Morgan, Lewis & Bockius LLP
Ink jet recording head, ink jet recording device and head manufacturing method
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.
Fuji Xerox Co., Ltd.
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Yoshihisa Masaki Michiaki Kenji
Ueda Kataoka Murata Yamazaki