Unisys Corporation

Maxtor Corporation

Western Digital Corporation

Raju S Ananth

Michael A Verdone

Frank Ivan Morris

Adolf L Fick

A debris barrier surrounds a transducer for preventing microscopic debris from migrating near the magnetic poles of the transducer in a disk drive. In one embodiment, the debris barrier is composed of a barrier wall and a barrier cavity and used with a thin film transducer. The barrier elements are disposed within a region of an air bearing surface surrounding the poles of the transducer such that, during operation, debris is collected within and around the barrier thereby preventing the debris from migrating to the pole region. By eliminating debris around the transducer poles, this invention eliminates errors caused by the debris and thereby provides a more reliable disk drive. In another embodiment, the debris barrier is used with multiple transducers. In yet another embodiment, the debris barrier is used with a planar structure transducer having planar poles.

Slider having a debris barrier surrounding a transducer

Salient embodiments comprise magnetic recording sliders whose record-confronting face is characterized by two or three rails wherein stiction forces are counter-acted by provision of 'boss means' on one or several rails, or therebetween; and also characterized by provision of 'back-bar means' and associated purge channel means; and methods for rendering such are also described.

Slider for inhibiting stiction and with backbar

Slider for inhibiting stiction

Salient embodiments comprise a magnetic recording slider whose record-confronting face is characterized by two or three rails wherein stiction forces are counter-acted by provision of piezo-electric boss means on one or several rails, or therebetween.

Techniques for providing slider with boss

Methods for providing back bar and boss for slider

A disk drive having a hermetically sealed disk chamber capable of being filled with gas at pressures above ambient pressure with a specially designed connector assembly for use with the sealed chamber. Helium or nitrogen is injected into the sealed disk chamber. To decrease power consumption at high platter spin rates, the present invention advantageously utilizes a sealed disk chamber filled with helium to reduce tribological resistance forces associated with the surfaces of the spinning platters. Nitrogen is used to reduce oxidation of the disk platters. Special fixtures maintaining high position tolerance and connectors are designed to coupled the PC board controller of the disk drive unit to the components of the disk drive within the sealed disk chamber to eliminate connecting flexcircuits from the junction of the hermetically sealed chamber.

Method of manufacturing a hermetically sealed disk drive

Salient embodiments comprise magnetic recording sliders whose record-confronting face is characterized by two or three rails wherein stiction forces are counter-acted by provision of a 'boss' on one or several rails, or therebetween; and also characterized by provision of a 'back-bar' and associated a purge channel; and methods for rendering such are also described.

Techique for providing back bar and boss for slider

A method of adapting a magnetic recording slider having a shallow 'flying cavity' on its media-confronting face to exhibit 'self-purging', better stability and increased stiffness, this method including: providing a back bar across the trailing face of the cavity, with a purge channel in the back-bar to purge the cavity of gas and associated contaminants.

Method of adapting slider to include back-bar

Salient embodiments comprise a magnetic recording slider whose record-confronting face is characterized by two or three rails wherein stiction forces are counteracted by provision of piezo-electric boss means on one or several rails, or therebetween.

Growing community of inventors

San Jose, CA, United States of America

Raju S Ananth