Method of contact coating a microneedle array
First Claim
1. A method of coating a microneedle array comprising:
- providing a microneedle array having a substrate and a plurality of microneedles;
providing a flexible film;
providing a coating solution comprising a carrier fluid and a coating material;
applying the coating solution onto a first major surface of the flexible film;
coating the microneedle array with coating solution by bringing the first major surface of the flexible film into contact with the microneedles and removing the flexible film from contact with the microneedles, wherein the flexible film and the microneedle array define an angle of flexure during the coating step that is between 5 and 15 degrees; and
allowing the carrier fluid to evaporate from the microneedle array to leave a dried coating on the microneedle array.
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Accused Products
Abstract
A method of coating a microneedle array by applying a coating fluid using a flexible film in a brush-like manner. A method of coating a microneedle array comprising: providing a microneedle array having a substrate and a plurality of microneedles; providing a flexible film; providing a coating solution comprising a carrier fluid and a coating material; applying the coating solution onto a first major surface of the flexible film; performing a transfer step of bringing the first major surface of the flexible film into contact with the microneedles and removing the flexible film from contact with the microneedles; and allowing the carrier fluid to evaporate. Also, a method of coating a microneedle array by applying a coating solution onto a first major surface of a coating substrate to form a layer of applied coating solution having a thickness equal to or less than the height of at least one of the microneedles and performing a transfer step of bringing the first major surface of the coating substrate into contact with the microneedles and removing the coating substrate from contact with the microneedles, thereby transferring at least a portion of the coating solution to the microneedle array.
132 Citations
27 Claims
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1. A method of coating a microneedle array comprising:
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providing a microneedle array having a substrate and a plurality of microneedles; providing a flexible film; providing a coating solution comprising a carrier fluid and a coating material; applying the coating solution onto a first major surface of the flexible film; coating the microneedle array with coating solution by bringing the first major surface of the flexible film into contact with the microneedles and removing the flexible film from contact with the microneedles, wherein the flexible film and the microneedle array define an angle of flexure during the coating step that is between 5 and 15 degrees; and allowing the carrier fluid to evaporate from the microneedle array to leave a dried coating on the microneedle array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of coating a microneedle array comprising:
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providing a microneedle array having a substrate and a plurality of microneedles; providing a coating solution comprising a carrier fluid and a coating material; providing a coating apparatus comprising a coating substrate and a supporting member for the microneedle array, wherein the coating substrate is flexibly mounted within the coating apparatus and wherein at least a portion of the first major surface of the coating substrate is hydrophilic; applying the coating solution onto a first major surface of the coating substrate to form a layer of applied coating solution having a thickness equal to or less than the height of at least one of the microneedles; performing a transfer step of bringing the first major surface of the coating substrate into contact with the microneedles and removing the coating substrate from contact with the microneedles, thereby transferring at least a portion of the coating solution to the microneedle array; and allowing the transferred carrier fluid to evaporate. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of coating a microneedle array comprising:
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providing a microneedle array having a substrate and a plurality of microneedles; providing a flexible film; providing a coating solution comprising a carrier fluid and a coating material; applying the coating solution onto a first major surface of the flexible film; coating the microneedle array with coating solution by bringing the first major surface of the flexible film into contact with the microneedles and removing the flexible film from contact with the microneedles, wherein the flexible film is moved in a linear direction across the microneedles while the coating solution on the flexible film is in contact with the microneedles; and allowing the carrier fluid to evaporate from the microneedle array to leave a dried coating on the microneedle array.
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27. A method of coating a microneedle array comprising:
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providing a microneedle array having a substrate and a plurality of microneedles, wherein the surface of the microneedles is coated with a thin film of diamond-like glass; providing a flexible film; providing a coating solution comprising a carrier fluid and a coating material; applying the coating solution onto a first major surface of the flexible film; coating the microneedle array with coating solution by bringing the first major surface of the flexible film into contact with the microneedles and removing the flexible film from contact with the microneedles; allowing the carrier fluid to evaporate from the microneedle array to leave a dried coating on the microneedle array.
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Specification