Patent ID: 8286351

Claim:
A manufacturing method of a liquid discharge head including a substrate in which a first energy generating element and a second energy generating element that generate energy used for discharging liquid are provided, a discharge port member in which a first discharge port discharging the liquid is provided corresponding to the first energy generating element and a second discharge port discharging the liquid is provided corresponding to the second energy generating element, and a flow path wall member having a portion of a liquid flow path wall that communicates with the first discharge port and the second discharge port, in which a distance between the second energy generating element and the second discharge port is larger than that between the first energy generating element and the first discharge port, the method comprising: providing a first layer, which becomes a first portion of the discharge port member, on the flow path wall member of the substrate on which the flow path wall member is provided; forming the first portion by forming the first discharge port, an opening corresponding to the second discharge port, and a slot on the first layer by removing a portion of the first layer; providing a second layer, which becomes a second portion of the discharge port member, on the first portion, so as to cover the first discharge port and the opening and embed the slot; and forming the discharge port member by removing a portion of the second layer to expose the first discharge port and to form the second discharge port in a position that corresponds to the opening.