Electrostatic deposition of particles generated from rapid expansion of supercritical fluid solutions
AssigneeBattelle Memorial Institute
InventorsJohn L. Fulton, George Deverman
Life of this patent
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Abstract
A method for depositing a substance on a substrate that involves forming a supercritical fluid solution of at least one supercritical fluid solvent and at least one solute, discharging the supercritical fluid solution through an orifice under conditions sufficient to form solid particles of the solute that are substantially free of the supercritical fluid solvent, and electrostatically depositing the solid solute particles onto the substrate. The solid solute particles may be charged to a first electric potential and then deposited onto the substrate to form a film. The solute particles may have a mean particle size of less than 1 micron.
Claims11
A method for depositing a substance on a substrate, comprising:
- forming a supercritical fluid solution that includes at least one supercritical fluid solvent and at least one solute;
- discharging the supercritical fluid solution through an orifice under conditions sufficient to form solid particles of the solute that are substantially free of the supercritical fluid solvent;
- charging the solid solute particles to a first electric potential;
- and
- depositing the charged solid solute particles onto a substrate.
A method for depositing a substance on a substrate, comprising:
- forming a solution that includes at least one supercritical fluid solvent and at least one solute;
- discharging the solution through an orifice under conditions sufficient to form particles of the solute having a mean particle size of less than 1 micron;
- and
- electrostatically depositing the solute particles onto the substrate.
Dependencies are inferred from the claim text.