Perpendicular recording medium with oxide gradient layer

US10460755B2 · kind B2 · utility

Assignee

• Seagate Technology LLC · US

Inventors

• Pengcheng Li · Fremont, US
• Bin Lu · Pittsburgh, US
• Thomas P. Nolan · Fremont, US
• Li-Lien Lee · San Jose, US
• Jai-Young Kim · Seojong-myeon, KR

Key dates

• Filing date: Oct 16, 2013
• Grant date: Oct 29, 2019
• Expiry date: Sep 14, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W4/021
• WIPO field: IT methods for management
• WIPO sector: Electrical engineering

Abstract

Apparatus for recording data and method for making the same. In accordance with some embodiments, a recording layer is supported by a substrate. The recording layer has a granular magnetic recording layer with a first oxide content, a continuous magnetic recording layer with nominally no oxide content, and an oxide gradient layer disposed between the respective granular magnetic recording layer and the continuous magnetic recording layer. The oxide gradient layer has a second oxide content less than the first oxide content of the granular layer.