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Perfluoropolyether lubricant thin film for thin film storage medium

A technology of perfluoropolyether and magnetic recording medium, applied in the field of magnetic recording medium and lubricating oil, can solve the problems of weak anti-wear property and no molecular mobility of perfluorocarbon polymer

Inactive Publication Date: 2010-03-24
SEAGATE TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, highly cross-linked perfluorocarbon polymers have weak abrasion resistance because of their rigid chemical structure with little molecular mobility to moderate external shear stress

Method used

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  • Perfluoropolyether lubricant thin film for thin film storage medium
  • Perfluoropolyether lubricant thin film for thin film storage medium
  • Perfluoropolyether lubricant thin film for thin film storage medium

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Embodiment Construction

[0027] The present invention relates to a method of coating a substrate, in particular a recording medium (recording disk), with a solid lubricant, where lubricant is also specifically referred to as lube. Lubricants are typically liquids containing components with molecular weights ranging from a few hundred Daltons to several thousand Daltons.

[0028] In-house processing for the manufacture of magnetic recording media in image 3 is schematically shown in . The disk substrate is continuously moved from the heater to the sub-seed layer deposition station so that the sub-seed layer is formed on the disk substrate. The disk substrate then moves to a seed layer station to deposit a seed layer, typically NiAl. Following deposition of the sub-seed layer and seed layer, the disk substrate is transported through an underlayer deposition station where the underlayer is deposited. The disks are then transported to a magnetic layer deposition station, followed by a protective carbo...

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Abstract

The invention relates to a perfluoropolyether lubricant thin film for thin film storage medium, provides a method for producing magnetic recording medium, comprising:forming a magnetic recording layeron a substrate, forming a protective overcoat layer on the magnetic recording layer, exposing a surface of the protective overcoat layer to an atmosphere comprising a perfluorocycloalkane and oxygen,and depositing a perfluoropolyether-containing layer on the protective overcoat layer. The invention also provides a magnetic recording medium having a solid lubricant film layer which is deposited by plasma-enhanced chemical vapor deposition. The solid lubricant film comprises a perfluoropolyether, which is formed by the polymerization of a perfluorocycloalkane.

Description

Background technique [0001] Disks with magnetizable media are used for data storage in most computer systems. Current magnetic hard drives operate with read-write heads that are only a few nanometers above the surface of the disk at relatively high speeds (typically meters per second). As the read-write head contacts the disk surface during operation, a layer of lubricant is applied to the disk surface to reduce wear and friction. [0002] Figure 1(a) shows a cross-section of a disc recording medium and a magnetic disc, showing the difference between longitudinal and perpendicular recording. Although FIG. 1 shows only the non-magnetic disk side, the magnetic recording layer is sputter deposited on each side of the non-magnetic aluminum substrate of FIG. 1(a). Also, although Figure 1(a) shows an aluminum substrate, other embodiments may include glass, glass-ceramic, Nip / aluminum, metal alloys, plastic / polymer materials, ceramics, glass-polymers, composites Or other substrate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/84G11B5/85G11B5/725
CPCG11B5/725G11B5/8408C08G2650/48C08G65/007C08L71/02G11B5/7257
Inventor 刘建伟M·J·施蒂尼曼桂靖
Owner SEAGATE TECH LLC
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