Abstract: The photoresist barrier layer of an inkjet printer printhead is processed to enable channels narrower than a predetermined width in the barrier layer to be created without blockage. Relatively large volumes of photoresist which form a wall of the channel are exposed to a partial exposure of electromagnetic radiation to yield a reduced concentration of photoresist barrier layer in the large volume.

Abstract: The photoresist barrier layer of an inkjet printer printhead is processed to enable channels narrower than a predetermined width in the barrier layer to be created without blockage. Relatively large volumes of photoresist which form a wall of the channel are exposed to a partial exposure of electomagnetic radiation to yield a reduced concentration of photoresist barrier layer in the large volume.

Abstract: A method is provided for preparing the surface of a cured cyanate ester resin or composite for metal plating. The composite may comprise graphite fibers embedded in a cured cyanate ester resin matrix The surface is treated with a preheated solution containing an alkali metal salt of an alkoxide. Preferred alkoxides are methoxide, ethoxide, propoxide, isopropoxide, butoxide, tert-butoxide, sec-tutoxide, 2- methyl-2-butoxide, pentoxide and hexoxide. The method of the invention operates to improve adhesion between the treated surface and a subsequently plated metal, such that the resulting cured cyanate ester resin or composite may replace certain metallic components in such applications as aircraft, spacecraft, and automobiles given its highly conductive metallic coating.