| 摘要 |
There is disclosed a substrate for use in an ink jet recording head, comprising on a base member an insulating film comprising an insulating material, a bubble-generating heater for generating heat required for bubble generation in ink, and a preheating heater for generating heat to be applied to a recording head for effecting recording on a recording medium, wherein the preheating heater is provided in a layer lower than that of the bubble-generating heater with interposition of the insulating film.
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