Microfluidic system including a bubble valve for regulating fluid flow through a microchannel
First Claim
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1. A microfluidic device, comprising:
- a microfluidic substrate;
a microchannel formed in the microfluidic substrate having an interior bounded by a side wall; and
a valve for regulating a flow of fluid through the microchannel, the valve comprising;
a gas-filled reservoir comprising a recess formed in the microfluidic substrate,a flexible membrane coupled to the microfluidic substrate and forming a single flexible external wall of the microfluidic substrate and a flexible wall of the recess to seal the gas-filled reservoir, andan actuator for selectively deflecting the flexible membrane to increase an internal pressure of the gas-filled reservoir to regulate fluid flow through the microchannel.
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Abstract
A microfluidic system includes a bubble valve for regulating fluid flow through a microchannel. The bubble valve includes a fluid meniscus interfacing the microchannel interior and an actuator for deflecting the membrane into the microchannel interior to regulate fluid flow. The actuator generates a gas bubble in a liquid in the microchannel when a sufficient pressure is generated on the membrane.
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Citations
24 Claims
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1. A microfluidic device, comprising:
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a microfluidic substrate; a microchannel formed in the microfluidic substrate having an interior bounded by a side wall; and a valve for regulating a flow of fluid through the microchannel, the valve comprising; a gas-filled reservoir comprising a recess formed in the microfluidic substrate, a flexible membrane coupled to the microfluidic substrate and forming a single flexible external wall of the microfluidic substrate and a flexible wall of the recess to seal the gas-filled reservoir, and an actuator for selectively deflecting the flexible membrane to increase an internal pressure of the gas-filled reservoir to regulate fluid flow through the microchannel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A microfluidic device, comprising:
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a microfluidic substrate; a microchannel formed in the microfluidic substrate having an interior bounded by a side wall; and a valve for regulating a flow of fluid through the microchannel, the valve comprising; a gas-filled reservoir comprising a recess, a flexible membrane coupled to the microfluidic substrate and forming a single flexible external wall of the microfluidic substrate and a flexible wall of the recess to seal the gas-filled reservoir, and an actuator for selectively deflecting the flexible membrane to increase an internal pressure of the gas-filled reservoir to regulate fluid flow through the microchannel. - View Dependent Claims (24)
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Specification