Invention Grant
- Patent Title: Features for write fringing reduction
- Patent Title (中): 写入边缘缩小功能
-
Application No.: US13914990Application Date: 2013-06-11
-
Publication No.: US08830631B2Publication Date: 2014-09-09
- Inventor: Mourad Benakli , Michael Mallary
- Applicant: Seagate Technology LLC
- Applicant Address: US CA Cupertino
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Cupertino
- Agency: Hollingsworth Davis, LLC
- Main IPC: G11B5/667
- IPC: G11B5/667 ; G11B5/82 ; G11B5/855

Abstract:
A recording media design having discrete track recording structure where the trenches between tracks are filled with a soft magnetic material is provided. The soft magnetic material provides a low magnetic impedance path to the soft underlayer such that fringe fields from the write head are conducted to the soft underlayer without having a negative effect such as adjacent track erasure. A method of manufacturing the media includes a nano-imprint step and ion milling out the data layer to create the trenches. A B2O3 material allows the data layer to be ion milled out without redeposition bridging the B2O3 layer thus preventing lift off of the mask. The trenches are then filled by ion deposition with the layers of ferromagnetic material separated by an anti-ferromagnetic coupling that causes the flux to be conducted to the soft underlayer and remnant flux to rotate within the island and not into adjacent tracks.
Public/Granted literature
- US20130271873A1 MEDIA DESIGN FOR HIGH TPI FOR WRITE FRINGING REDUCTION Public/Granted day:2013-10-17
Information query
IPC分类: