Thin film resistor printhead architecture for thermal ink jet pens
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United States of America Patent
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Oct 3, 1995
Issued Date -
N/A
app pub date -
Mar 2, 1994
filing date -
Oct 31, 1990
priority date (Note) -
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Abstract
A thermal ink jet printhead including a thin film substrate with a plurality of polygon shaped thin film resistors, a barrier layer overlying the substrate, and respective firing chambers formed in the barrier layer for each of the resistors. Each firing chamber is formed of a continuously curved concave wall having ends adjacent the boundary of the resistor, and which is within the boundary of the area defined by the resistor and a 10 micrometer wide margin around the resistor.
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