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US 9,283,365 B2Granted
Patch production
AssigneeThe University of Queensland
InventorsMark Anthony Fernance Kendall, Derek William Kenneth Jenkins
Life of this patent
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Abstract
A method of producing projections on a patch including providing a mask on a substrate and etching the substrate using an etchant and a passivant to thereby control the etching process and form the projections, wherein the passivant does not include oxygen.
Claims27
A method of producing projections on a patch, the method including:
- a) providing a mask on a substrate;
- and,
- b) etching the substrate using an etchant and a passivant to thereby control the etching process and form the projections, wherein the etching process is continuously controlled using the etchant and the passivant, and wherein the passivant does not include oxygen.
Dependencies are inferred from the claim text.