Microfabricated elastomeric valve and pump systems
A method of fabricating an elastomeric structure, comprising: forming a first elastomeric layer on top of a first micromachined mold, the first micromachined mold having a first raised protrusion which forms a first recess extending along a bottom surface of the first elastomeric layer; forming a second elastomeric layer on top of a second micromachined mold, the second micromachined mold having a second raised protrusion which forms a second recess extending along a bottom surface of the second elastomeric layer; bonding the bottom surface of the second elastomeric layer onto a top surface of the first elastomeric layer such that a control channel forms in the second recess between the first and second elastomeric layers; and positioning the first elastomeric layer on top of a planar substrate such that a flow channel forms in the first recess between the first elastomeric layer and the planar substrate.
1. A method of filling a termination region of a fluidic device, the method comprising:
providing a gas permeable elastomeric block;
providing a plurality of microfabricated channels formed in the elastomeric block, wherein at least one of the plurality of microfabricated channels includes an entrance region that couples with at least one of the other microfabricated channels and a termination region without an outlet channel;
providing a liquid at the entrance region of the at least one channel of the fluidic device;
applying a pressure to the liquid to fill the termination region with the liquid; and
forcing a gas out of the termination region with the pressurized liquid by diffusing the gas through the gas permeable elastomeric block of the fluidic device.
2. The method of claim 1 , wherein the elastomeric block comprises a silicon elastomer.
3. The method of claim 1 , wherein the termination region is a chamber.
4. The method of claim 1 , wherein termination region is a termination channel.
5. The method of claim 1 , wherein the termination region is defined by a closed valve.
6. The method of claim 1 , wherein the liquid comprises at least water, buffer, aqueous solution, or oil.
7. The method of claim 1 , wherein the elastomeric block has a Young's modulus between 50 Pa and about 10 MPa.
8. The method of claim 1 , wherein the elastomeric block has a Young's modulus between 100 Pa and about 1 MPa.