Method of contact coating a microneedle array
First Claim
Patent Images
1. A method of coating a microneedle array comprising:
- providing a microneedle array having a substrate and a plurality of microneedles;
applying a coating solution comprising a carrier fluid and a coating material onto a first major surface of a 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, wherein at least a portion of the coating solution is transferred to the microneedle array during the transfer step, and wherein the flexible film is moved in a linear direction across the microneedles while the coating solution on the first major surface of the flexible film is in contact with the microneedles; and
allowing the carrier fluid to evaporate to leave a dried coating on the microneedle array.
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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.
101 Citations
29 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; applying a coating solution comprising a carrier fluid and a coating material onto a first major surface of a 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, wherein at least a portion of the coating solution is transferred to the microneedle array during the transfer step, and wherein the flexible film is moved in a linear direction across the microneedles while the coating solution on the first major surface of the flexible film is in contact with the microneedles; and allowing the carrier fluid to evaporate 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; applying a coating solution comprising a carrier fluid and a coating material onto a first major surface of a flexible film; performing a transfer step of bringing the first ma or surface of the flexible film into contact with the microneedles and removing the flexible film from contact with the microneedles, wherein at least a portion of the coating solution is transferred to the microneedle array during the transfer step, and wherein the flexible film and the microneedle array define an angle of flexure during the transfer step that is between 5 and 15 degrees; and allowing the carrier fluid to evaporate.
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18. 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; applying a coating solution comprising a carrier fluid and a coating material onto a first major surface of a flexible film; performing a transfer step of bringing the first ma or surface of the flexible film into contact with the microneedles and removing the flexible film from contact with the microneedles, wherein at least a portion of the coating solution is transferred to the microneedle array during the transfer step; and allowing the carrier fluid to evaporate.
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19. 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 at least one of the coating substrate and the microneedle array is flexibly mounted within the coating apparatus; 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, wherein the coating solution is applied to the first major surface of the coating substrate with a pickup plate or an extrusion die; 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 (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification