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Magnetic recording slider with thermal control of the ABS shape for adjustable flying height

IP.com Disclosure Number: IPCOM000100678D
Publication Date: 2005-Mar-16
Document File: 4 page(s) / 55K

Publishing Venue

The IP.com Prior Art Database

Abstract

Magnetic recording slider with thermal control of the ABS shape for adjustable flying height

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  Magnetic recording slider with thermal control of the ABS shape for adjustable flying height

Magnetic recording slider in the hard disk drive 'flies' above the thin-film magnetic disk at the separation of just a few nanometers. Newer generations of the products will require the slider to fly even lower.

Unfortunately, the mass production of these sliders introduces small variations into the slider geometry, gram-load, static pitch/roll, etc., which results in large fluctuations in the slider's flying heigh and, therefore, magnetic spacing.

As the result of this fluctuations, some sliders fly higher, some lower, which is not acceptible from the viewpoint of magnetic performance and drive reliability. The sliders that deviate from their 'expected' behaviour by too much must be rejected, which affects the slider manufacturing yields.

Proposed is a magnetic recording slider with active thermal control of the ABS shape in 3D (three dimensions).

This slider design is required to achieve dynamic flying height control on every slider and to increase the yields by adjusting the geometry of every slider individually.

The slider has a heating element on the top side, which is micro-fabricated and is an integral part of the slider.

The shape of the heating element is such that it allows for the independent control of the slider geometry features, such as ABS crown, ABS twist, ABS roll, etc. which translates into the active control of the flying height, magnetic spacing, and allows for active damping of the slider vibration in real time.

The known solutions to this problem provide for the slider-disk clearance control in one direction (vertical) and are limited in application. This idea provides for the complete control over the slider geometry, which improves slider fabrication yields, and can be used to acti...