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US 4,536,271 AGranted
Method of plasma treating a polymer film to change its properties
AssigneeMobil Oil Corporation
InventorGregory P. Collins
Life of this patent
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Abstract
A method of treating a polymer film to alter its physical properties, comprising exposing the film to an ionized plasma in a vacuum environment with the ionizing gas producing one of surface etching, polymer cross-linking and coating of the film.
Claims16
A method of strengthening a polymer film comprising the steps of:
- placing said film in a vacuum chamber containing a pair of electrodes;
- filling said chamber with a treatment gas under a pressure of 0.2-0.7 Torr;
- applying a voltage to said electrodes to initiate a discharge in and ionization of said treatment gas;
- and
- exposing said film to said ionized treatment gas for a predetermined period of time and thereby etching away a surface layer of said film.
2 more elements
Dependencies are inferred from the claim text.