Devices and methods for using centripetal acceleration to drive fluid movement in a microfluidics system
First Claim
1. A microsystem platform, comprising a substrate having a first flat, planar surface and a second flat, planar surface opposite thereto, wherein the first surface comprises a multiplicity of microfluidics components embedded in said first surface and in fluidic contact, and a resistive heater element comprising in combination:
- a) an electrically inert substrate capable of being screen printed with a conductive ink and a resistive ink;
b) a conductive ink screen-printed in a pattern;
c) a resistive ink screen-printed in a pattern over the conductive ink pattern wherein the resistive ink in electrical contact with the conductive ink and wherein an electrical potential applied across the conductive ink causes current to flow across the resistive ink wherein the resistive ink produces heat, wherein the resistive heater element is in thermal contact with at least one of the multiplicity of microfluidics components.
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Abstract
This system provides methods and apparatus for performing microanalytic and microsynthetic analyses and procedures. Specifically, the system provides a microsystem platform for use with a micromanipulation device to manipulate the platform by rotation, thereby utilizing the centripetal force resulting from rotation of the platform to motivate fluid movement through microchannels embedded in the microplatform. The microsystem platforms of the system are also provided having microfluidics components, resistive heating elements, temperature sensing elements, mixing structures, capillary and sacrificial valves, and methods for using these microsystems platforms for performing biological, enzymatic, immunological and chemical assays. An electronic spindle designed rotor capable of transferring electrical signals to and from the microsystem platforms of the system is also provided.
133 Citations
8 Claims
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1. A microsystem platform, comprising a substrate having a first flat, planar surface and a second flat, planar surface opposite thereto, wherein the first surface comprises a multiplicity of microfluidics components embedded in said first surface and in fluidic contact, and a resistive heater element comprising in combination:
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a) an electrically inert substrate capable of being screen printed with a conductive ink and a resistive ink;
b) a conductive ink screen-printed in a pattern;
c) a resistive ink screen-printed in a pattern over the conductive ink pattern wherein the resistive ink in electrical contact with the conductive ink and wherein an electrical potential applied across the conductive ink causes current to flow across the resistive ink wherein the resistive ink produces heat, wherein the resistive heater element is in thermal contact with at least one of the multiplicity of microfluidics components. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
d) a dielectric ink screen-printed over the resistive ink pattern and conductive ink pattern. -
6. A microsystems platform according to claim 1, wherein one of the multiplicity of microfluidics components is a microchannel.
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7. The microsystems platform of claim 6, wherein the microchannel further comprises a wax valve.
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8. The microsystems platform of claim 7, wherein the resistive heater element is in thermal contact with the wax valve.
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Specification