A recording head is equipped with a plurality of liquid discharge portions, each having a discharge opening for discharging ink, and a substrate. The substrate is provided with a plurality of electrothermal transducers for generating thermal energy to be utilized for discharging the ink supplied to the...http://www.google.de/patents/US5182577?utm_source=gb-gplus-sharePatent US5182577 - Ink jet recording head having an improved substance arrangement device
