Thermal print head and method for manufacturing thereof

A method of manufacturing a thermal print head, comprising:

• providing a substrate;
• forming a glaze layer on the substrate;
• forming a wiring layer on the glaze layer;
• forming a heat element on the glaze layer;
• and
• forming a protective layer on the glaze layer to cover the wiring layer and the heat element, wherein
• the wiring layer has a common electrode and a plurality of individual electrodes,
• the common electrode has protrusions arranged in intervals along a first direction in a plan view and extending along a second direction perpendicular to the first direction in the plan view,
• the plurality of individual electrodes have tip portions extending along the second direction,
• the protrusions and the tip portions are alternately arranged in intervals along the first direction in the plan view,
• the heat element extends along the first direction in the plan view and is disposed on the glaze layer while overlapping with the protrusions and the tip portions,
• the protective layer is disposed on the glaze layer to cover the wiring layer and the heat element,
• a recess is formed on a surface of the protective layer, and
• the recess extends along the first direction in a manner of overlapping with the heat element in the plan view.