Patent ID: 8454129

Claim:
A liquid ejection recording head comprising: a recording element substrate including an ejection energy generation element and a plurality of electrode pads, the ejection energy generation element being configured to generate ejection energy by which to eject a liquid; and an electric wiring substrate including a plurality of lead electrodes connected to corresponding electrode pads to apply an electric signal to the ejection energy generation element, wherein one or more of the plurality of electrode pads are not connected to any lead electrode, and the plurality of lead electrodes include first lead electrodes, each of which being connected to each of electrode pads located at both sides of an electrode pad of the one or more of the plurality of electrode pads not connected to any lead electrode, and wherein each of the first lead electrodes has a wide part whose width is greater than the width of the other lead electrodes and has a narrow part that is directly connected to the electrode pad, the narrow part whose width is smaller than the wide part.