Patent ID: 6878271
Filing Date: 2005-04-12
Classification: B01L,C30B

Abstract:
1. A microfluidic system, comprising: a first microchannel formed in a substrate; a first communication port coupling the first microchannel to a surface of the substrate; a second microchannel formed in the substrate; a third microchannel formed in the substrate; and a capping module having a recess formed therein and having a semi-permeable membrane for separating substances by size exclusion covering the recess to form a chamber, the membrane forming a wall of said chamber, the capping module including an inlet to the chamber and an outlet to the chamber formed therein, wherein the capping module is adapted to be stacked on the substrate, such that the inlet to the chamber is placed in communication with the first microchannel, the outlet to the chamber is placed in communication with the second microchannel, and said membrane is placed in communication with the third microchannel, such that filtrate passing through the membrane enters the third microchannel thereby introducing a microfluidic filtration function into the microfluidic system.