Microfluidic pump and valve structures and fabrication methods
First Claim
1. A microfluidic device, comprising a first polystyrene substrate having upper and lower surfaces and microfeatures formed therein, and a polystyrene membrane solvent bonded to the upper surface of the first substrate, and having a relaxed state wherein the polystyrene membrane lies substantially against the upper surface of the first substrate and an actuated state wherein the polystyrene membrane is moved away from the upper surface of the first substrate.
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Accused Products
Abstract
Plastic microfluidic structures having a substantially rigid diaphragm that actuates between a relaxed state wherein the diaphragm sits against the surface of a substrate and an actuated state wherein the diaphragm is moved away from the substrate. As will be seen from the following description, the microfluidic structures formed with this diaphragm provide easy to manufacture and robust systems, as well readily made components such as valves and pumps.
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Citations
26 Claims
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1. A microfluidic device, comprising a first polystyrene substrate having upper and lower surfaces and microfeatures formed therein, and a polystyrene membrane solvent bonded to the upper surface of the first substrate, and having a relaxed state wherein the polystyrene membrane lies substantially against the upper surface of the first substrate and an actuated state wherein the polystyrene membrane is moved away from the upper surface of the first substrate.
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2. A polymeric microfluidic device, comprising:
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only a single, non-elastomeric polymer substrate layer having upper and lower surfaces and at least one microchannel disposed in the upper surface, wherein the upper surface is characterized by at least one bonded region and at least one bond-free region, further wherein the at least one microchannel has an end fluidically intersecting the bond-free region; and only a single, non-elastomeric polymer membrane layer of the same material as the substrate layer having a continuous surface, bonded to the at least one bonded region of the upper surface of the substrate layer and entirely covering the at least one bond-free region including the at least one microchannel, the membrane being characterized by a non-actuated state wherein the membrane is in contact with the at least one bond-free region and an actuated state wherein the membrane is not in contact with the at least one bond-free region, characterized by an integrated, monolithic construction so as to form a two-layer device. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification