Method of manufacturing liquid discharge head and liquid discharge head

A method of manufacturing a liquid discharge head, wherein the liquid discharge head comprises a flow-path unit and a piezoelectric actuator unit, the flow-path unit comprising a liquid flow path comprising a plurality of discharge openings and a plurality of pressure chambers which open at a surface of the flow-path unit and correspond to the plurality of discharge openings, the actuator unit comprising a plurality of actuators which apply pressure to liquid in the pressure chambers, the method comprising steps of:

• positioning the actuator unit to oppose the surface of the flow-path unit while extending on the plurality of pressure chambers;
• forming a particular film on a surface of a supporting member that supports the particular film such that a pattern which includes areas of the surface of the flow-path unit corresponding to openings of the plurality of pressure chambers is formed, wherein the particular film is impermeable relative to the liquid;
• and
• securing the particular film to the surface of the flow-path unit, the securing step comprising the steps of:
• placing the supporting member having the particular film formed thereon on the flow-path unit;
• and
• aligning the supporting member such that a surface of the particular film on a side opposite to the supporting member opposes the surface of the flow-path unit while the openings of the plurality of pressure chambers are covered.