Patent ID: 7414641
Filing Date: 2008-08-19
Classification: B41J

Abstract:
1. A method of manufacturing a thermal head having a head substrate on which a plurality of heating elements is arranged in a longitudinal direction thereof, comprising: mounting a control unit on a print substrate so as to control heat emission of the heating elements; and covering the control unit, a cross section of the print substrate, and a cross section of the head substrate with a sealing resin; wherein the print substrate and the head substrate are mounted on a head mounting, and both ends of the head substrate in a longitudinal direction are warped in a direction away from the cross section of the print substrate when the sealing resin is cured; a central portion of the head substrate in a longitudinal direction is warped in a direction away from the cross section of the print substrate when the heating elements emit heat, and a curing condition when curing the sealing resin is such that the convex-shaped warpage of the head substrate occurring when the sealing resin is cured is offset by the concave-shaped warpage of the head substrate when the heating elements emit heat.