Thermal head and printing device
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United States of America Patent
Stats
-
Mar 15, 2011
Grant Date -
Nov 8, 2007
app pub date -
Mar 12, 2007
filing date -
Mar 17, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A thermal head includes a glass layer having a protruding section formed on one surface and a concave groove section formed on the other surface facing the protruding section, a heat generation resistor provided on the protruding section, and a pair of electrodes provided to both sides of the heat generation resistor, and a part of the heat generation resistor exposed between the pair of electrodes is defined as a heat generation section, the protruding section has a smaller curvature radius in both sides than a curvature radius in a central portion, and a width of the groove section is one of equal to and larger than a length of the heat generation section.
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