Patent ID: 8186809

Claim:
A liquid discharging head comprising: a rectangular recording element substrate having, on a main surface thereof, electrothermal transducers for generating thermal energy used for discharging a liquid, first electrodes for supplying electrical signals to the electrothermal transducers and second electrodes not used for supplying electrical signals to the electrothermal transducers; and a wiring sheet having an opening through which the recording element substrate is exposed, the wiring sheet being provided with a first wiring pattern connected to the first electrodes and a second wiring pattern connected to the second electrodes, wherein a plurality of the first electrodes are formed along a first side of the recording element substrate having a predetermined length and a plurality of the second electrodes are formed along a second side of the recording element substrate, the second side being longer than the first side and extending in a direction transverse to the first side.