Method of forming a mold and molding a micro-device
First Claim
1. A method of forming a mold for a micro-device including an array of microfeatures, comprising:
- providing a master having a surface contour which includes skin penetration features;
covering the surface contour with a layer of material having a thickness of about 0.01-0.2 inches;
removing the master from the layer of material to form a negative image of the master in the layer of material wherein the negative image is fillable by a flowable process;
filling the negative image fluidically with a flowable powdered metallic materiel to form a device having substantially the same features as the master; and
sintering the powdered metallic material to form the micro-device.
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Accused Products
Abstract
A method of forming a device including a plurality of micron or sub-micron sized features is provided. A master having a surface contour defining a plurality of features is provided. The surface contour of the master is coated with at least one layer of material to form a shell. The master is removed from the shell to form a negative image of the surface contour in the shell. The negative image in the shell is filled with material, for example, polycarbonate, polyacrylic, or polystyrene, to form a device having features substantially the same as the master. The negative image may be filled using injection molding, compression molding, embossing or any other compatible technique.
109 Citations
39 Claims
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1. A method of forming a mold for a micro-device including an array of microfeatures, comprising:
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providing a master having a surface contour which includes skin penetration features;
covering the surface contour with a layer of material having a thickness of about 0.01-0.2 inches;
removing the master from the layer of material to form a negative image of the master in the layer of material wherein the negative image is fillable by a flowable process;
filling the negative image fluidically with a flowable powdered metallic materiel to form a device having substantially the same features as the master; and
sintering the powdered metallic material to form the micro-device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of forming a device including a plurality of micron or sub-micron sized features, the method comprising:
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providing a master having a surface contour defining skin penetration features;
coating the surface contour of the master with at least one layer of material having a thickness of about 0.01-0.2 inches;
removing the master from the layer of material to form a negative image of the surface contour in the layer of material;
forming a mold insert from the negative image; and
performing injection molding to fill the negative image fluidicaily to form a device having substantially the same features as the master. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of forming a device including a plurality of micron or sub-micron sized features, the method comprising:
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providing a master having a surface contour defining features;
coating the surface contour of the master with at least one layer of material at about 0.07 inches thick;
removing the master from the layer of material to form a negative image of the surface contour in the layer of material; and
filling the negative image to form a device having substantially the same features as the master. - View Dependent Claims (32, 33, 34, 35)
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36. A method of forming a medical device including a plurality of micron or sub-micron sized features which form skin penetration members, the method comprising:
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providing a master having a surface contour defining skin penetration features;
coating the surface contour of the master with a single layer of material having a thickness of about 0.01-0.2 inches;
removing the master from the layer of material to form a negative image of the surface contour in the layer of material forming a mold insert from the negative image; and
performing injection molding to fill the negative image fluidically to form the medical device having substantially the same features as the master. - View Dependent Claims (37, 38, 39)
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Specification