Patent ID: 7918536
Filing Date: 2011-04-05
Classification: B41J

Abstract:
1. An ink jet head comprising: a recording element substrate including a plurality of ink supply ports and a supply port partition between adjacent ink supply ports; a substrate supporting portion which supports the recording element substrate at a back side thereof, wherein the substrate supporting portion includes ink supply passages corresponding to the ink supply ports and a supply passage partition corresponding to the supply port partition; a sealing material contacted to a side surface of the recording element substrate and to the substrate supporting portion; first adhesive material fixes the supply port partition and the supply passage partition to each other, wherein back sides of opposite ends of the recording element substrate with respect to an arranging direction of the ink supply ports are unfixed by the first adhesive material to the substrate supporting portion; and wherein a second adhesive material having an adhesivity lower than the first adhesive material is applied between the back sides of the opposite ends of the recording element substrate and said substrate supporting portion, which are unfixed from each other by the first adhesive material.