International Business Machines Corporation

Pemstar, Inc.

Other

William W Brooks

Jerome Thomas Coffey

Donald John Wanek

Tzong-Shii Pan

Satya Prakash Arya

Randall George Simmons

Victor Wing Shum

Wesley LeRoy Hillman

John E Sell

Gary L Heitkamp

Jeffrey B Brown

Richard H Estry

John H Wirz

Walter E Zahn

Paul D Teig

Larry H Lengerman

Arvid C Tougas

Jeff B Brown

Marlin P Graves

Thomas J Myhre, Sr

Terrance L Schaefer

Robert Duane Ahmann

Holger J Baasch

David L Roach

Ralph W Scheidecker

In one embodiment, a variably conductive shunt is provided for protecting a read/write sensor element, e.g., an MR read element, which has first and second terminals. A variably conductive member is electrically connected between the first and second terminals. The variably conductive member conducts charge when a potential sufficient to damage the element is applied across the first and second terminals thereby protecting the element from the charge.

Shunt for protecting a hard file head

A transducer suspension system has a transducer head, laminated member, and a load beam. The laminated member is comprised of a support layer, an electrically insulating layer, and an electrically conducting layer. The electrical lines are formed directly into the laminated member. A first end of the support layer has an aperture into which a tongue section protrudes. The transducer head is attached to the tongue section. A platform section is formed between the aperture and the end of the support layer. The electrical lines run to the transducer head along the platform section. The load beam is attached to the laminated member and provides rigid support. The load beam has an aperture located directly above the platform section and provides access to allow clamping of the electrical lines and the platform section during electrical attachment of the lines to the transducer head. Precise electrical attachment is achieved without unwanted bending of the delicate flexure section of the suspension.

Transducer suspension system having access aperture

A transducer suspension system has a transducer head, laminated member, and a load beam. The laminated member is comprised of a support layer, an electrically insulating layer, and an electrically conducting layer. The electrical lines are formed directly into the laminated member. A first end of the support layer has an aperture into which a tongue section protrudes. The transducer head is attached to the tongue section. A platform section is formed between the aperture and the end of the support layer. The electrical lines run to the transducer head along the platform section. The load beam is attached to the laminated member and provides rigid support. The load beam has an aperture located directly above the platform section and provides access to allow clamping of the electrical lines and the platform section during electrical attach of the lines to the transducer head. Precise electrical attachment is achieved without unwanted bending of the delicate flexure section of the suspension.

Method of manufacturing a transducer suspension system

The present invention relates to a head gimbal assembly comprising a slider and a connector cable. The connector cable is attached to the slider using a Z-axis adhesive, whereby electricity is conducted through the adhesive film thickness but not within the plane of the adhesive.

Conductive film connectors for use on head assemblies in drives

A head suspension assembly for use in a disk drive having a load and unload ramp, the head suspension assembly including a load beam, a cover having a load and unload tang, a coating sandwiched between the cover and the load beam, and a head lead wire extending through the coating. In a preferred embodiment, the coating is a visco-elastic thermoplastic adhesive and the cover is a constraining material; whereby the cover is adhered to the load beam and undesired vibrations of the head suspension assembly are dampened. In a method of fabricating the head suspension assembly, the cover is placed over the load beam after the coating is applied and after the head lead wire is strung over the load beam, and then the cover is adhered to the load beam by heating the coating, preferably by placing a heated platen over the cover. Consequently, the load and unload tang, which is part of the cover, is not an obstacle when routing the head lead wire over the load beam and bonding the wire to a slider, and the head suspension assembly fabrication process can be automated.

Method of fabricating a low profile head suspension assembly having load

Low profile head suspension assembly with load and unload capability

A load beam for a direct access storage device is disclosed as having an integral flexure formed of two generally uniform cross section intersecting beams with one of the beams extending between two projecting arms of the load beam. The flexure is spaced from an attached slider by a frustroconical projection formed on the flexure. The pitch and roll of the slider is limited by forming surfaces on the load beam structure that will engage the slider as the slider either pitches or rolls excessively. Overlying the flexure and the slider and adhesively engaged with the flexure is a damping layer of visco-elastic material which will absorb energy and suppress undesirable vibrations. The damping layer is provided with tabs or extensions that are adhered to the projecting arms of the load beam to enhance the vibration damping function of the layer.

Low profile head suspension assembly

A method in which the wires from the heads on an actuator arm can be positioned and attached to the arm electronics automatically. A loadspring manufacturing assembly has a pair of wire carrying and positioning tails and a disposable portion. The disposable portion and the wire carrying and positioning tails each have pegs for controlling the position of the wire and for allowing twisting of the wire pairs for purposes of noise suppression. The wires are positioned about the pegs and twisted. The wires are then bonded to the loadspring assembly. A portion of the wire carrying tail has a window or opening therein. The wires are fanned out and spaced apart as they pass across the window. The wire carrying portion also has a living hinge. A portion of the wire carrying tail which includes a latching window which latches a peg is moved about the hinge and positioned at about a right angle to the loadspring. The disposable portion and the unused tail are removed. The remaining assembly is attached to the arm electronics module through the window with the spaced apart wires.

Method of making load spring manufacturing assembly having an electric

A method and apparatus in which the wires from the heads on an actuator arm can be positioned and attached to the arm electronics automatically. A loadspring manufacturing assembly has a pair of wire carrying and positioning tails and a disposable portion. The disposable portion and the wire carrying and positioning tails each have pegs for controlling the position of the wire and for allowing twisting of the wire pairs for purposes of noise suppression. The wires are positioned about the pegs and twisted. The wires are then bonded to the loadspring assembly. A portion of the wire carrying tail has a window or opening therein. The wires are fanned out and spaced apart as they pass across the window. The wire carrying portion also has a living hinge. A portion of the wire carrying tail which includes a latching window which latches a peg is moved about the hinge and positioned at about a right angle to the loadspring. The disposable portion and the unused tail are removed. The remaining assembly is attached to the arm electronics module through the window with the spaced apart wires.

Method for stringing wire on an actuator arm

The disclosure teaches a method of retarding the loss of carbon dioxide from a circulating water system by means of quaternary ammonium compounds having at least one hydrocarbon radical containing twelve or more carbon atoms or at least two hydrocarbon radicals each containing seven or more carbon atoms. In the method an effective amount of a suitable quaternary ammonium compound is added to the water in the system, surprisingly slowing the rate of loss of carbon dioxide from the water. Carbon dioxide is added to the water as needed to maintain the desired pH. The method provides an advantageous alternative to using stronger and more hazardous acids in maintaining a lowered pH in circulating water systems, for example, in heat exchange systems that utilize cooling towers.

Use of carbon dioxide to reduce the pH in circulating hard water

Growing community of inventors

Rochester, MN, United States of America

William W Brooks