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Thin Film Magnetic Recording Head with Rough Air Bearing Surface Made by Thin Film Processes

IP.com Disclosure Number: IPCOM000115003D
Original Publication Date: 1995-Feb-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Harako, F: AUTHOR [+3]

Abstract

Described is a Thin Film Magnetic Recording Head with thin film on the Air Bearing Surface (ABS) which has more than 5nm (Peak to Valley) roughness. This type of Slider makes it possible to use the smooth disk without stiction force increase, and it improves Soft Error Rate (SER) due to the texture noise reduction.

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Thin Film Magnetic Recording Head with Rough Air Bearing Surface
Made by Thin Film Processes

      Described is a Thin Film Magnetic Recording Head with thin film
on the Air Bearing Surface (ABS) which has more than 5nm (Peak to
Valley) roughness.  This type of Slider makes it possible to use the
smooth disk without stiction force increase, and it improves Soft
Error Rate (SER) due to the texture noise reduction.

      Fig. 1 shows a example of this type of slider.  The rough ABS
has a same effect as disk texture.  And not to make the rough thin
film near the gap position, it is possible to make the Gap FH lower
for the texture height as shown in Fig. 2.

The advantages to compare with mechanical texture are as follows:
  1.  It is easy to control the roughness height.
  2.  To mask near the gap position is easier than mechanical
texture.

      The problem of mechanical textured sliders is a head disk
interfacial reliability due to a step near trailing edge.  And the
stress near the Gap position becomes much higher during the landing.
But the case using the Thin Film process, gap position does not
contact with disk when Head flying w/ low pitch angle or landing as
shown in Fig. 3.