Patent ID: 6304280
Filing Date: 2001-10-16
Classification: B41J

Abstract:
A thermal printhead comprising:an elongated substrate including an obverse surface, a first longitudinal edge face and a second longitudinal edge face opposite to the first longitudinal edge face;a glaze layer formed on the obverse surface of the substrate adjacent to but spaced from the first longitudinal edge face of the substrate;a multiplicity of heating elements formed in a row on the glaze layer;a protective film formed on the obverse surface of the substrate for covering the heating elements;wherein the protective film is formed on the obverse surface of the substrate for covering the heating elements, the protective film extending onto the first longitudinal edge face of the substrate in direct contact therewith the protective film terminating with a taper on the first longitudinal edge face; andwherein a longitudinal edge of the protective film directed toward the second longitudinal edge face of the substrate is tapered.