Method of aqueous anodizing aluminum substrates of solid capacitors
AssigneeKemet Electronics Corporation
InventorsAlbert Kennedy Harrington, Brian John Melody, John Tony Kinard, Philip Michael Lessner, David Alexander Wheeler
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Abstract
A method of anodizing an aluminum substrate comprising heating the substrate to a first temperature of 200° C. to about 380° C.; suspending the substrate into a first electrolyte and applying a first anodizing current to the first electrolyte; rinsing the substrate; heating the substrate to a second temperature of 200° C. to about 380° C.; and suspending the substrate into a second electrolyte and applying a second anodizing current to the second electrolyte, wherein the first electrolyte and second electrolyte each comprise an aqueous solution of at least one salt of alpha-hydroxy acid.
Claims15
A method of anodizing an aluminum substrate comprising pre-anodizing the substrate in an ammonium adipate electrolyte;
- cutting the substrate;
- heating the substrate to a first temperature of about 200° C. to about 380° C.;
- and then suspending the substrate into a first electrolyte and applying a first anodizing current to the first electrolyte, wherein the first electrolyte comprises an aqueous solution of at least one salt of alpha-hydroxy acid.
A method of edge anodizing an aluminum substrate having a cut edge comprising pre-anodizing the substrate in an ammonium adipate electrolyte;
- cutting the substrate;
- heating the substrate to a first temperature of about 200° C. to about 380° C.;
- suspending the substrate into a first electrolyte and applying a first anodizing current to the first electrolyte;
- rinsing the substrate;
- heating the substrate to a second temperature of about 200° C. to about 380° C.;
- and suspending the substrate into a second electrolyte and applying a second anodizing current to the second electrolyte, wherein the first electrolyte and second electrolyte each comprise an aqueous solution of at least one salt of alpha-hydroxy acid.
Dependencies are inferred from the claim text.