Robert V Waldrop

US Patent:

7691280, Apr 6, 2010

Filed:

Mar 23, 2006

Appl. No.:

11/387460

Inventors:

Robert Paul Waldrop - Chapel Hill NC, US
Steven Dale Ittel - Wilmington DE, US

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

B44C 1/22

US Classification:

216 87, 216 91, 216 92, 216 96, 216103

Abstract:

The present invention is directed to processes for ink jet printing of etchant or modifier materials for creating patterns, particularly for electronics and display applications. The present invention also relates to devices made using the processes.

US Patent:

20110281024, Nov 17, 2011

Filed:

Nov 11, 2010

Appl. No.:

12/944205

Inventors:

John C. Crumpton - Bahama NC, US
Robert Paul Waldrop - Chapel Hill NC, US

Assignee:

E. I. DU PONT DE NEMOURS AND COMPANY - Wilmington DE

International Classification:

B05D 5/12
B05D 3/00
B05D 1/38

US Classification:

427 976

Abstract:

Disclosed is the use of carbon layers as barriers to prevent silver migration in circuitry crossovers, either over a bottom circuitry layer and/or beneath subsequent circuit layers.

US Patent:

20120305858, Dec 6, 2012

Filed:

May 15, 2012

Appl. No.:

13/472101

Inventors:

KENNETH WARREN HANG - Cary NC, US
HENA PYADA - Dorado PR, US
HOWARD T. SAWHILL - Chapel Hill NC, US
MICHAEL A. SKURSKI - Cary NC, US
ROBERT PAUL WALDROP - Chapel Hill NC, US

Assignee:

E I DU PONT DE NEMOURS AND COMPANY - Wilmington DE

International Classification:

H01B 1/02

US Classification:

252514

Abstract:

The present invention is directed to an electroconductive thick film paste composition comprising Ag and a Pb-free bismuth-tellurium oxide both dispersed in an organic medium, wherein the paste is fireable at temperatures below 420 C. The paste is especially useful for forming electrodes on substrates such as glass or films, particularly electrochromic glass or films, that would be damaged by higher firing temperatures. The present invention is further directed to a device comprising an electrode formed from the paste composition and, in particular, to an electrochromic device comprising such an electrode.

US Patent:

20120305859, Dec 6, 2012

Filed:

May 15, 2012

Appl. No.:

13/472182

Inventors:

Kenneth Warren Hang - Cary NC, US
Hena Pyada - Cary NC, US
Howard T. Sawhill - Chapel Hill NC, US
Michael A. Skurski - Cary NC, US
Robert Paul Waldrop - Chapel Hill NC, US

Assignee:

E I DU PONT DE NEMOURS AND COMPANY - Wilmington

International Classification:

H01B 1/22

US Classification:

252514

Abstract:

The present invention is directed to an electroconductive thick film paste composition comprising Ag and a Ph-free Bi-based glass frit both dispersed in an organic medium, wherein the paste is fireable at temperatures below 420 C. The paste is especially useful for forming electrodes on substrates such as glass or films, particularly electrochromic glass or films, that would be damaged by higher firing temperatures. The present invention is further directed to a device comprising an electrode formed from the paste composition and, in particular, to an electrochromic device comprising such an electrode.