Patent ID: 8749602

Claim:
A method of manufacturing a thermal head, comprising: bonding a support substrate and an upper substrate, which have a flat shape, together in a laminated state, the support substrate and the upper substrate having opposed surfaces, at least one of which includes a concave portion; thinning the upper substrate bonded onto the support substrate in the bonding; measuring a thickness of the upper substrate thinned in the thinning; determining a target resistance value of a heating resistor from the following expression based on the thickness of the upper substrate measured in the measuring; and forming the heating resistor having the target resistance value determined in the determining on a surface of the upper substrate thinned in the thinning at a position opposed to the concave portion, Rh=R 0×(1+( D 1 +D 0)/( D 0 +K )) (1) where Rh represents the target resistance value; R 0 , a design resistance value; D 1 , the thickness of the upper substrate; D 0 , a design thickness of the upper substrate; and K, a heating efficiency coefficient.