Coating for Ink Jet Nozzles
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01
For ink jet printing, it is necessary that there be a smooth and uniform release of ink drops from the nozzle, especially for drop-on-demand nozzles. For this purpose, non-wetting coatings are often used. A dual coating that can be used for an oxidized silicon nozzle is a TiO2 (or SnO2) layer - polymer outer layer. The TiO2 or SnO2 layer can be applied by vapor techniques while the polymer outer layer (e.g., polyethylene) can be applied as an emulsion in a low molecular weight liquid where the liquid is evaporated and the remaining polymer is fused with heat.