| 摘要 |
A thermal print head A includes a substrate 1, a heat generating resistor 3 supported by the substrate 1, and a protective layer 4 which covers the heat generating resistor 3. The protective layer 4 includes a first inner layer 41 which is in contact with the heat generating resistor 3, a second inner layer 42 formed on the first inner layer 41, and an outer layer 43. Part of the second inner layer 42 is formed as a rough surface 42a which has a surface roughness of Ra 0.1 through 0.3. The rough surface 42a is disposed at a position corresponding to the heat generating resistor 3. The outer layer 43 is made of a metal nitride or a chemical compound containing a metal nitride, and has a thickness of 0.1 through 0.5 μm.
|
