Apparatus of fabricating and method of fabricating liquid ejection head, and liquid ejection head

A method of fabricating a liquid ejection head including:

• a pressure generating chamber forming plate that is made of a metal, that has groove-like recess portions aligned to form pressure generating chambers and that is formed with communication ports penetrated in a plate thickness direction at one ends of the groove-like recess portions;
• a nozzle plate bored with nozzle openings at positions in correspondence with the communication ports and a sealing plate that is made of a metal and that is for sealing opening faces of the groove-like recess portions, the liquid ejection head being constituted by bonding the sealing plate to a side of the pressure generating chamber forming plate where the groove-like recess portions are formed and also bonding the nozzle plate to an opposite side of the pressure generating chamber forming plate, the method comprising the steps of:
• preparing a first die including projected streak portions aligned in parallel by a predetermined pitch and gap portions formed between the adjacent projected streak portions, wherein each of the projected streak portions includes:
• an inner wall forming portion for forming an inner wall of the corresponding groove-like recess portion extending in a depth direction of the corresponding groove-like recess portion;
• a connecting face portion;
• and an inclined face portion, continuous via the connecting face portion to the inner wall forming portion, for forming a bottom portion of the corresponding groove-like recess portion into a substantially V-like shape;
• and
• preparing a second die;
• and
• pressing the projected streak portions of the first die to a metal plate to form the groove-like recess portions, while supporting the metal plate by the second die.