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Electrohydrodynamic (EHD) printing for the defect repair of contact printed circuits

  • US 9,198,299 B2
  • Filed: 12/11/2012
  • Issued: 11/24/2015
  • Est. Priority Date: 12/11/2012
  • Status: Active Grant
First Claim
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1. A method for repairing defects in a contact printed circuit, the method comprising:

  • providing a substrate with a contact printed circuit formed on a substrate top surface;

    detecting a discontinuity in a printed circuit feature;

    applying a bias voltage to at least one of a first region of the printed circuit feature and a second region of the printed circuit feature;

    forming an electric field between the bias voltage and an ink delivery nozzle having a voltage potential less than the bias voltage;

    attracting conductive ink into the electric field from the ink delivery nozzle;

    printing the conductive ink on the discontinuity;

    forming a conductive printed bridge; and

    ,eliminating the discontinuity.

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