Importance

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Abstract

An ink jet recording head which includes a substrate for ink jet recording head and a nozzle structural body provided with a plurality of nozzle-forming walls which is disposed over said substrate for ink jet recording head, said substrate for ink jet recording head comprising a base member, a heat generating resistor capable of generating, upon energization, thermal energy to be utilized for discharging ink, a pair of electrodes electrically connected to said heat generating resistor, a first protective layer, and a second protective layer wherein said heat generating resistor and said pair of electrodes are arranged on said base member, and said first protective layer and said second protective layer are disposed in this order over said heat generating resistor and said pair of electrodes, wherein a plurality of given portions of said second protective layer each situated at a position where said nozzle structural body is joined through one of said nozzle-forming walls to said substrate for ink jet recording head are recessed while leaving opposite stepped portions of said second protective layer situated above said pair of electrodes. A ink jet recording apparatus provided with said ink jet recording head.

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First Claim