Patent ID: 11857965
Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Field: Chemical engineering (Chemistry)
Classification: CPC B  F | IPC B  F

Claim 6:
7. A microfluidic valve, comprising:
a substrate having a first microfluidic channel formed in the substrate and a second microfluidic channel formed in the substrate;
a sealing layer over the microfluidic channel; and
a flexible blister layer over the sealing layer, wherein the flexible blister layer includes a blister formed as a distended portion with a blister volume between the flexible blister layer and the sealing layer;
wherein the microfluidic valve is a normally-closed valve, wherein the second microfluidic channel is in fluid communication with the blister, wherein the sealing layer separates the blister from fluid communication with the first microfluidic channel, and wherein puncturing the sealing layer places the blister into fluid communication with the first microfluidic channel to allow fluid to flow between the first microfluidic channel and the second microfluidic channel through the blister volume.