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AssigneeNational Research Council of Canada
InventorsBhavana DEORE, Chantal PAQUET, Patrick Roland Lucien MALENFANT
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A copper-based ink contains copper acetate, 3-dimethylamino-1,2-propanediol and a silver salt. The ink may be coated on a substrate and decomposed on the substrate to form a conductive copper coating on the substrate. The ink provides micron-thick traces and may be screen printed and thermally sintered in the presence of up to about 500 ppm of oxygen or photo-sintered in air to produce highly conductive copper features. Sintered copper traces produced from the ink have improved air stability, and have improved sheet resistivity for 5-20 mil wide screen-printed lines with excellent resolution.
A method of producing a conductive copper coating on a substrate, the method comprising:
A copper-based ink comprising copper acetate, 3-dimethylamino-1,2-propanediol and a silver salt, wherein the copper acetate and 3-dimethylamino-1,2-propanediol are in a molar ratio of about 1:1 to about 1:2.
Dependencies are inferred from the claim text.