US 8,147,037 B2 · Inkjet printhead and method of manufacturing the same

Abstract

Provided are an inkjet printhead and a method of manufacturing the same. The inkjet printhead includes a substrate which includes an ink feed passage, a chamber layer, which is disposed on the substrate and a plurality of ink chambers in which ink supplied from the ink feed passage is filled. It also includes a nozzle layer, which is disposed in the chamber layer and includes a plurality of nozzles through which the ink is ejected. The chamber layer and the nozzle layer are cured products of a first negative photoresist composition and a second negative photoresist composition. Each of the first negative photoresist composition and the second negative photoresist composition includes an epoxidized multifunctional bisphenol B novolak resin, a cationic optical initiator, and a solvent.

Claims20

Dependent claims

An inkjet printhead comprising:

a substrate having at least one ink feed passage;
a chamber layer disposed above the substrate, the chamber layer comprised of a cured product of a first negative photoresist composition, the chamber layer having at least one ink chamber in communication with the ink feed passage;
and
a nozzle layer disposed above the chamber layer, the nozzle layer comprised of a cured product of a second negative photoresist composition, the nozzle layer having at least one nozzle in communication with the ink chamber, the nozzle configured to eject ink,
wherein the first negative photoresist composition and the second negative photoresist composition comprise an epoxidized multifunctional bisphenol B novolak resin, a cationic optical initiator, and a solvent.

2 more elements

A method of manufacturing an inkjet printhead, the method comprising:

forming a chamber layer on a substrate by curing a first negative photoresist composition comprising an epoxidized multifunctional bisphenol B novolak resin, a cationic optical initiator, and a solvent;
forming a nozzle layer by curing a second negative photoresist composition comprising an epoxidized multifunctional bisphenol B novolak resin, a cationic optical initiator, and a solvent, the nozzle layer comprising a plurality of nozzles;
forming an ink feed passage in a rear surface of the substrate;
and
forming an ink chamber and a restrictor in communication with the ink feed passage.

2 more elements

A method of manufacturing an inkjet printhead, the method comprising:

providing a substrate;
providing at least one chamber material layer above the substrate, the chamber material layer comprising a first negative photoresist composition comprised of an epoxidized multifunctional bisphenol B novolak resin, a cationic optical initiator, and a solvent;
forming at least one exposure portion of the chamber material layer and at least one non-exposure portion of the chamber material layer;
forming at least one chamber layer having at least one ink chamber by removing the non-exposure portion;
forming at least one nozzle material layer above the chamber layer, the nozzle material layer comprising at least one second photoresist composition comprised of an epoxidized multifunctional bisphenol B novolak resin, a cationic optical initiator, and a solvent;
forming at least one exposure portion of the nozzle material layer and at least one non-exposure portion of the nozzle material layer;
forming at least one nozzle layer having at least one nozzle in communication with the chamber by removing the non-exposure portion;
and
forming at least one ink feed passage in the substrate such that the ink feed passage is in communication with the at least one chamber.

6 more elements

Dependencies are inferred from the claim text.

Inkjet printhead and method of manufacturing the same

Life of this patent

Inkjet printhead and method of manufacturing the same

Life of this patent

Abstract

Claims20