Patent ID: 7250960

Claim:
A thermal head, comprising: a head substrate having a resistor, a longitudinal axis and a width normal to the longitudinal axis; a heat-dissipation plate having a longitudinal axis and a width normal to the longitudinal axis; an adhesive layer formed between the head substrate and the heat dissipation plate, the adhesive layer having a first thickness portion and a second thickness portion, the first thickness portion being thicker than the second thickness portion; a first recess portion formed in the head substrate or the heat-dissipation plate and extending substantially across the width thereof; a second recess portion formed in the head substrate or the heat-dissipation plate and extending substantially across the width thereof the second recess portion separated from the first recess portion along the longitudinal axes; and the first and second recess portions corresponding to the first thickness portion of the adhesive layer and an area between the first and second recess portions corresponding to the second thickness portion of the adhesive layer.