Moisture leakage resistant capping surface for ink jet printhead

A sealing assembly for an ink jet printhead, comprising:

• a printhead die having a front face with nozzles therein;
• a substrate bonded to said printhead die and having a front face;
• an ink manifold sealed to said printhead die and having a front face;
• and
• a spreadable sealing filler material caulked between said substrate and said manifold on opposed sides of said printhead die,
• wherein said front face of said substrate, said front face of said manifold and said caulked filler material form a continuous surface surrounding said printhead die.

A method for providing a sealing surface on a printhead, comprising the sequential steps of:

• coupling a printhead die to a substrate;
• coupling an ink manifold to the printhead die and forming a gap between the manifold and the substrate;
• applying a bead of filler material into the gap between the manifold and the substrate;
• and
• wiping the excess filler material from the manifold and the substrate to form a sealing surface defined by the manifold, filler material and substrate.

An ink jet printhead assembly comprising:

• a front face including a printhead die, a substrate and an ink manifold, wherein a gap is defined between said substrate and said ink manifold adjacent said printhead die after assembly;
• and
• a spreadable sealing filler material disposed within said gap,
• said filler material being disposed in said gap by the process of applying a bead of said filler material into said gap and wiping excess filler material from said front face to form a continuous sealing surface on said front face.