Patent ID: 7980675

Claim:
An ink jet head comprising: a substrate having an energy generating element for generating energy for ejecting ink through an ejection outlet, and an ink supply port for supplying the ink to said ejection outlet; a chamber portion with said energy generating element provided therein; and a flow path portion which provides fluid communication between said supply port and said chamber, wherein said flow path portion includes a near portion which is relatively near to said substrate with respect to a reference direction that is perpendicular to said substrate and parallel to a direction of flow of the ink from said chamber to said ejection outlet, and a remote portion which is relatively remote from said substrate with respect to the reference direction, and a width of the near portion is different from a width of the remote portion in a sectional plane perpendicular to the direction of flow of the ink in said flow path portion, and wherein a stepped portion is provided between the near portion and the remote portion.