Liquid jet recording head

摘要

A liquid jet recording head comprises a liquid discharge portion including an orifice for discharging a liquid to form a flying liquid droplet and a liquid flow path communicating with the orifice having a heat applying portion to apply thermal energy to the liquid to form the liquid droplet, and an electro-thermal transducer including at least a pair of opposing electrodes electrically connected to a heat generating resistive layer formed on a base and a heat generating portion formed between the electrodes. A first upper protection layer of an inorganic insulative material and a second upper protection layer of an organic material are laminated on at least the electrodes, and the first upper protection layer and a third upper protection layer of an inorganic material different from that of the first upper protection layer are laminated in this order on at least the heat generating portion.