Patent ID: 6239820
Filing Date: 2001-05-29
Classification: B41J

Abstract:
A printhead substructure for an ink-jet pen, that has a circuit member with conductive leads, the substructure comprising:a substrate having a first end and a second end;a transducer member attached to the first end of the substrate;palladium bonding pads attached to the substrate for receiving electrical signals, the palladium bonding pads positioned at the second end of the substrate and exposed for connecting with leads of the circuit member; andthe pads being part of a single conductive layer that also forms palladium traces extending from the palladium bonding pads to the transducer member, the palladium traces operable for conveying electrical signals from the bonding pads to the transducer member; anda graded thin-film structure overlaying the palladium traces, the graded thin-film structure including the transducer member, a passivation level, and a cavitation barrier level in a single graded layer.