A novel technique based on direct thick film writing has been developed for the rapid prototyping of microfluidic devices. The direct writing process is based on pressure driven dispensing of precursor materials through a micro-capillary tip. The process exhibits wide latitude in both the materials that can be patterned and the substrate formats and shapes that can be accommodated. A fabrication process flow sequence with general applicability to microfluidic devices was developed and its efficacy was demonstrated by the construction of two-input mixer devices. Integration of fluidic components with electrical circuitry was also demonstrated.

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