INKJET PRINT HEAD WITH CHARGE DEVICE

摘要

An ink jet printhead (8) includes a drop generator (11) having an attached orifice structure (10) forming a jet array adapted to use ink jet fluids with a charge device (12)disposed opposite the jet array (15) forming a gap (13). The charge device includes a dimensionally stable, non-porous substrate layer (14) having a high load to deflection ratio, one or more electrically conducting leads (16) bonded to the substrate layer, an insulating protective layer (20) disposed over the electrically conducting lead, and a non-wetting polymer (22) coating compatible with the ink jet fluids disposed on the insulating protective layer. The coating reduces the capillary forces that hold liquid in the gap between the orifice structure and the charge device.