Patent ID: 8469489

Claim:
An inkjet print head having a plurality of grooves each comprising a pressure chamber, a nozzle plate comprising a plurality of nozzles formed by a laser process, the nozzle plate covering an opening of each of the pressure chambers and each pressure chamber communicating with a respective nozzle, a plurality of pressure generating parts each causing ink within the respective pressure chamber to be ejected from the associated nozzle, a top board covering the grooves so as to form the individual pressure chambers, an ink supplying port supplying ink to the pressure chambers, and a plurality of electrodes each formed on an internal surface of each of the respective pressure chambers for supplying a drive pulse to the respective pressure generating parts, the inkjet print head comprising: a first protecting film comprised of an inorganic insulating material having a predetermined thickness partially formed on each electrode; and a second protecting film comprised of an organic insulating material formed on the first protecting film and on a portion of the electrode which is not covered by the first protecting film, the second protecting film having a plurality of laser-damaged holes in which the organic insulating material has been partially removed when the nozzles were formed by the laser process, the laser-damaged holes exposing a portion of the first protecting film, wherein the first protecting film has an area larger than the laser damaged hole.