Manufacturing method for a thermal head

Abstract

Provided is a manufacturing method for a thermal head, which includes: a concave portion forming step of forming a plurality of concave portions on a surface of a collective substrate; a bonding step of thermally fusion bonding an insulating film to the surface of the collective substrate including the plurality of concave portions formed thereon in the concave portion forming step; and a heating resistor forming step of forming a plurality of heating resistors on the insulating film so as to be opposed to the plurality of concave portions, in which the concave portion forming step includes setting any one of the plurality of concave portions as a reference, and setting sizes of the plurality of concave portions other than the any one of the plurality of concave portions so as to become larger as a distance from the any one thereof increases.

Dependencies are inferred from the claim text.