Dismiss
The InnovationQ application will be updated on Sunday, May 31st from 10am-noon ET. You may experience brief service interruptions during that time.
Browse Prior Art Database

Overcoat on Metallic Magnetic Disks

IP.com Disclosure Number: IPCOM000040520D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02

Publishing Venue

IBM

Related People

Authors:
Bandara, U Kempf, J Kraus, G Steiner, W [+details]

Abstract

The overcoat consists of a fluoropolymer, has pores and is wetted with perfluorinated lubricants. It is formed by plasma polymerization and subsequent plasma etching. In a plasma generator, magnetic disk 1 is cleaned by cautious plasma etching. On the cleaned surface, a fluorinated material is plasma deposited in a CF4/H2 atmosphere and polymerized. By appropriately tuning the process parameters, the properties of the deposited fluoropolymer 2 are adjusted such that its wear resistance is high and pores 3 are formed (Fig. 1). Then, fluoropolymer 2 is plasma etched in a CF4 atmosphere, decreasing the layer thickness and enlarging the pores (Fig. 2). The enlarged pores are used as reservoirs for lubricant 4 (Fig. 3).