Liquid jet recording head

摘要

A liquid jet recording head comprises a substrate comprising a support, a resistive heater layer, electrodes electrically connected with the resistive heater layer, a portion of the resistive heater layer located between the electrodes being an electrothermal transducer, and an upper layer comprising a first protective layer comprising an inorganic insulating material, a second protective layer comprising an inorganic material, and a third protective layer comprising an organic material, wherein and the second protective layer and the third protective layer overlap each other in the vicinity of a portion where heat is generated by the electrothermal transducer and the overlapping width of the second protective layer and the third protective layer ranges from 10 mu m to 500 mu m. In another embodiment, the second protective layer extends along plural liquid flow paths for substantially less than the length thereof in a continuous strip that covers adjacent transducers.