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Thermal-ink heater array using rectifying material

  • US 5,414,245 A
  • Filed: 08/03/1992
  • Issued: 05/09/1995
  • Est. Priority Date: 08/03/1992
  • Status: Expired due to Term
First Claim
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1. A heater array for heating ink in an ink jet printhead comprising:

  • an insulating substrate;

    a first material layer atop the insulting substrate having a first predetermined pattern;

    a first insulating layer atop the first material layer having a plurality of contact windows above the first material layer pattern in corresponding desired heating locations;

    a second material layer atop the first insulating layer having a second predetermined pattern, the first and second material layers being in physical contact with each other through the contact windows in the first insulating layer;

    means for contacting the first material layer; and

    means for contacting the second material layer,wherein each physical contact region between the first and second material layers forms a merged resistive diode junction at each desired heating location, the physical contact region of the resistive diode junction transferring conductive heat directly to ink in an ink jet printhead.

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