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

Claim 9:
10. A microfluidic device, comprising:
a substrate having a fluid flow microfluidic channel formed in the substrate; and
a microfluidic valve positioned in fluid communication with the fluid flow microfluidic channel such that the microfluidic valve initially allows or blocks fluid flow through the fluid flow microfluidic channel;
wherein the microfluidic valve comprises a sealing layer over the fluid flow 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 comprises, at or beneath the blister, a puncturing point oriented toward the sealing layer, wherein the microfluidic valve is actuatable by pressing on the blister to puncture the sealing layer, wherein the microfluidic valve is configured, when the microfluidic valve is actuated, to either switch (1) from allowing fluid flow through the microfluidic channel to blocking fluid flow through the microfluidic channel, or (2) from blocking fluid flow through the microfluidic channel to allowing fluid flow through the microfluidic channel.