Browse Prior Art Database

Using Gas Cluster Ion Smoothing for Better Corrosion Protection

IP.com Disclosure Number: IPCOM000016272D
Original Publication Date: 2002-Oct-19
Included in the Prior Art Database: 2003-Jun-21
Document File: 2 page(s) / 241K

Publishing Venue

IBM

Abstract

The Gas Cluster Ion Smoothing Process can be used to smooth the air bearing surface (ABS) of a slider including the entire head structure (poletips, alumina, etc.). As a result of this process, the scratches on the poletips and the sharp edges at interface of different materials are smoothed out. In addition, the roughness of all the materials decreases. All of these effects improve the carbon overcoat coverage of the poletips and sensor, which improves the corrosion protection of the magnetic recording head. Furthermore, cluster ion smoothing can clean contaminants from the ABS surface including contamination, which is impossible to be removed effectively by other techniques. In one experiment, unprocessed parts had an average Ra roughness of 1.0 nm while processed parts had an Ra of 0.6 nm. Below are pictures of a sample unprocessed and processed head: Processed: 1

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Using Gas Cluster Ion Smoothing for Better Corrosion Protection

The Gas Cluster Ion Smoothing Process can be used to smooth the air bearing surface (ABS) of a slider including the entire head structure (poletips, alumina, etc.). As a result of this process, the scratches on the poletips and the sharp edges at interface of different materials are smoothed out. In addition, the roughness of all the materials decreases. All of these effects improve the carbon overcoat coverage of the poletips and sensor, which improves the corrosion protection of the magnetic recording head. Furthermore, cluster ion smoothing can clean contaminants from the ABS surface including contamination, which is impossible to be removed effectively by other techniques.

In one experiment, unprocessed parts had an average Ra roughness of 1.0 nm while processed parts had an Ra of 0.6 nm. Below are pictures of a sample unprocessed and processed head:

Processed:

1

[This page contains 1 picture or other non-text object]

Page 2 of 2

Unprocessed:

2

[This page contains 1 picture or other non-text object]