E.i. Dupont De Nemours and Company

Dupont Electronics, Inc.

Du Pont China Limited

Jay Robert Dorfman

Vincenzo Arancio

Vince Arancio

Mark Steven Critzer

John C Crumpton

Michael Zanoni Burrows

Yong Sang Cho

Larry Alan Bidwell

Michael James Champ

John Donald Summers

Man-Sheung Chan

Thomas D Lantzer

William H Morrison, Jr

Arthur Harvey Mones

Joel Slutsky

Richard R Draudt

John D Voultos

David L Sutton

David Andrew Greenhill

This invention is directed to stretchable polymer thick film compositions useful for wearable garments. More specifically, the polymer thick film may be used in applications where significant stretching is required, particularly on substrates that can be highly elongated. A particular type of substrate is a thermoplastic polyurethane substrate.

Stretchable polymer thick film compositions for thermoplastic substrates and wearables electronics

A printable ink for electronic applications is disclosed. The ink contains at least one non-interactive solvent, a binder, optionally one or more particulate fillers that may be conductive, semi-conductive or non-conductive, optionally a co-solvent and optionally other additives.

Printable compositions useful in electronic applications and methods relating thereto

This invention is directed to a polymer thick film transparent conductive composition with haptic response capability that may be used in applications where thermoforming of the base substrate occurs, e.g., as in capacitive switches. Polycarbonate substrates are often used as the substrate and the polymer thick film conductive composition may be used without any barrier layer. Depending on the specific design, the thermoformable transparent conductor may be below or on top of a thermoformable silver conductor. Thermoformable electric circuits benefit from the presence of an encapsulant layer over the dried polymer thick film conductive composition. The electrical circuit is subsequently subjected to an injection molding process.

Thermoformable polymer thick film transparent conductor with haptic response and its use in capacitive switch circuits

This invention is directed to a polymer thick film conductor composition that provides a better conductor when dried at 80&#xb0; C. than when dried at 130&#xb0; C., in contrast to typical PTF conductors. More specifically, the polymer thick film conductor may be used in applications where low temperature curing is required.

Polymer thick film silver conductor with inverted cure profile behavior

This invention is directed to a polymer thick film thermoformable dielectric composition with a high dielectric constant. Dielectrics made from the composition can be used in various electronic applications to enhance the performance of thermoformable capacitive circuits.

High K dielectric composition for thermoformable capacitive circuits

This invention is directed to a polymer thick film transparent conductive composition that may be used in applications where thermoforming of the base substrate occurs, e.g., as in capacitive switches. Polycarbonate substrates are often used as the substrate and the polymer thick film conductive composition may be used without any barrier layer. Depending on the specific design, the thermoformable transparent conductor may be below or on top of a thermoformable silver conductor. Thermoformable electric circuits benefit from the presence of an encapsulant layer over the dried polymer thick film conductive composition. The electrical circuit is subsequently subjected to a injection molding process.

Thermoformable polymer thick film transparent conductor and its use in capacitive switch circuits

This invention is directed to a polymer thick film white reflective flexible dielectric composition comprising urethane resin, thermoplastic phenoxy resin, and white reflective powder. Dielectrics made from the composition can be used in various electronic applications to protect electrical elements and particularly to reflect light in 3D circuits containing LED's.

Flexible white reflective dielectric for electronic circuits

The invention is directed to a polymer thick film positive temperature coefficient carbon resistor composition consisting essentially of: The invention is further directed to positive temperature coefficient (PTC) circuits comprising the composition of the invention which has been dried to remove the solvent and to articles, e.g., mirror heaters and seat heaters, containing such PTC circuits as well as a method for making such PTC circuits.

Polymer thick film positive temperature coefficient carbon composition

This invention is directed to a polymer thick film transparent conductor composition that may be used in applications where thermoforming of the base substrate occurs, e.g., as in capacitive switches. Polycarbonate substrates are often used as the substrate and the polymer thick film conductive composition may be used without any barrier layer. Depending on the specific design, the thermoformable transparent conductor may be below or on top of a thermoformable silver conductor. Thermoformable electric circuits benefit from the presence of an encapsulant layer over the dried polymer thick film transparent conductor composition. The electrical circuit may be subsequently subjected to an injection molding process.

This invention is directed to a polymer thick film thermally conductive thermoformable dielectric composition comprising urethane resin, thermoplastic phenoxy resin, diacetone alcohol and thermally conductive powder. Dielectrics made from the composition can be used in various electronic applications to protect electrical elements and particularly to insulate and protect both the conductive thermoformable silver and the polycarbonate substrate in capacitive switch applications. The thermoformed electrical circuit may be subsequently subjected to an injection molding process.

Thermally conductive dielectric for thermoformable circuits

The present invention uses a silver/silver chloride composition and ink jet technology in the art of digital printing, especially for use in blood glucose sensors.

Ink jettable silver/silver chloride compositions

This invention is directed to a polymer thick film conductor composition. The polymer thick film (PTF) conductor composition may be used in applications where significant stretching is required, particularly on highly permeable substrates. A particular type of substrate which is suitable is a woven polyester coated with polyamide. An electrical circuit containing a conductor formed from the composition and a process to make such a circuit are provided.

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Durham, NC, United States of America

Jay Robert Dorfman