| 摘要 |
The present invention provides an ink jet recording head in which the degree of freedom in the design of the arranged position of an electric signal input-output terminal is enhanced, its manufacturing method and an ink jet recording device, the invention is characterized as follows. The ink jet recording head is formed by laminating a heater element substrate in which a heater element and others are arranged and a passage substrate in which nozzles and others are formed. When the nozzles and others are formed by etching in the passage substrate, a cut-out portion for exposing an electric signal input-output terminal of the heater element substrate is also formed. Therefore, the degree of freedom in the design of the shape and the position of the cut-out portion in the head chip is enhanced. It is possible to prevent a hydrophobic agent from adhering to the electric signal input-output terminal to result in electric connection failure if hydrophobic treatment is applied to a nozzle forming plane by forming the head chip so that the electric signal input-output terminal is not exposed at least on the side of the nozzle forming plane owing to the cut-out portion.
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