Foley & Lardner LLP
- Main IPC: G11B5/39
- IPC: G11B5/39 ; G11B5/11 ; G11B5/48 ; C21D6/00 ; C21D9/00 ; G11B5/31

Abstract:
A method and system provide a magnetic transducer having an air-bearing surface (ABS). The method includes providing a first shield, a first read sensor, an antiferromagnetically coupled (AFC) shield that includes an antiferromagnet, a second read sensor and a second shield. The read sensors are between the first and second shields. The AFC shield is between the read sensors. An optional anneal for the first shield is in a magnetic field at a first angle from the ABS. Anneals for the first and second read sensors are in magnetic fields in desired first and second read sensor bias directions. The AFC shield anneal is in a magnetic field at a third angle from the ABS. The second shield anneal is in a magnetic field at a fifth angle from the ABS. The fifth angle is selected based on a thickness and a desired AFC shield bias direction for the antiferromagnet.
Public/Granted literature
Information query
IPC分类: