Patent ID: 6257695
Filing Date: 2001-07-10
Classification: B41J

Abstract:
A substrate for a thermal recording head for performing recording by emitting an ink by utilizing heat, comprising:a plurality of heating resistor elements for generating heat to perform recording, each said heating resistor element having a width W.sub.1, a length l.sub.1 and a thickness t.sub.1 ;a plurality of wiring electrodes electrically connected for supplying driving signals to said heating resistor elements; anda measurement resistor element which is electrically independent from said heating resistor elements and is arranged so that a resistance value of said measurement resistor element can be measured, said measurement resistor element having a width W.sub.3, a length l.sub.3 and a thickness t.sub.3,wherein l.sub.1 /W.sub.1 <l.sub.3 /W.sub.3 is satisfied and said thickness t.sub.1 is substantially the same as said thickness t.sub.3.