Surface pretreatment and drop spreading control on multi component surfaces
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United States of America Patent
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Oct 3, 2017
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app pub date -
Jan 21, 2014
filing date -
Jan 21, 2013
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Abstract
Methods, systems and produced printed substrates are provided, which include substrates composed of one or more materials which are treated by an intermediate layer for normalizing surface energies and a digitally printed formulation adapted to the normalized surface energies. Surface energy normalization may be carried out by physical processes or by selective chemical processes. In an example, a self-assembled monolayer is applied to the surface of a printed circuit board to control ink jet dots by reducing copper surface energy and to improve ink adhesion. The self-assembled monolayer binds via an α group selectively and covalently to the copper on the board and binds via a hydrophobic ω group to solder mask ink that is applied to the board. The ω group participates in the solidification process of the ink.
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