Abstract:
Radiation sensitive compositions, processes for using the compositions, and articles of manufacture comprising the compositions. The photoimageable compositions of the invention comprises a radiation sensitive component, a resin binder and a polybutadiene that comprises one or more internal epoxide groups. In preferred aspects, the compositions off the invention further comprise a crosslinking agent such as a melamine or an epoxidized material, or mixtures thereof.
Abstract:
Methods and apparatus for controlling plating rates of electroless plating solutions. The invention provides for continuous monitoring and replenishment of a one or more components of an electroless plating solution on a real time basis. The invention can be characterized in part by use of a quartz crystal microbalance.
Abstract:
The present invention provides radiation sensitive compositions and methods that comprise novel means for providing relief images of enhanced resolution. In one aspect the invention provides a method for controlling diffusion of photogenerated acid comprising adding a polar compound to a radiation sensitive composition and applying a layer of the composition to a substrate; exposing the composition layer to activating radiation whereby a latent image is generated comprising a distribution of acid moieties complexed with the polar compound; and treating the exposed composition layer to provide an activating amount of acid.
Abstract:
The invention provides a radiation sensitive composition having a polymer binder of phenolic and cyclic alcohol units. At least a portion of the phenolic units and/or cyclic alcohol units of the polymer are bonded to acid labile groups. High solubility differentials between exposed and unexposed regions are realized with only moderate substitution of the binder with the acid labile groups.
Abstract:
A process for selective metallization comprising the steps of providing a substrate coated with a photoresist, imaging the photoresist coating by exposure to pattern radiation and development, flood exposing the photoresist coating to activating radiation, depositing an electroless plating catalyst (16) over the entire imaged photoresist coating and bared underlying substrate, removing the top surface of the flood exposed, catalyzed photoresist coating by development whereby plating catalyst remains in a desired selective pattern and depositing metal (18) over the catalyzed surface to form a metal deposit in a selective pattern such as in a circuit pattern. The process is suitable for the manufacture of diverse articles including printed circuit boards.
Abstract:
Processes and apparatus for uniformly coating discrete substrates by application of a controlled volume of fluid per unit surface area of a substrate. In one aspect, the invention provides a process comprising providing a fluid reservoir; and flowing fluid from the fluid reservoir without substantial interruption through one or more fluid applicators, the fluid applied with a controlled volume per unit surface area of the substrate. The invention also provides processes for applying fluid on a discrete substrate by upwardly or laterally flowing the fluid onto the substrate, and processes for applying fluid onto at least two sides of a discrete substrate. The invention further provides fluid application apparatus which enable application of a uniform fluid layer, including apparatus that provides termination of fluid flow without fluid dripping or trailing of fluid.
Abstract:
A process for applying a pinhole free organic coating on a conductive substrate during an electrodeposition process. The elimination of pinhole defects is accomplished by use of a vibrating device interfaced with the equipment which dislodges gas bubbles adhering to the surface of the substrate during the electrodeposition process.
Abstract:
A photoresist that utilizes a copolymer of a phenol and a cyclic alcohol having increased optical transmission properties relative to photoresists using fully aromatic phenolic resins. Preferred binders are hydrogenated novolak resins and hydrogenated polyvinyl phenol resins.