Thermal print head

Details Thermal print head Thermal print head

2011-03-22

2011-03-22

Tran, Huan H (Department: 2861)

Incremental printing of symbolic information

Thermal marking apparatus or processes

Specific resistance recording element type

Reexamination Certificate

active

07911489

ABSTRACT:
A thermal print head A includes a substrate1, a heat generating resistor3supported by the substrate1, and a protective layer4which covers the heat generating resistor3. The protective layer4includes a first inner layer41which is in contact with the heat generating resistor3, a second inner layer42formed on the first inner layer41, and an outer layer43. Part of the second inner layer42is formed as a rough surface42awhich has a surface roughness of Ra 0.1 through 0.3. The rough surface42ais disposed at a position corresponding to the heat generating resistor3. The outer layer43is made of a metal nitride or a chemical compound containing a metal nitride, and has a thickness of 0.1 through 0.5 μm.

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