Modulated plasma glow discharge treatments for making superhydrophobic substrates
AssigneeThe Procter & Gamble Company
InventorsRiccardo D'Agostino, Italo Corzani, Pietro Favia, Ritalba Lamendola, Gianfranco Palumbo
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Abstract
A method for treating substrates including the steps of: providing a substrate; exposing said substrate to a plasma glow discharge in the presence of a fluorocarbon gas; maintaining said gas at a pressure between about 50 mTorr and about 400 mTorr; generating said plasma as a modulated glow discharge; pulsing said discharge at an on time of 1-500 milliseconds; pulsing said glow at an off time of 1-1000 milliseconds; maintaining said plasma glow discharge at a power density of 0.02-10 watts/cm2; and applying a hydrophobic coating to said substrate.
Claims17
A method for treating substrates including the steps of:
- providing a substrate;
- exposing said substrate to a plasma glow discharge in the presence of a fluorocarbon gas;
- maintaining said gas at a pressure between about 50 mTorr and about 400 mTorr;
- generating said plasma as a modulated glow discharge;
- pulsing said discharge at an on time of 1-500 milliseconds;
- pulsing said glow at an off time of 1-1000 milliseconds;
- maintaining said plasma glow discharge at a power density of 0.02-10 watts/cm2;
- and
- applying a hydrophobic coating to said substrate.
A method for treating a substrate, said method comprising steps of:
- providing a substrate;
- exposing said substrate to a plasma discharge in the presence of a monomeric gas;
- maintaining said gas at a pressure between about 50 mTorr and about 1,000 mTorr;
- generating said plasma as a modulated glow discharge, said plasma having a pulsing on time and a pulsing off time;
- and
- applying a hydrophobic coating to said substrate, said hydrophobic coating having a thickness of 0.01-2 microns.
Dependencies are inferred from the claim text.