Patent ID: 8162440
Filing Date: 2012-04-24
Classification: B41J,Y10T

Abstract:
1. An inkjet printhead, comprising: a substrate having an ink feed hole; a chamber layer formed on the substrate, wherein the chamber layer comprises a plurality of ink chambers in which ink supplied from the ink feed hole is filled; and a nozzle layer formed on the chamber layer, wherein the nozzle layer comprises a plurality of nozzles through which ink is ejected, 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 R