Patent ID: 8741974

Claim:
A method for forming a filter in a fluid flow path in a microfluidic device comprising: providing a photopolymerization reaction solution comprising a photopolymerizable monomer, a crosslinker, a photopolymerization initiator, and a porogen; introducing the photopolymerization reaction solution into the fluid flow path of the microfluidic device; and performing a polymerization reaction of the photopolymerization reaction solution form the filter in the fluid flow path in a microfluidic device, wherein the photopolymerization reaction solution is introduced into the fluid flow path through an inlet formed at a location of the fluid flow path that is not an end of the fluid flow path, and wherein the microfluidic device comprises a first fluid flow path and a second fluid flow path, a first filter is formed in the first fluid flow patch according to the providing, the introducing, and the performing, a second filter is formed in the second fluid flow path according to the providing, the introducing, and the performing, and a pore size of the first filter differs from a pore size of the second filter.