Liquid discharge head
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United States of America Patent
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-
Jan 11, 2011
Grant Date -
Mar 1, 2007
app pub date -
Aug 29, 2006
filing date -
Sep 1, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A liquid discharge head includes a substrate which has a heating resistive element for generating a bubble in a liquid, and a first wall member which faces the heating resistive element. A discharge port which discharges the liquid is provided in the first wall member, and an ink channel communicated with the discharge port is formed between the substrate and the first wall member. In the liquid discharge head, the substrate includes a second wall member around the heating resistive element, the second wall member being protruded in a direction toward the discharge port, the first wall member includes a protrusion portion in a surface facing the substrate, the protrusion portion being protruded toward the heating resistive element, and an end portion of the protrusion portion exists in a region in which the second wall member surrounds the heating resistive element.
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