Patent ID: 7156118

Claim:
A process for producing a channel system for microfluidic flow having at least three fluidic connections through which a fluid can flow in or out, the system comprising joining a first body having at least two surfaces to a second body having at least two surfaces by a first means whereby a first channel is formed between a first surface of each of the first and second bodies and wherein the first channel is fluidically sealed on two edges and has a defined width or distance between the two first surfaces and a defined depth, and joining a third body to the first and second bodies by a second means such that a second channel is formed between a first surface of the third body and a second surface of the first and second bodies, wherein the channel is fluidically sealed on two edges and has a defined width and depth, and further wherein the second channel crosses the first channel, thereby providing a system having three fluidic connections, characterized in that the width each channel is less than 1 mm and the ratio of the depth to width of at least one of the channels is greater than 3.