Thermal print head, manufacturing method of thermal print head, and thermal printer

A manufacturing method of a thermal print head, comprising:

• forming a main surface facing a thickness direction, and a protruding surface connected to the main surface and protruding toward one side which the main surface faces in the thickness direction on a base material;
• forming a resistance layer on the main surface and the protruding surface, the resistance layer including a plurality of heating portions arranged in a main scan direction;
• and
• forming a wiring layer in contact with the resistance layer and conductive to the plurality of heating portions,
• wherein the protruding surface includes a top surface parallel to the main surface, and a pair of inclined surfaces connected to the top surface and the main surface and arranged apart from each other in a secondary scan direction,
• wherein the manufacturing method further comprises forming a glaze layer in contact with the top surface between the forming of the main surface and the protruding surface and the forming of the resistance layer,
• wherein in the forming of the glaze layer, after providing a glaze material in a fluid to the top surface, the glaze material is sintered to form the glaze layer, and
• wherein the sintering of the glaze material contracts the glaze material in a manner that an end edge of the glaze layer recedes to an inner side of the top surface from a junction of the top surface and the pair of inclined surfaces.