Patent ID: 6485130
Filing Date: 2002-11-26
Classification: B41J,C08J,C09J,G03F,Y10T

Abstract:
An ink jet printhead which comprises (i) an upper substrate with a set of parallel grooves for subsequent use as ink channels and a recess for subsequent use as a manifold, the grooves being open at one end for serving as droplet emitting nozzles, (ii) a lower substrate in which one surface thereof has an array of heating elements and addressing electrodes formed thereon, at least a portion of said surface comprising metal, plasma nitride, silicon, or glass, and (iii) an insulative layer deposited on the surface of the lower substrate and over the heating elements and addressing electrodes and patterned to form recesses therethrough to expose the heating elements and terminal ends of the addressing electrodes, the upper and lower substrates being aligned, mated, and bonded together to form the printhead with the grooves in the upper substrate being aligned with the heating elements in the lower substrate to form droplet emitting nozzles, said insulative layer comprising a crosslinked or chain extended polymer wherein the crosslinking or chain extension is at least partly through photosensitivity-imparting substituents; said insulative layer being bonded to the surface of the lower substrate with an adhesion promoter selected from silanes, titanates, or zirconates having (a) alkoxy, aryloxy, or arylalkyloxy functional groups and (b) functional groups including at least one photosensitive aliphatic >C&boxH;C< linkage.