LIQUID DROP EJECTION HEAD AND INK JET RECORDER

摘要

PROBLEM TO BE SOLVED: To provide an ink jet recorder having a high ejection efficiency in which variation in the ejection characteristics is suppressed by increasing the rigidity through use of a nozzle forming member having a laminate structure in order to eliminate incomplete ejection due to low rigidity and low ejection efficiency when a polyimide resin member is used as the nozzle forming member. SOLUTION: The nozzle forming member comprises a laminate member of a resin member 71 having a nozzle and a high rigidity member 72 having an opening 74 communicating with the nozzle wherein a channel forming member and the high rigidity member 72 being bonded thereto have substantially identical coefficients of linear thermal expansion. The channel forming member is preferably formed of silicon. The high rigidity member 72 is preferably formed of silicon or kovar material or ferronico material.