Method of manufacturing a substrate for a liquid jet recording head, substrate manufactured by the method, liquid jet recording head formed by use of the substrate, and liquid jet recording apparatus having the head

A method of manufacturing an ink jet recording head, the head including a substrate and a member having a recessed portion for forming an ink path by bonding the member to the substrate, the substrate having a support member and an electro-thermal transducer provided on the support member, the electro-thermal transducer having a heat generating resistance layer and electrodes connected to said heat generating resistance layer, said method comprising the steps of:

• cutting a short-circuited wiring portion of the electrodes;
• embedding a filler into a recess created in the support member in said cutting step;
• and
• providing a protective layer on the embedded filler and the electrodes.

An ink jet recording head including:

• a substrate;
• and
• a member having a recessed portion forming an ink path by bonding said member to said substrate, wherein said substrate has a support member and an electro-thermal transducer provided on said support member, said electrothermal transducer having a heat generating resistance layer and electrodes connected to said heat generating resistance layer, said substrate having a filler embedded in a recess over which a protective layer is provided, and wherein said recording said is manufactured by the steps of:
• cutting a short-circuited wiring portion of said electrodes;
• embedding the filler into the recess created in said support member in said cutting step;
• providing the protective layer on the embedded filler and said electrodes;
• and
• attaching said substrate to said member having the recessed portion.

An ink jet recording apparatus comprising:

• an ink jet recording head including a substrate, and a member having a recessed portion for forming an ink path by bonding said member to said substrate, wherein said substrate has a support member and an electro-thermal transducer provided on said support member, said electrothermal provided on said support member, said electrothermal transducer having a heat generating resistance layer and electrodes connected to said heat generating resistance layer, said substrate having a filler embedded in a recess over which a protective layer is provided;
• and
• conveying means for conveying a recording medium for recording by the ink jet recording head, wherein said recording apparatus is manufactured by the steps of:
• cutting a short-circuited wiring portion of said electrodes;
• embedding the filler into the recess created in said support member in said cutting step;
• providing the protective layer on the embedded filler and said electrodes;
• attaching said substrate to said member having a recessed portion;
• and
• positioning said recording head adjacent said conveying means.

A substrate for a liquid jet recording head provided with a support member and an electro-thermal transducer provided on the support member, the electrothermal transducer having a heat generating resistance layer and electrodes connected to the heat generating resistance layer, said substrate having a filler embedded in a recess over which a protective layer is provided, wherein said substrate is manufactured by the steps of:

• cutting a short-circuited wiring portion of the electrodes;
• embedding the filler into the recess created in the support member in said cutting step;
• and
• providing a protective layer on the embedded filler and the electrodes.