Liquid ejection head having structural modifications to film layers and method of manufacturing the same
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United States of America Patent
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Mar 31, 2015
Grant Date -
Feb 6, 2014
app pub date -
Jul 26, 2013
filing date -
Jul 31, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A liquid ejection head includes a substrate having a supply port that is a through-hole for supplying liquid; an energy generating element for generating energy to be used for ejecting the liquid; a first film that covers the energy generating element; a second film formed on the first film; and a flow path forming member bonded to the substrate, for forming a flow path for supplying the liquid supplied from the supply port to an ejection orifice. When viewed from a direction perpendicular to the substrate, an end portion of the first film extends inwardly from an opening edge of the supply port, and an end portion of the second film is located between the opening edge of the supply port and the end portion of the first film.
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