Patent ID: 6318843
Filing Date: 2001-11-20
Classification: B41J

Abstract:
An inkjet printer printhead, comprising:a barrier layer with an ink channel;a first substrate disposed on a first side of said barrier layer, said first substrate including at least one electrode; anda second substrate disposed on a second side of said barrier layer opposite said first substrate, said second substrate including a front surface and an opposite back surface and at least one conductive trace on the back surface, said second substrate further comprising:a bonding aperture extending through said second substrate and said barrier layer to expose said first substrate without entering said ink channel, and to expose a portion of said at least one conductive trace and a portion of said at least one electrode;a single application of encapsulating adhesive applied only from the front surface of said second substrate and only through said bonding aperture, said encapsulating adhesive completely encapsulating only said bonding aperture, said portion of said at least one conductive trace and said portion of said at least one electrode; andat least one fluid accumulation channel excavated into a second side of said second substrate between said bonding aperture and said ink channel with a portion of said at least one fluid accumulation channel extending over said first substrate, said at least one fluid accumulation channel receiving a flow of said encapsulating adhesive in only one direction from said bonding aperture towards said ink channel to substantially minimize said flow of said encapsulating adhesive past said at least one fluid accumulation channel to said ink channel.