Microfluidic chip and microfluidic system

Patent metadata

Field	Value
Publication number	US-12226775-B2
Application number	US-202017419970-A
Country	US
Kind code	B2
Filing date	Sep 25, 2020
Priority date	Sep 25, 2020
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

An embodiment of the present disclosure provides a microfluidic chip, including: a first substrate; wherein the first substrate includes a first base, a first electrode layer on the first base; the first electrode layer includes a plurality of first electrodes at intervals along a first direction, wherein a cross-sectional shape of the first electrode parallel to the first base is a centrosymmetric shape, and the cross-sectional shape includes: a first boundary and a second boundary opposite to each other in the first direction; a shape of the first boundary is a centrosymmetric curve, a distance between two end points of the first boundary in a second direction perpendicular to the first direction is less than a length of the first boundary; the second boundary has a same shape and length as the first boundary, and the first and second boundaries are parallel to each other in the first direction.

First claim

What is claimed is:

1. A microfluidic chip, comprising a first substrate; wherein the first substrate comprises a first base and a first electrode layer on the first base; the first electrode layer comprises a plurality of first electrodes arranged at intervals along a first direction, wherein a cross-sectional shape of the first electrode parallel to the first base is a centrosymmetric shape, and the cross-sectional shape comprises a first boundary and a second boundary opposite to each other in the first direction;
a shape of the first boundary is a centrosymmetric curve, a distance between two end points of the first boundary in a second direction perpendicular to the first direction is less than a length of the first boundary; and
the second boundary has a same shape and length as the first boundary, and the first boundary and the second boundary are parallel to each other in the first direction.

2. The microfluidic chip according to claim 1 , wherein two end points of the first boundary are a first end point and a second end point, respectively, two end points of the second boundary are a third end point and a fourth end point, respectively, a first connection line connecting the first end point to the third end point is parallel to the first direction, and a second connection line connecting the second end point to the fourth end point is parallel to the first direction; and
the cross-sectional shape of the first electrode parallel to the first base further comprises: a third boundary and a fourth boundary opposite to each other in the second direction, wherein the third boundary is a line segment connecting the first end point to the third end point, and the fourth boundary is a line segment connecting the second end point to the fourth end point.

3. The microfluidic chip according to claim 2 , wherein a distance between the first end point and the third end point is a first distance;
a distance between the first end point and the second end point in the second direction is a second distance; and
the first distance is equal to the second distance.

4. The microfluidic chip according to claim 1 , wherein two end points of the first boundary are a first end point and a second end point, respectively;
an extension direction of a third connection line connecting the first end point to the second end point intersects with the second direction.

5. The microfluidic chip according to claim 4 , wherein during moving along the first boundary from the first end point to the second end point, a point on the first boundary has a distance away from a virtual reference line and the distance increases gradually or in steps; or
during moving along the first boundary from the first end point to the second end point, a point on the first boundary has a distance away from a virtual reference line and the distance decreases gradually or in steps;
wherein the virtual reference line passes through a symmetrical center of the cross-sectional shape and is parallel to the second direction.

6. The microfluidic chip according to claim 5 , wherein the first boundary has an S-curve or a symmetrical S-curve.

7. The microfluidic chip according to claim 6 , wherein in a predetermined rectangular plane coordinate system, a curve function corresponding to the first boundary is:

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Assignees

• Boe Technology Group Co Ltd

Inventors

• Wei Qiuxu
• Zhao Yingying
• Yao Wenliang
• Fan Bolin
• Gu Le
• Gao Yongjia

Classifications

• B01L2400/0424

  Dielectrophoretic forces · CPC title

• B01L2300/165

  Specific details about hydrophobic, oleophobic surfaces · CPC title

• B01L2300/0645

  Electrodes · CPC title

• B01L3/502792 Primary

  for moving individual droplets on a plate, e.g. by locally altering surface tension · CPC title