Frank A Duva

US Patent:

6453527, Sep 24, 2002

Filed:

Nov 11, 1999

Appl. No.:

09/438347

Inventors:

Frank A. Duva - Carlsbad CA

Assignee:

Delaware Capital Formation, Inc. - Wilmington DE

International Classification:

H01G 700

US Classification:

29 2542, 3613014, 361303, 361313, 3613213

Abstract:

A variable, free form shaped capacitor structure formed by casting tape on a belt casting machine, screen printing the tape with thick film metal ink, pressing and curing the printed tape stack, laminating the printed stack, and cutting a free form nonsymmetrical capacitor outline based on the shape of the item in which the capacitor will be stored. The free form capacitor can be cut using a variety of cutting devices, including, a routing machine, a razor blade, a water jet, or a laser. The outline can comprise any shape, including straight lines, angles, convex or concave geometry. Additionally, the various geometrical shapes can exist simultaneously within the same capacitor structure. Upon achievement of the desired shape, ceramic sintering is performed to form a single monolithic capacitor structure.

US Patent:

6512666, Jan 28, 2003

Filed:

Dec 17, 2001

Appl. No.:

10/022717

Inventors:

Frank A. Duva - Carlsbad CA

Assignee:

Delware Capital Formation, Inc. - Wilmington DE

International Classification:

H01G 406

US Classification:

3613212, 361302, 361303

Abstract:

An improved monolithic multilayer ceramic filter capacitor for use with implanted medical devices such as pacemakers and defibrillators. The capacitor includes a parallel stack of positive electrode plates that have sufficient current carrying capability to be directly connected in series with a lead wire from an implanted medical device. Therefore, the capacitor may be used for both filtering and pulsed energy transmission. High current capability is achieved through the use of interleaved electrode plates where the positive electrodes are connected in parallel, and where at least one of the positive electrodes is of sufficiently high conductor density to carry a majority of the current transmitted by the implantable medical device lead.

US Patent:

6627509, Sep 30, 2003

Filed:

Nov 26, 2001

Appl. No.:

09/994328

Inventors:

Frank A. Duva - Carlsbad CA

Assignee:

Delaware Capital Formation, Inc. - Wilmington DE

International Classification:

H01L 2176

US Classification:

438400, 438381, 438382, 438393, 438396, 438404, 361321

Abstract:

A surface flashover resistant multilayer ceramic capacitor. The capacitor has a plurality of layers of the dielectric material and a plurality of electrodes disposed between the layers of dielectric material. The end caps are located at the end of the capacitor and connected to the internal electrodes. A coating of an insulative layer is applied to the outer surface of the capacitor and selected portions of the coating are subsequently removed. The insulative layer coating is a polymer, and specifically a poly-para-xylylene. The insulative layer is applied through a vapor deposition process. The selected portions of the insulative layer are removed by laser ablation.

US Patent:

6683782, Jan 27, 2004

Filed:

Sep 12, 2002

Appl. No.:

10/242204

Inventors:

Frank A. Duva - Carlsbad CA

Assignee:

Delaware Capital Formation, Inc. - Wilmington DE

International Classification:

H01G 406

US Classification:

361311, 361309

Abstract:

A surface flashover resistant multilayer ceramic capacitor. The capacitor has a plurality of layers of dielectric material and a plurality of electrodes disposed between the layers of dielectric material. End caps are located at either end of the capacitor and are connected to one or more of the internal electrodes. A coating comprising one or more insulative layers is applied to the outer surface of the capacitor and selected portions of the coating are subsequently removed. The coating of insulative layer is a polymer, and specifically a poly-para-xylylene. The insulative coating is applied through a vapor deposition process. The selected portions of the insulating layer are removed by laser ablation.

US Patent:

7549373, Jun 23, 2009

Filed:

Nov 26, 2002

Appl. No.:

10/304205

Inventors:

James E Brooks - Manvel TX, US
Nolan C. Lerche - Stafford TX, US
Frank A. Duva - Carlsbad CA, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

F42B 3/10

US Classification:

1022027, 1022025, 102218, 361779, 361793

Abstract:

A detonator assembly according to one arrangement includes a capacitor discharge unit having a capacitor and a resistor formed on a surface of the capacitor. At least one side of the resistor is electrically connected to one electrode of the capacitor. In another arrangement, another type of energy source besides the capacitor is used.

US Patent:

7570996, Aug 4, 2009

Filed:

Feb 7, 2006

Appl. No.:

11/348681

Inventors:

Ann M. Crespi - Mobile AL, US
John D. Norton - New Brighton MN, US
Frank A. Duva - Carlsbad CA, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61N 1/00

US Classification:

607 9

Abstract:

An improved manufacturing and packaging process for optimizing the size of various implanted medical devices is disclosed. Specifically, complex shapes involving ceramic capacitors with various other shapes are manufactured to optimize fit and shapes within the device housing. The manufacturing process includes various techniques and electrode material selections, including manufacturing processes that enable high energy discharge capacitors to be made in compliant shapes to fit in small ICD footprints.

US Patent:

20040220627, Nov 4, 2004

Filed:

Apr 30, 2003

Appl. No.:

10/426680

Inventors:

Ann Crespi - Mobile AL, US
John Norton - New Brighton MN, US
Frank Duva - Carlsbad CA, US

International Classification:

A61N001/375

US Classification:

607/005000, 607/036000

Abstract:

An improved manufacturing and packaging process for optimizing the size of various implanted medical devices is disclosed. Specifically, complex shapes involving ceramic capacitors with various other shapes are manufactured to optimize fit and shapes within the device housing. The manufacturing process includes various techniques and electrode material selections, including manufacturing processes that enable high energy discharge capacitors to be made in compliant shapes to fit in small ICD footprints.

US Patent:

58256083, Oct 20, 1998

Filed:

Oct 18, 1996

Appl. No.:

8/734027

Inventors:

Frank A. Duva - Carlsbad CA

Assignee:

Novacap, Inc. - Valencia CA

International Classification:

H01G 435
H01B 1728

US Classification:

361302

Abstract:

A feed-through filter capacitor assembly is provided to pass a conductor into a housing of an electronic device while maintaining a hermetic seal and filtering spurious radio frequency signals. The assembly is particularly suitable for use in medical implant devices such as pacemakers. The feed-through filter capacitor assembly comprises a conductive bushing forming a cup that receives a filter capacitor body. The cup is located to one side of a pass-through portion including a passageway in which an insulative spacer is mounted. A plurality of wires pass through the filter capacitor body and spacer. The wires are contacted with inner plates of the capacitor and insulated from the bushing. Conductive polymer resin within the cup provides electrical continuity between outer contacts of the capacitor body and the conductive bushing. This arrangement also provides an effective heat sink for the filter capacitor body and protects the filter capacitor body from physical damage.