David Benjamin Arthur

US Patent:

6762237, Jul 13, 2004

Filed:

Jun 10, 2002

Appl. No.:

10/165306

Inventors:

Paul J. Glatkowski - Littleton MA
David J. Arthur - Norwood MA

Assignee:

Eikos, Inc. - Franklin MA

International Classification:

C08K 304

US Classification:

524496, 524495

Abstract:

The present invention relates to a novel nanocomposite dielectric comprising a polymer matrix and a plurality of carbon nanotubes dispersed therein. A method for increasing a dielectric constant of a polymer matrix, as well as a laminate and mobile antenna comprising the novel dielectric are also disclosed.

US Patent:

6988925, Jan 24, 2006

Filed:

May 21, 2003

Appl. No.:

10/442176

Inventors:

David J. Arthur - Norwood MA, US
Paul J. Glatkowski - Littleton MA, US

Assignee:

Eikos, Inc. - Franklin MA

International Classification:

H01J 9/04
H01J 9/12
H01J 9/14

US Classification:

445 46, 427 77, 427197

Abstract:

A method for making a nanocomposite electrode or circuit pattern includes forming a continuous carbon nanotube layer impregnated with a binder and patterning the binder resin using various printing or photo imaging techniques. An alternative method includes patterning the carbon nanotube layer using various printing or imaging techniques and subsequently applying a continuous coating of binder resin to the patterned carbon nanotube layer. Articles made from these patterned nanocomposite coatings include transparent electrodes and circuits for flat panel displays, photovoltaics, touch screens, electroluminescent lamps, and EMI shielding.

US Patent:

7378040, May 27, 2008

Filed:

Aug 11, 2005

Appl. No.:

11/201275

Inventors:

Jiazhong Luo - Acton MA, US
David J. Arthur - Norwood MA, US
Paul J. Glatkowski - Littletown MA, US

Assignee:

Eikos, Inc. - Franklin MA

International Classification:

H01B 1/00

US Classification:

252500, 252502, 252511, 427 77, 156 60, 174546, 4234471, 423445 R

Abstract:

This invention relates to flexible, transparent and conductive coatings and films formed using carbon nanotubes (CNT) and, in particular, single wall CNT, with polymer binders. Preferably, coatings and films are formed from CNT applied to transparent substrates forming one or multiple conductive layers at nanometer level of thickness. Polymer binders are applied to the CNT network coating having an open structure to provide protection through infiltration, and may comprise a basecoat, a topcoat, or a combination thereof, providing enhanced optical transparency, conductivity, moisture resistance, thermal resistance, abrasion resistance and interfacial adhesion. Polymers may be thermoplastics, thermosets, insulative, conductive or a combination thereof. A fluoropolymer containing binder is applied onto a CNT-based transparent conductive coating at nanometer level of thickness on a clear substrate. The fluoropolymers or blend can be either semi-crystalline or amorphous.

US Patent:

20040265550, Dec 30, 2004

Filed:

Dec 8, 2003

Appl. No.:

10/729369

Inventors:

Paul Glatkowski - Littleton MA, US
David Arthur - Norwood MA, US

International Classification:

B32B003/00

US Classification:

428/209000

Abstract:

The invention is directed to compositions and methods for forming highly transparent and electrically conductive coatings/films by exploiting self patterning nanostructures composed of electrically conductive materials. The resulting layer is suitable for conducting electricity in applications where a transparent electrode is required. Typical applications include, but are not limited to; LC displays, touch screens, EMI shielding windows, and architectural windows. In one embodiment, carbon nanotubes are applied to an insulating substrate to form an electrically conductive network of nanotubes with controlled porosity in the network. The open area, between the networks of nanotubes, increases the optical transparency in the visible spectrum while the continuous nanotube phase provides electrical conductivity across the entire surface or patterned area. Through the controlled application of this self assembled network of nanotubes of by means of printing or spraying, patterned areas can be formed to function as electrodes in devices. The use of printing technology to form these electrodes obviates the need for more expensive process such as vacuum deposition and photolithography typically employed today during the formation of ITO coatings.

US Patent:

20050266162, Dec 1, 2005

Filed:

Mar 14, 2005

Appl. No.:

11/079012

Inventors:

Jiazhong Luo - Acton MA, US
Philip Wallis - Barrington RI, US
David Arthur - Norwood MA, US
Paul Glatkowski - Littletown MA, US

International Classification:

B05D001/12

US Classification:

427180000

Abstract:

The invention is directed to compositions and methods for forming conductive patterned coatings of carbon nanotubes. Patterns are electrically conductive coatings/films made by exploiting self patterning nanostructures composed of electrically conductive materials. The resulting layer is suitable for conducting electricity in applications where a transparent electrode is required. Typical applications include, but are not limited to; LC displays, touch screens, EMI shielding windows, and architectural windows. Films may be highly transparent. In one embodiment, carbon nanotubes are applied to an insulating substrate to form an electrically conductive network of nanotubes with controlled porosity in the network. The open area between the networks of nanotubes, increases the optical transparency in the visible spectrum while the continuous nanotube phase provides electrical conductivity across the entire surface or patterned area. Through the controlled application of this self assembled network of nanotubes by means of printing or spraying, patterned areas can be formed to function as electrodes in devices. The use of printing technology to form these electrodes obviates the need for more expensive process such as vacuum deposition and photolithography typically employed today during the formation of ITO coatings.

US Patent:

20060111008, May 25, 2006

Filed:

Jan 12, 2006

Appl. No.:

11/330284

Inventors:

David Arthur - Norwood MA, US
Paul Glatkowski - Littleton MA, US

International Classification:

H01J 9/12

US Classification:

445046000

Abstract:

A method for making a nanocomposite electrode or circuit pattern includes forming a continuous carbon nanotube layer impregnated with a binder and patterning the binder resin using various printing or photo imaging techniques. An alternative method includes patterning the carbon nanotube layer using various printing or imaging techniques and subsequently applying a continuous coating of binder resin to the patterned carbon nanotube layer. Articles made from these patterned nanocomposite coatings include transparent electrodes and circuits for flat panel displays, photovoltaics, touch screens, electroluminescent lamps, and EMI shielding.

US Patent:

53744535, Dec 20, 1994

Filed:

Jul 13, 1993

Appl. No.:

8/090488

Inventors:

Gwo S. Swei - Northboro MA
David J. Arthur - Norwood MA

Assignee:

Rogers Corporation - Rogers CT

International Classification:

B05D 302

US Classification:

427226

Abstract:

A method for making a particulate filled polymeric matrix composite film includes mixing a polymeric matrix material with a dispersion of particulate filler in a carrier liquid to form a casting composition and adjusting the viscosity of the casting composition to retard separation of the particulate filler from the composition. A layer of the viscosity-adjusted casting composition is cast on a substrate and the layer is consolidated to form the particulate filled polymer matrix composite film. Films made by the method include very thin, e. g less than 1. 0 mil, fluoropolymeric matrix films highly filled with very small diameter, preferably spherical, particles for use as, e. g. dielectric substrate materials in laminar electrical circuits.

US Patent:

48492841, Jul 18, 1989

Filed:

Feb 17, 1987

Appl. No.:

7/015191

Inventors:

David J. Arthur - Norwood MA
John C. Mosko - Wilmington DE
Connie S. Jackson - Thompson CT
G. Robert Traut - Killingly CT

Assignee:

Rogers Corporation - Rogers CT

International Classification:

B32B 516
B32B 1702
B32B 2720
H05K 100

US Classification:

428325

Abstract:

A ceramic filled fluoropolymer-based electrical substrate material well suited for forming rigid printed wiring board substrate materials and integrated circuit chip carriers is presented which exhibits improved electrical performance over other printed wiring board materials and circuit chip carriers. Also, the low coefficients of thermal expansion and compliant nature of this electrical substrate material results in improved surface mount reliability and plated through-hole reliability. The electrical substrate material preferably comprises polytetrafluoroethylene filled with silica along with a small amount of microfiberglass. In an important feature of this invention, the ceramic filler (silica) is coated with a silane coating material which renders the surface of the ceramic hydrophobic and provides improved tensile strength, peel strength and dimensional stability.