Method of making thermal print head

A method of manufacturing a thermal print head that comprises a substrate, a common electrode having a plurality of extensions, a plurality of individual electrodes each paired with a respective one of the extensions of the common electrode, and a plurality of resistors each bridging between the respective extension of the common electrode and the paired individual electrode, the method comprising:

• forming on the substrate a patterned conductor layer including the common electrode and the individual electrodes, each of the extensions included in the common electrode being initially connected to a respective one of the individual electrodes;
• removing a predetermined part of the conductor layer to provide a split portion for separating each of the extensions from the respective individual electrode;
• and
• forming a resistor at the split portion of the conductor layer for bridging between each of the extensions and the respective individual electrode;
• wherein a first measurement step is performed to measure an electrical resistance between a first measurement point corresponding to the common electrode and a second measurement point corresponding to each of the individual electrodes before removal of the predetermined part of the conductor layer;
• and
• wherein a second measurement step is performed to measure an electrical resistance between the first measurement point and the second measurement point after the removal of the predetermined part of the conductor layer but before the formation of the resistor.