Microfluidic system

Patent metadata

Field	Value
Publication number	US-9314791-B2
Application number	US-201113331635-A
Country	US
Kind code	B2
Filing date	Dec 20, 2011
Priority date	Dec 21, 2010
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

Disclosed is a micro-fluidic system including a lower substrate, an upper substrate formed opposite to the lower substrate and formed with an air injection path, and a micro-fluidic device interposed between the upper and lower substrates, wherein the micro-fluidic chamber includes a fluid chamber filled with a fluid and the fluidic chamber is physically connected to the air injection path.

First claim

What is claimed is:

1. A micro-fluidic system, the system comprising:
a lower substrate;
an upper substrate opposite to the lower substrate, the upper substrate including a first air injection path; and
a micro-fluidic device interposed between the upper and lower substrates, the micro-fluidic device including a fluidic chamber filled with a fluid and a second air injection path corresponding to the first air injection path,
wherein the second air injection path includes a first groove on the micro-fluidic device,
wherein the first air injection path includes a second groove opposite to the first groove, and an air injection pipe is positioned through the second groove,
wherein a coil spring is disposed on a side surface of the air injection pipe,
wherein an O-ring is secured to a support unit, disposed at a distal end of the air injection pipe, configured to move with the support unit throughout displacement of the support unit and to block the first groove on the micro-fluidic device, and the size of the O-ring corresponds to that of the first groove, such that a maximum radial extent of the O-ring sits within the first groove,
wherein the support unit is disposed on the O-ring and the support unit contacts with the O-ring, and
wherein the fluidic chamber has a reaction region including at least one electrode which detects a degree of reaction with the fluid.

2. The micro-fluidic system of claim 1 , further comprising fastening means fastening the upper and lower substrates, wherein the fastening means includes a clamp on the upper substrate and a groove at a lateral surface of the lower substrate.

3. The micro-fluidic system of claim 2 , further comprising an elastic member between the clamp and the upper substrate.

4. The micro-fluidic system of claim 3 , wherein the elastic member separates the micro-fluidic device from the upper and lower substrates.

5. The micro-fluidic system of claim 1 , wherein the upper substrate includes at least two through holes, at least two guide posts and at least two bushes, each guide post being inserted into a corresponding through hole of the at least two through holes and secured to the lower substrate, and each guide post being inserted into a corresponding bush of the at least two bushes.

6. The micro-fluidic system of claim 5 , wherein a ball bearing is interposed between each corresponding bush and guide post.

7. The micro-fluidic system of claim 1 , wherein a periphery of the air injection pipe is mounted with a stopper for restricting elasticity of the coil spring.

8. The micro-fluidic system of claim 1 , wherein the fluid inside the fluidic chamber of the micro-fluidic device includes biological materials.

9. The micro-fluidic system claim 1 , wherein the at least one electrode includes a reference electrode, a counter electrode and a working electrode.

10. The micro-fluidic system of claim 1 , wherein a gap between the upper and lower substrates is larger than a thickness of the micro-fluidic device.

Assignees

• Kim Ji Tae
• Kim Gyoung Soo
• Hyun Seok Jung
• Lim Guei Sam
• Lee Youn Jae
• Lg Electronics Inc

Inventors

• Kim Ji Tae
• Kim Gyoung Soo
• Hyun Seok Jung
• Lim Guei Sam
• Lee Youn Jae

Classifications

• B01L2200/025

  Align devices or objects to ensure defined positions relative to each other · CPC title

• B01L2200/027

  for microfluidic devices · CPC title

• B01L2200/0689

  Sealing · CPC title

• B01L3/502715 Primary

  characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces · CPC title

• B01L2300/0816

  Cards, e.g. flat sample carriers usually with flow in two horizontal directions · CPC title