Injection head manufacturing method and injection head

A manufacturing method of an inkjet head having a head chip wherein channels and drive walls configured with piezoelectric elements are arranged alternately, apertures of the channels are arranged respectively at a front surface and a rear surface of the head chip, a drive electrode is formed in each channel, and a flow path regulating member arranged at the rear surface of the head chip to regulate ink flow into the channel, wherein shear deformation is caused at the drive wall by applying a voltage so that ink in the channel is emitted, the manufacturing method comprising:

• adhering a photosensitive resin film by heat and pressure onto the rear surface of the head chip without using adhesives;
• covering the photosensitive resin film by a photo mask having openings in shape of a predetermined pattern;
• exposing and developing the photosensitive resin film covered by the photo mask so as to form the flow path regulating member;
• coating both surfaces of the flow path regulating member by coating the head chip with a film made of paraxylylene and derivatives thereof after forming the flow path regulating member;
• and
• adhering a nozzle plate onto a front surface of the head chip afterward.