Patent ID: 8257599
Filing Date: 2012-09-04
Classification: B41J

Abstract:
1. A thermal head manufacturing method, comprising: a concave portion forming step of forming at least one concave portion on one face of a supporting substrate; an upper substrate forming step of forming an upper substrate comprised of a first layer and a second layer stacked together in a substrate thickness direction, the first layer having a first etching rate and the second layer having a second etching rate lower than the first etching rate; a bonding step of bonding the one face of the supporting substrate in which the concave portion has been formed in the concave portion forming step to a surface on a side of the second layer of the upper substrate; a thinning step of etching the first layer of the upper substrate after the bonding step until the second layer is reached; and a heating resistor forming step of forming at least one heating resistor on the upper substrate which has been thinned in the thinning step so as to be disposed over the concave portion of the supporting substrate.