National Research Council of Canada

Her Majesty the Queen in Right of Canada (...)

E2ip Technologies Inc.

Groupe Graham International Inc.

Sylvie Lafreniere

Chantal Paquet

Arnold Kell

Patrick Malenfant

Olga Mozenson

Bhavana A Deore

Xiangyang Liu

Jafar Shaker

Khelifa Hettak

Reza Chaharmir

Jonathan Ethier

Adrian Momciu

Jian Xiong Hu

Julie Ferrigno

Olivier Ferrand

The present invention relates to an electronic device comprising a printed substrate comprising a trace of molecular ink thereon, the molecular ink being sintered to form a conductive metal trace forming the electronic device, wherein the molecular ink is chosen from a) a flake-less printable composition of 30-60 wt % of a C-Csilver carboxylate, 0.1-10 wt % of a polymeric binder and balance of at least one organic solvent, all weights based on total weight of the composition; or b) a flake-less printable composition of 5-75 wt % of bis(2-ethyl-1-hexylamine) copper (II) formate, bis(octylamine) copper (II) formate or tris(octylamine) copper (II) formate, 0.25-10 wt % of a polymeric binder and balance of at least one organic solvent, all weights based on total weight of the composition.

Printed electronics

A flake-less molecular ink suitable for printing (e.g. screen printing) conductive traces on a substrate has 30-60 wt % of a C-Csilver carboxylate or 5-75 wt % of bis(2-ethyl-1-hexylamine) copper (II) formate, bis(octylamine) copper (II) formate or tris(octylamine) copper (II) formate, 0.1-10 wt % of a polymeric binder (e.g. ethyl cellulose) and balance of at least one organic solvent. Conductive traces formed with the molecular ink are thinner, have lower resistivity, have greater adhesion to a substrate than metal flake inks, have better print resolution and are up to 8 times less rough than metal flake inks. In addition, the shear force required to remove light emitting diodes bonded to the traces using Loctite 3880 is at least 1.3 times stronger than for commercially available flake-based inks.

Molecular inks

Growing community of inventors

Montreal, Canada

Sylvie Lafreniere