Apparatus and method for routing power and ground lines in a ink-jet printhead

  • US 6,260,952 B1
  • Filed: 04/22/1999
  • Issued: 07/17/2001
  • Est. Priority Date: 04/22/1999
  • Status: Active Grant
First Claim
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1. An ink-jet printhead, comprising:

  • a thin film substrate, said substrate including a plurality of thin film layers, said plurality including a passivation layer and an electrically conductive thin film layer underlying said passivation layer;

    an ink barrier layer overlying said thin film substrate, said ink barrier layer defining ink chambers and ink channels, said ink barrier layer having a peripheral edge, said substrate further including a substrate portion extending beyond said ink barrier layer peripheral edge;

    a bond pad disposed on said substrate portion adjacent said ink barrier layer peripheral edge; and

    means for coupling electrically said bond pad to said electrically conductive thin film layer at a location within said substrate portion.

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