Laminated microfluidic structures and method for making
First Claim
1. A method for laminating at least two polymeric components to form a laminated, polymeric microfluidic structure, comprising:
- applying a weak solvent to a surface of one of the at least two components at a first temperature;
adjacently contacting opposing surfaces, including the surface having the applied weak solvent, of the at least two components; and
creating a thermal activation condition by raising the temperature to a second temperature that is greater than the first temperature for thermally activating the weak solvent, wherein the weak solvent has a chemical formula of;
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Abstract
A method for making a polymeric microfluidic structure in which two or more components (layers) of the microfluidic structure are fixedly bonded or laminated with a weak solvent bonding agent, particularly acetonitrile or a mixture of acetonitrile and alcohol. In an aspect, acetonitrile can be used as a weak solvent bonding agent to enclose a microstructure fabricated in or on a non-elastomeric polymer such as polystyrene, polycarbonate, acrylic or other linear polymer to form a three-dimensional microfluidic network. The method involves the steps of wetting at least one of the opposing surfaces of the polymeric substrate components with the weak solvent bonding agent in a given, lower temperature range, adjacently contacting the opposing surfaces, and thermally activating the bonding agent at a higher temperature than the lower temperature range for a given period of time. The contacted polymeric substrates may also be aligned prior to thermal activation and compressed during thermal activation. A laminated, polymeric microfluidic structure is also disclosed.
51 Citations
39 Claims
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1. A method for laminating at least two polymeric components to form a laminated, polymeric microfluidic structure, comprising:
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applying a weak solvent to a surface of one of the at least two components at a first temperature; adjacently contacting opposing surfaces, including the surface having the applied weak solvent, of the at least two components; and creating a thermal activation condition by raising the temperature to a second temperature that is greater than the first temperature for thermally activating the weak solvent, wherein the weak solvent has a chemical formula of; - View Dependent Claims (16, 17, 18, 19, 20, 21)
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2. A method for laminating at least two polymeric components to form a laminated, polymeric microfluidic structure, comprising:
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applying a weak solvent to a surface of one of the at least two components at a first temperature; adjacently contacting opposing surfaces including the surface having the applied weak solvent, of the at least two components; and creating a thermal activation condition by raising the temperature to a second temperature that is greater than the first temperature for thermally activating the weak solvent, wherein the weak solvent has a chemical formula of; - View Dependent Claims (22, 23, 24, 25, 26, 27)
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3. A method for laminating at least two polymeric components to form a laminated, polymeric microfluidic structure, comprising:
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applying a weak solvent to a surface of one of the at least two components at a first temperature; adjacently contacting opposing surfaces, including the surface having the applied weak solvent, of the at least two components; and creating a thermal activation condition by raising the temperature to a second temperature that is greater than the first temperature for thermally activating the weak solvent, wherein the weak solvent has a chemical formula of; - View Dependent Claims (28, 29, 30, 31, 32, 33)
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4. A method for laminating at least two polymeric components to form a laminated, polymeric microfluidic structure, comprising:
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applying a weak solvent to a surface of one of the at least two components at a first temperature; adjacently contacting opposing surfaces, including the surface having the applied weak solvent, of the at least two components; and creating a thermal activation condition by raising the temperature to a second temperature that is greater than the first temperature for thermally activating the weak solvent, wherein the weak solvent is acetonitrile. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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5. A method of making a laminated, polymeric microfluidic structure, comprising:
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providing a first component having first and second surfaces, wherein at least one of the surfaces includes a micro structure, further wherein the first component is a polymeric material; providing at least a second, polymeric component having first and second surfaces, wherein one of the first and second surface of the first component is intended to be fixedly attached to a respective second and first opposing surface of the second component; applying a weak solvent bonding agent with respect to the polymeric components to at least one of the first and the second component at a first temperature; creating a thermal activation condition b raisin the temperature to a second temperature that is greater than the first temperature for thermally activating the weak solvent; and adjacently contacting the opposing surface, wherein the weak solvent bonding agent is acetonitrile. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification