Plastic Laminated Microchannel Device

Description: A microchannel plastic laminated device is being developed to detect trace quantities of Cr and other heavy metals in ground water. The device consists entirely of plastic and ceramic modules, including polyimide and Polycarbonate laminates, micropumps, and reservoirs. By using plastic laminates, a complete analytical system with no need for external micropumps or reservoirs (although the electronics and power source are external) can be fabricated. The module laminates, except the reservoirs/inlet, pumps, and detector, are laser machined in 100-µm-thick polymide using a 245-nm excimer laser micromachining system. From top to bottom, the following functional sections are laminated on top of each other:

Plastic Laminated Microchannel Device (4 cm x 4 cm x 2.75 cm tall) Individual Modules
	Inlet Module (1x) Polycarbonate 2 cm x 2 cm x 0.95 cm Inlet ports for syringe reservoirs
	Pump Module (2x) Commercially made by IMIT Piezoelectric 2 cm x 3.5 cm x 0.5 cm Polycarbonate housing
	Mixing Module (1x) Laser-machined polyimide 800-µm-wide x 100-µm-deep channel 200-µm-wide spokes 2 cm x 2 cm
	Half of Reaction Module (2x) Laser-machined polyimide Top half flipped &overlaid 200-µm-wide x 100-µm-deep channel 2 cm x 2 cm
	Detector Module (1x) 0.16-cm thick BK7 substrate Au leads Ir, Ag, Au sensor coatings Si₃N₄/Ta₂O₅ overcoat 2 cm x 2.2 cm
	Detector Channel Module (1x) Laser-machined polyimide 200-µm-wide x 100-µm-deep channel 2 cm x 2 cm Outlet port

Laminated Modules (2 cm x 2.2 cm x 0.2 cm thick) Detector Channel Detector Module Reaction Module Mixing Module Reaction, mixing, and detector modules, detector channel and exit port.
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