Composite lubricant for hard disk media

US7998912B2 · kind B2 · utility

Assignee

• WD MEDIA, LLC · US

Inventors

• Shaun H. Chen · Cupertino, US
• Yasuo Sakane · San Jose, US
• Henry S. Nishihira · San Jose, US
• Chi Kong Kwok · Fremont, US
• The V. Tran · San Jose, US
• Bing-Shiuan Chang · San Jose, US

Key dates

• Filing date: Sep 14, 2009
• Grant date: Aug 16, 2011
• Expiry date: Sep 14, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2080/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A composite lubricant for recording disk media, a recording disk media including a layer of the composite lubricant, and method of manufacturing the same are described. The composite lubricant may include a non-phosphazene component and a phosphazene component where the non-phosphazene component is a difunctional perfluoropolyether compound terminated with first and second polar end groups, the first polar end group comprising a first number of hydroxyls and the second polar end includes a second number of hydroxyls, greater than the first number of hydroxyls. The phosphazene component may be a difunctional perfluoropolyether compound terminated with a phosphazene functional group and with a third polar end group, the third polar end group comprising a third number of hydroxyls equal to the second number of hydroxyls.