Inspection apparatus and method for liquid discharge head and liquid discharge head
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United States of America Patent
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Jan 31, 2017
Grant Date -
Sep 8, 2016
app pub date -
Feb 22, 2016
filing date -
Mar 3, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus for inspecting a liquid discharge head including an energy generation element provided on an element substrate and configured to make energy act on a liquid to discharge the liquid from an orifice, a lower protection film having an electrical insulating property and provided on the element substrate while covering the energy generation element, a wiring layer provided between the element substrate and the lower protection film and configured to supply electrical signal for driving to the energy generation element, and a conductive upper protection film provided on the lower protection film is provided. The apparatus comprises a detection circuit configured to detect a potential of the upper protection film when the energy generation element is driven; and a determination circuit configured to determine a driving state of the energy generation element from information about the potential detected by the detection circuit.
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