Patent ID: 7410240

Claim:
An inkjet recording head, comprising: a pressure chamber communicating with an ink supply port and an ink discharge port; a first supply path which supplies an ink to the pressure chamber via the ink supply port; an orifice plate including the ink discharge port, at least an inner wall of the ink discharge port being made from a porous member capable of being impregnated with the ink; a second supply path which supplies the ink to the porous member; and a pressure control device which controls pressure of the ink to satisfy P 1 <P 2 ≦P 0 , where P 1 is the pressure of the ink at a meniscus surface inside the ink discharge port, the ink being supplied from the first supply path, P 2 is the pressure of the ink at a surface of the porous member forming the inner wall of the ink discharge port, the ink being supplied to the porous member from the second supply path, and P 0 is an atmospheric pressure.