B-stage film adhesive compatible with aqueous ink for printhead structures interstitial bonding in high density piezo printheads fabrication for aqueous inkjet

摘要

A method for forming an ink jet printhead comprises processing an epoxy adhesive such that negative effects from physical contact with particular inks are reduced or eliminated. Conventional adhesives processed using conventional techniques are known to gain weight and squeeze out when exposed to certain inks such as ultraviolet inks, solid inks, and aqueous inks. An embodiment of the present teachings can include processing of a particular adhesive such that the resulting epoxy adhesive is suitable for printhead applications.

主权项

1. A method for forming an ink jet printhead, comprising:
heating a first surface of a first substrate to a temperature of between 40° C. and 120° C.; contacting the heated first surface of the first substrate with a first surface of an epoxy adhesive to tack the epoxy adhesive to the first surface of the first substrate; moving a roller across either a release liner on a second surface of the epoxy adhesive or a second surface of the first substrate to remove air bubbles at an interface between the first surface of the epoxy adhesive and the first surface of the first substrate; cooling the first substrate and the epoxy adhesive to a temperature of 22° C. or less; then heating a first surface of a second substrate to a temperature of between 40° C. and 120° C.; with the epoxy adhesive tacked to the first surface of the first substrate, contacting the heated first surface of the second substrate with the second surface of the epoxy adhesive to tack the epoxy adhesive to the first surface of the second substrate; moving a roller across a second surface of the second substrate to remove air bubbles at an interface between the second surface of the epoxy adhesive and the first surface of the second substrate; then after tacking the epoxy adhesive to the first substrate and the second substrate, partially curing the epoxy adhesive by heating the first substrate, the second substrate, and the epoxy adhesive to a temperature of between about 80° C. and about 140° C. for a duration of between about 10 minutes and about 20 minutes; after partially curing the epoxy adhesive, fully curing the epoxy adhesive by heating the first substrate, the second substrate, and the epoxy adhesive within a press to a temperature of between 100° C. and 300° C. for a duration of between 20 minutes and 200 minutes and at a pressure of between 40 psi and 100 psi; filling the ink jet printhead with an aqueous ink and exposing the fully cured epoxy adhesive to the aqueous ink.