Inkjet prtinthead and method of manufacturing the same

A method of manufacturing an inkjet printhead, comprising:

• forming a chamber layer on a substrate;
• forming an ink feed hole on the substrate;
• forming a nozzle layer comprising a plurality of nozzles on the chamber layer;
• and
• forming an ink chamber and a restrictor through the ink feed hole,
• wherein the chamber layer and the nozzle layer are respectively formed of cured products of a first negative photoresist composition and a second negative photoresist composition,
• wherein the first negative photoresist composition and the second negative photoresist composition comprise a bisphenol-A novolac epoxy resin represented by Formula 1;
• at least one epoxy resin selected from a first epoxy resin represented by Formula 2;
• and a second epoxy resin represented by Formula 3;
• a cationic photoinitiator;
• and a solvent:
• wherein k, p, n and m are each independently an integer of 1 to 30;
• and
• wherein R1 through R24 are each independently a hydrogen atom, a halogen atom, a hydroxyl group, an amino group, a nitro group, a cyano group, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-C20 carboxyl group, a substituted or unsubstituted C1-C20 alkylsiloxane group, a substituted or unsubstituted C1-C20 alkoxy group, a substituted or unsubstituted C2-C20 alkenyl group, a substituted or unsubstituted C2-C20 alkynyl group, a substituted or unsubstituted C1-C20 heteroalkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C7-C30 arylalkyl group, a substituted or unsubstituted C5-C30 heteroaryl group, or a substituted or unsubstituted C3-C30 heteroarylalkyl group.

A method of manufacturing an inkjet printhead, comprising:

• forming a chamber layer on a substrate;
• forming a nozzle layer comprising a plurality of nozzles on the chamber layer;
• forming an ink feed hole on the bottom surface of the substrate;
• and
• forming an ink chamber and a restrictor through the ink feed hole,
• wherein the chamber layer and the nozzle layer are formed of cured products of a first negative photoresist composition and a second negative photoresist composition,
• wherein the first negative photoresist composition and the second negative photoresist composition comprise a bisphenol-A novolac epoxy resin represented by Formula 1;
• at least one epoxy resin selected from a first epoxy resin represented by Formula 2;
• and a second epoxy resin represented by Formula 3;
• a cationic photoinitiator;
• and a solvent:
• wherein k, p, n and m are each independently an integer of 1 to 30;
• and
• wherein R1 through R24 are each independently a hydrogen atom, a halogen atom, a hydroxyl group, an amino group, a nitro group, a cyano group, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-C20 carboxyl group, a substituted or unsubstituted C1-C20 alkylsiloxane group, a substituted or unsubstituted C1-C20 alkoxy group, a substituted or unsubstituted C2-C20 alkenyl group, a substituted or unsubstituted C2-C20 alkynyl group, a substituted or unsubstituted C1-C20 heteroalkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C7-C30 arylalkyl group, a substituted or unsubstituted C5-C30 heteroaryl group, or a substituted or unsubstituted C3-C30 heteroarylalkyl group.