International Business Machines Corporation

Headway Technologies, Incorporated

Devendra S Chhabra

Sanford A Bolasna

Glen A Garfunkel

Moris Musa Dovek

Cherng-Chyi Han

Nobuyuki Kitazaki

Rod Lee

Michel P Robert

Sridhar Gopalakrishna

Grace Lim Gorman

Henry S Nishihira

Dien Le Van

Mor Dovek

A magnetic read/write head and slider assembly and method for forming said magnetic read/write head and slider assembly, wherein said assembly has improved heat spreading and dissipation properties and exhibits significantly reduced thermal protrusion during operation. The method of formation is simple and efficient, involving only the extension of one of the conductive mounting pads so that it is in thermal contact with a portion of the slider assembly surface that is over the read/write element.

Thermal protrusion reduction in magnet heads by utilizing a heat-spreading pad

A method of fabricating a magnetic read/write head and slider assembly, wherein the assembly has improved heat spreading and dissipation properties and the read/write head exhibits significantly reduced thermal protrusion during operation. The method of fabrication is simple and efficient, involving only the extension of at least one of the conductive mounting pads so that it is in thermal contact with a portion of the slider surface that is directly above the read/write element.

Method of manufacturing a magnetic read/write head and slider assembly

A magnetic read/write head and slider assembly and method for forming the magnetic read/write head and slider assembly, wherein the assembly has improved heat spreading and dissipation properties and exhibits significantly reduced thermal protrusion during operation. The method consists of the formation of a heat sink layer on a portion of either the upper pole yoke or the lower magnetic pole of the writer.

Thermal protrusion reduction in magnet heads by utilizing heat sink layers

A method of forming a waveguide comprising the following steps. A structure is provided. An underclad layer is formed over the structure and a core layer is formed over the underclad layer. Patterning: the core layer to form the waveguide; and partially into the underclad layer, forming an overetched underclad layer having a projection underneath the waveguide. The waveguide having stress gradients and the overetched underclad layer having stress gradients.

Method to produce stress-free optical waveguides to reduce stress-induced birefringence in planar lightwave circuit (PLC) devices

An improved negative pressure air bearing (NPAB) slider for rotating disk drives provides an easy means of controlling the slider characteristics including roll, pitch, fly height and skew sensitivity. The NPAB slider has positive pressure, negative pressure and transition regions whereby the shape of the regions determine the direction and amount of air flowing into the negative pressure region and thus the magnitude and distribution of negative pressure generated. The regions can be formed during a single etch to a single etch depth simplifying manufacturing. One embodiment includes a third rail located within the negative pressure region. Other embodiments include side rails with leading edge tapers or alternatively leading edge steps.

Adjustable negative pressure air bearing slider

Negative Pressure air bearing slider having transition region between

For a slider having convex curvature along its length, or 'crown', a method for reducing fly height variation due to crown by shifting the peak of the crown toward the leading end, and the resultant slider structure. In a preferred method, peak shifting is accomplished in a slider with symmetrical crown by affixing a suspension to the bonding surface of the slider near the leading end. The bonding process creates a displacement force upon the slider to effect the shift. An alternative approach reshapes a row of sliders prior to rail shaping, e.g., by sand or bead blasting.

Method of manufacturing a slider/suspension having an improved crown

An air bearing slider for use in carrying a transducer adjacent a recording medium exhibits reduced sensitivity to variations in roll, crown, and skew. In one embodiment, the slider comprises an air bearing slider having a pair of substantially coplanar side rails disposed along the sides of the air bearing surface so as to form a recessed section between the side rails. The recessed section is open at both the leading and trailing ends of the slider while each side rail has a tapered section or etched step at the leading edge of the slider. One rail carries the transducer and extends for the entire length of the slider body. The rail without a transducer extends from the leading edge toward the trailing edge, but does not extend all the way to the trailing edge. Under some skew, accessing, and crash stop impact conditions, the resulting slider roll causes the flying height of the inactive rail to drop. By proper selection of the length and width of the inactive rail, the roll is biased such that the fly height of the inactive rail remains higher than that of the active rail even under worst case conditions. Therefore, minimum slider to disk spacing is larger than it would be for a slider design in which all rails extend the entire length of the slider.

Roll insensitive air bearing slider

Slider having shifted crown peak for reduced fly height sensitivity

An air bearing slider for supporting a magnetic transducer comprising a pair of coplanar side rails on the sides of an air bearing surface of the slider and a center rail along the central region of the air bearing surface to form recessed areas between the rails which extend from the leading to the trailing end of the slider. All the rails have a tapered section at their leading ends. The side rails have a width that does not exceed the width of the side rails at the leading end, and the side rails extend only part way to the trailing end of the slider. The width of the center rail is small at the leading end and greatest at the trailing end of the slider, where the transducer is supported.

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San Jose, CA, United States of America

Devendra S Chhabra