| 摘要 |
<p>An ink jet print head apparatus that includes an ink well (30,130) and an ink expulsion mechanism (13,113) formed on a substrate. A protection layer (17,117) is formed bewteen the ink well (30,130) and the expulsion mechanism (13,113) and that layer has a reduced thickness, preferably below 7400 angstroms, to permit a reduced supply of energy to the expulsion mechanism. The protection layer (17,117) preferably includes an electrical passivation layer having electrical isolation material. Various other layer arrangements are also described including layers that protect against liquid corrosion, cavitation (18) and both (118'). <IMAGE></p> |
