THICK-FILM THERMAL PRINT HEAD AND ITS MANUFACTURING METHOD

摘要

The thermal printhead (1) includes an insulating substrate (2), a heating resister (5) formed on the substrate (2), a first glass coat layer (7) formed on the substrate (2) for covering the heating resister (5), and a second glass coat layer (8) formed on the first glass coat layer (7). The heating resister (5) has a centerline average roughness not greater than 0.3 mu m. The first glass coat layer (7) has a centerline average roughness not greater than 0.1 mu m. <IMAGE>