Abstract:
A THIN, CONTINUOUS FILM IS FORMED ON A SUBSTRATE BY ULTRAVIOLET SURFACE PHOTOPOLYMERIZATION OF A MATERIAL IN THE GASEOUS PHASE. THE MATERIAL IS SELECTED FROM VARIOUS ANHYDRIDES AND DIANHYDRIDES. SUCH FILMS, WHICH CAN BE SELECTIVELY FORMED AS ELECTRICALLY INSULATING OR ELECTRICALLY CONDUCTIVE, ARE USEFUL AS COATINGS ON METALIC AND NONMETALLIC SUBSTRATES, AND FOR CORROSION PROTECTION. THE ELECTRICALLY INSULATING FILMS ARE USEFUL FURTHER AS CAPACITOR DIELECTRICS, CRYOGENIC DEVICE INSULATION, INSULATION FOR MICROELECTRIC DEVICES, AND PRIMER OR INSULATION ON ELECTRI-
CALLY CONDUCTIVE WIRE, WHILE THE ELECTRICALLY CONDUCTIVE FILMS CAN ALSO BE EMPLOYED AS CONDUCTIVE LAYERS IN MICROELECTRIC DEVICES.
Abstract:
Laminated structures are formed which are bonded by a novel fused tetrafluoroethylene polymer. The tetrafluoroethylene polymer is initially produced as a white powdery floc by irradiating tetrafluoroethylene monomer vapor at a temperature ranging from about 0* C to about 200* C and at a pressure of about 10 torr to 760 torr with light of wave length ranging from 1,800 to 2,400 Angstroms. The floc polymer is deposited on at least one surface of a lamina and a second lamina is placed over the deposited polymer to form a composite which is then heated to fuse the polymer and form the laminate.
Abstract:
A solvent free method for removing thin organic polymeric film from a substrate is provided utilizing ultraviolet light at wavelengths below 3,500 Angstroms. The method also can be employed to effect the direct configurational removal of organic polymeric film from etchable substrates to provide for the fabrication of microelectronic circuits.
Abstract:
A thin, continuous adherent coating is formed on a substrate by ultraviolet surface photopolymerization of a synthetic organic antithrombogenic compound in the gaseous phase. The resulting coated article exhibits antithrombogenic behavior and is suitable for prosthetic use.