Electrohydrodynamic (EHD) printing for the defect repair of contact printed circuits
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United States of America Patent
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Nov 24, 2015
Grant Date -
Jun 12, 2014
app pub date -
Dec 11, 2012
filing date -
Dec 11, 2012
priority date (Note) -
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Abstract
A method is provided for repairing defects in a contact printed circuit. The method provides a substrate with a contact printed circuit formed on a substrate top surface. After detecting a discontinuity in a printed circuit feature, a bias voltage is applied to at least one of a first region of the printed circuit feature or a second region of the printed circuit feature. The bias voltage may also be applied to both the first and second regions. An electric field is formed between the bias voltage and an ink delivery nozzle having a voltage potential less than the bias voltage. Conductive ink is attracted into the electric field from the ink delivery nozzle. Conductive ink is printed on the discontinuity, forming a conductive printed bridge. Typically, the ink delivery nozzle is an electrohydrodynamic (EHD) printing nozzle.
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