Sealing interface for microfluidic device

Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture

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Reexamination Certificate

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07028536

ABSTRACT:
A threadless interface for a fluidic system includes a microfluidic device having an outer surface and an internal near-surface channel having a first width and disposed at a first depth relative to the outer surface, with the first width being less than about two times the first depth. A fluidic seal engages the outer surface and exerts an elevated contact pressure against at least a portion of the outer surface without substantially occluding the channel. A preferred seal includes a raised boss. A fault tolerant flow path design can accommodate misalignment between adjacent device layers without detrimentally affecting fluid flow capability. The interface may be used in a microfluidic system for performing parallel analyses such as high performance liquid chromatography.

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