Ink jet recording head and producing method for the same

A method for producing an ink jet recording head including:

• a plurality of recording element substrates each including a recording element for generating energy to be used for ink discharge and an electrode portion connected to said recording element;
• a wiring substrate provided with electrode terminals to be electrically connected with said electrode portions of said plural recording element substrates, respectively, and adapted to transmit an electrical pulse for ink discharge to said recording elements, respectively;
• an element substrate support member for supporting said plural recording element substrates;
• and
• a wiring substrate support member for supporting said wiring substrate and to be fixed on said element substrate support member, the method comprising, in this order:
• a step of fixing said plural recording element substrates and said wiring substrate support member on said element substrate support member;
• a step of fixing said wiring substrate on said wiring substrate support member with said electrode terminals of said wiring substrate being aligned with respect to said electrode portions of said plural recording element substrates, respectively;
• and
• a step of executing metal—metal bonding between said electrode portions of said plural recording element substrates and said electrode terminals of said wiring substrate, respectively.

An ink jet recording head comprising:

• a first recording element substrate including plural first recording elements arranged with a first element arrangement pitch and adapted to generate energy to be used for ink discharge and plural first electrode portions arranged with a first electrode arrangement pitch and connected respectively to said plural first recording elements;
• a second recording element substrate including plural second recording elements arranged with a second element arrangement pitch and adapted to generate energy to be used for ink discharge and plural second electrode portions arranged with a second electrode arrangement pitch and connected respectively to said plural second recording elements;
• and
• a wiring substrate including plural first electrode terminals electrically connected to said plural first electrode portions and plural second electrode terminals electrically connected to said plural second electrode portions,
• wherein said first element arrangement pitch is larger than said second element arrangement pitch and said first electrode arrangement pitch is smaller than said second electrode arrangement pitch.

An ink jet recording head comprising:

• plural recording element substrates each including a recording element adapted to generate energy to be used for ink discharge and an electrode portion connected to said recording element;
• a wiring substrate including electrode terminals electrically connected to said electrode portions of said plural recording element substrates, respectively, and adapted to transmit an electric pulse for ink discharge to said recording elements, respectively;
• and
• an element substrate support member for supporting said plural recording element substrates,
• wherein, on said element substrate support member, said electrode portions of said plural recording element substrates are not positioned in a mutually same height and said electrode portions of said plural recording element substrates and said electrode terminals of said wiring substrate are metal—metal bonded, respectively.