The present invention provides, in certain embodiments, improved microfluidic systems and methods for fabricating improved microfluidic systems, which contain one or more levels of microfluidic channels. The inventive methods can provide a convenient route to topologically complex and improved microfluidic...http://www.google.com.au/patents/US7323143?utm_source=gb-gplus-sharePatent US7323143 - Microfluidic systems including three-dimensionally arrayed channel networks
