| 摘要 |
<p>Disclosed is a thermal print head (A) comprising a substrate (1), a heat-generating resistor (3) supported by the substrate (1), and a protective layer (4) covering 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). A part of the second inner layer (42) is a rough surface portion (42a) having a surface roughness Ra of 0.1-0.3, and the rough surface portion (42a) is arranged at a position corresponding to the heat-generating resistor (3). The outer layer (43) is composed of a metal nitride or a metal nitride-containing compound, and has a thickness of 0.1-0.5 µm.</p> |
