Microfluidic devices and methods of manufacture thereof
First Claim
1. A microfluidic device, comprising:
- a substrate comprising a microfluidic channel; and
an electrically conductive feature comprising an electrically conductive layer arranged on a primer layer and positioned with reference to the microfluidic channel, wherein the primer layer comprises;
(i) an organic polymer selected from the group consisting of(a) a homopolymer or copolymer comprising a vinyl lactam repeating unit,(b) a cellulose ether,(c) polyvinyl alcohol, and(d) unmodified or modified gelatin, and(ii) a porous particulate material,wherein the porous particulate material is dispersed in the organic polymer, andwherein the microfluidic channel comprises a side wall portion that joins an upper surface of the substrate at a rim and a lateral separation δ
exists between the rim of the microfluidic channel and the edge of the electrically conductive layer.
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Accused Products
Abstract
A microfluidic device comprising: a substrate having a microfluidic channel, an electrically conductive feature comprising an electrically conductive layer arranged on a primer layer and positioned with reference to the microfluidic channel, wherein the primer layer comprises: (i) an organic polymer selected from the group consisting of. (a) a homopolymer or copolymer including a vinyl lactam repeating unit, (b) a cellulose ether; (c) polyvinyl alcohol; and (d) unmodified or modified gelatin; and (ii) a porous particulate material, the organic polymer being dispersed in the porous particulate material, is provided. Methods for manufacturing the microfluidic devices and their use in a number of applications are also provided.
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Citations
15 Claims
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1. A microfluidic device, comprising:
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a substrate comprising a microfluidic channel; and an electrically conductive feature comprising an electrically conductive layer arranged on a primer layer and positioned with reference to the microfluidic channel, wherein the primer layer comprises; (i) an organic polymer selected from the group consisting of (a) a homopolymer or copolymer comprising a vinyl lactam repeating unit, (b) a cellulose ether, (c) polyvinyl alcohol, and (d) unmodified or modified gelatin, and (ii) a porous particulate material, wherein the porous particulate material is dispersed in the organic polymer, and wherein the microfluidic channel comprises a side wall portion that joins an upper surface of the substrate at a rim and a lateral separation δ
exists between the rim of the microfluidic channel and the edge of the electrically conductive layer. - View Dependent Claims (2, 3, 4, 5)
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6. A method of manufacturing a microfluidic device, the method comprising:
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(A) applying a primer layer to a substrate comprising a microfluidic channel, the primer layer comprising; (i) an organic polymer selected from the group consisting of (a) a homopolymer or copolymer comprising a vinyl lactam repeating unit, (b) a cellulose ether, (c) polyvinyl alcohol, and (d) unmodified or modified gelatin, and (ii) a porous particulate material, wherein the porous particulate material is dispersed in the organic polymer; (B) applying a conductive ink layer over the primer layer at a position referenced to the microfluidic channel, the conductive ink comprising electrically conductive particles dispersed in a humectant organic solvent, wherein during (A) applying the primer layer and/or (B) applying the conductive ink layer, the primer layer and/or the conductive ink layer are applied to the microfluidic channel, and wherein the microfluidic channel comprises a side wall portion that joins an upper surface of the substrate at a rim and the conductive ink layer is applied in the microfluidic channel so that a lateral separation δ
exists between the rim of the conductive ink channel and the edge of the conductive ink layer. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification