Patent ID: 6830646
Filing Date: 2004-12-14
Classification: B41J,C08G,G03F

Abstract:
A method for making an ink jet pen for an ink jet printer comprising applying a resin layer containing radiation curable resin formulation to a surface of a semiconductor chip containing resistive and conductive layers on the surface thereof to provide a cured resin layer having a thickness ranging from about 1 to about 5 microns, the radiation curable resin formulation including a multifunctional epoxy component, a difunctional epoxy component having a weight average molecular weight above about 2500, a silane coupling agent, an aryl sulfonium salt photoinitiator, a non-photoreactive solvent, and the resin formulation being substantially devoid of acrylate polymer components, removing solvent from the resin layer, curing the resin layer by exposure to actinic radiation to provide a cured resin layer, aligning and attaching a nozzle plate to the semiconductor chip with an adhesive to provide a nozzle plate/chip assembly, and attaching a TAB circuit or flexible circuit to the nozzle plate/chip assembly, wherein the cured resin layer contains from about 60 to about 85 weight percent of the difunctional epoxy component and from about 12 to about 22 weight percent of the photoinitiator.