Christopher James Dunn

US Patent:

7379271, May 27, 2008

Filed:

Jul 11, 2005

Appl. No.:

11/179707

Inventors:

Christopher Schreiber - Temecula CA, US
Christopher Dunn - Temecula CA, US

Assignee:

Magnecomp Corporation - Temecula CA

International Classification:

G11B 21/16

US Classification:

3602453

Abstract:

Shaping of a gimbal suspension element for a disk drive suspension using fewer process steps includes disposing an element, precursor assembly of a plastic film layer and a copper layer with an interlayer of a copper seed layer and a Monel alloy for etching, and etching the assembly with an etchant such as cupric chloride for both the alloy and the copper seed layer of the interlayer.

US Patent:

7781679, Aug 24, 2010

Filed:

Jan 26, 2006

Appl. No.:

11/340298

Inventors:

Christopher Schreiber - Temecula CA, US
Christopher Dunn - Temecula CA, US

Assignee:

Magnecomp Corporation - Murrieta CA

International Classification:

H05K 1/00

US Classification:

174254, 174255, 174256, 174257, 174259, 174265, 361757, 361771, 361793, 428408, 428457, 3602345, 3602459, 360246

Abstract:

A disk drive suspension interconnect, and method therefor. The interconnect has a metal grounding layer, a metal conductive layer and an insulative layer between the metal grounding layer and the conductive metal layer. A circuit component such as a slider is electrically connected to the conductive layer along a grounding path from the circuit component and the conductive layer to the metal grounding layer through an aperture in the insulative layer. For improved electrical connection a tie layer is provided through the insulative layer onto the grounding layer in bonding relation with the ground layer. A conductor is deposited onto both the conductive metal layer and the tie layer in conductive metal layer and tie layer bonding relation, and the circuit component is thus bonded to the grounding layer by the conductor.

US Patent:

7829793, Nov 9, 2010

Filed:

Jul 13, 2006

Appl. No.:

11/485912

Inventors:

Christopher Schreiber - Temecula CA, US
Christopher Dunn - Temecula CA, US

Assignee:

Magnecomp Corporation - Temecula CA

International Classification:

H05K 1/00

US Classification:

174254, 174255, 174256, 174257, 174259, 174261, 174265, 361757, 361771, 361793, 428408, 428457, 29593, 29595, 29846, 29852, 29885

Abstract:

An additive process disk drive suspension interconnect, and method therefor is provided. The interconnect has a metal grounding layer of typically stainless steel or copper metallized stainless steel, a metal conductive layer and an insulative layer between the metal grounding layer and the conductive metal layer. A circuit component such as a slider is electrically connected to the conductive layer along a grounding path from the circuit component and the conductive layer to the metal grounding layer through an aperture in the insulative layer. For improved electrical connection a tie layer is provided through the insulative layer onto the grounding layer in bonding relation with the ground layer. A conductor is deposited onto both the conductive metal layer and the tie layer in conductive metal layer and tie layer bonding relation, and the circuit component is thus bonded to the grounding layer by the conductor.

US Patent:

8085506, Dec 27, 2011

Filed:

Aug 27, 2007

Appl. No.:

11/845210

Inventors:

Kuen Chee Ee - Temecula CA, US
Christopher Gene Dunn - Austin TX, US
Keith Allan Vanderlee - Austin TX, US
Peter Sung Hahn - Wildomar CA, US

Assignee:

Magnecomp Corporation - Murrieta CA

International Classification:

G11B 5/48
G11B 21/16

US Classification:

3602458, 3602453, 3602459

Abstract:

A gimbal, a disk drive suspension that includes the gimbal, and a related method of manufacture, wherein the gimbal is configured to be coupled between a disk drive slider and a disk drive load beam. The gimbal includes a strut having a buss and a projection that is coupled to the buss. A combination of the projection and the buss define a gap.

US Patent:

8303792, Nov 6, 2012

Filed:

Aug 29, 2008

Appl. No.:

12/200947

Inventors:

Christopher Schreiber - Lake Elsinore CA, US
Peter Hahn - Wildomar CA, US
Christopher Dunn - Austin TX, US

Assignee:

Magnecomp Corporation - Murrieta CA

International Classification:

C25D 5/02

US Classification:

205122, 205241

Abstract:

A method of preparing an additive suspension circuit for a hard disk drive suspension includes electrodepositing an alloy of copper using an electrolytic bath containing copper sulfate, tin, iron, sulfuric acid, and hydrochloric acid, using pulsed current of about 10-45 amperes per square foot.

US Patent:

8395866, Mar 12, 2013

Filed:

Aug 13, 2009

Appl. No.:

12/540870

Inventors:

Christopher Schreiber - Temecula CA, US
Christopher Dunn - Austin TX, US

Assignee:

Magnecomp Corporation - Murrieta CA

International Classification:

G11B 5/48

US Classification:

3602459, 3602458

Abstract:

A disk drive suspension circuit has copper signal conductors connected by vias through an insulative layer to respective stainless steel flying leads. The stainless steel flying leads are activated and plated with one or more metals, with a final layer over the flying lead being a layer such as gold, suitable for bonding to form bond pads. The gold bond pads may be attached using thermosonic welding, solder ball bonding, or other suitable methods to an electrical component such as wires or a the disk drive's pre-amp circuit.

US Patent:

8553364, Oct 8, 2013

Filed:

Nov 23, 2009

Appl. No.:

12/623983

Inventors:

Christopher Schreiber - Temecula CA, US
Christopher Gene Dunn - Austin TX, US

Assignee:

Magnecomp Corporation - Murrieta CA

International Classification:

G11B 5/48

US Classification:

3602459

Abstract:

A low impedance, low crosstalk disk drive suspension circuit has multiple traces carrying a first polarity of a differential signal, interleaved with multiple traces carrying the second polarity of a differential signal. Each pair of conductors consisting of a trace of the first polarity and a trace of the second polarity may cross over each other at multiple crossover points. The crossover connections may utilize a second layer of copper trace conductors over the first and main layer, or alternatively the crossover connections may utilize an isolated portion of the suspension substrate.

US Patent:

D3828450, Aug 26, 1997

Filed:

Jun 3, 1996

Appl. No.:

D/055022

Inventors:

Christopher J. Dunn - Scottsdale AZ

International Classification:

1216

US Classification:

D12186