US 12,390,809 B2
Microfluidic chip
Le Gu, Beijing (CN); Yingying Zhao, Beijing (CN); Wenliang Yao, Beijing (CN); Bolin Fan, Beijing (CN); Yongjia Gao, Beijing (CN); and Qiuxu Wei, Beijing (CN)
Assigned to BEIJING BOE SENSOR TECHNOLOGY CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/600,294
Filed by Beijing BOE Sensor Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jan. 29, 2021, PCT No. PCT/CN2021/074457
§ 371(c)(1), (2) Date Sep. 30, 2021,
PCT Pub. No. WO2021/227567, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. PCT/CN2020/090005 (WO), filed on May 13, 2020.
Prior Publication US 2022/0314217 A1, Oct. 6, 2022
Int. Cl. B01L 3/00 (2006.01); B81B 3/00 (2006.01)
CPC B01L 3/50273 (2013.01) [B81B 3/0089 (2013.01); B01L 2200/027 (2013.01); B01L 2200/0689 (2013.01); B01L 2300/161 (2013.01); B01L 2400/0427 (2013.01); B81B 2201/057 (2013.01); B81B 2203/033 (2013.01); B81B 2203/0353 (2013.01); B81B 2203/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A microfluidic chip, comprising:
a middle region and a peripheral region surrounding the middle region; wherein the middle region comprises a liquid storage region and a detection region; the microfluidic chip comprises a first substrate and a second substrate opposite to each other; the first substrate comprises a first base plate and a first electrode layer on a side of the first base plate proximal to the second substrate; the second substrate comprises a second base plate and a second electrode layer on a side of the second base plate proximal to the first substrate; wherein
the first substrate comprises a liquid storage tank on a side of the first base plate proximal to the second substrate and a liquid inlet on a side of the first base plate away from the second substrate, the liquid inlet penetrates through a surface of the liquid storage tank away from the second substrate; the liquid storage tank and the liquid inlet are both in the liquid storage region;
a cross section of the liquid storage tank taken along a thickness direction of the first substrate and a direction parallel to a direction in which the liquid storage region points towards the detection region has a first side proximal to the detection region; the first side has a first end point and a second end point, and the first end point is farther away from the second substrate than the second end point; an extending direction of a line connecting the first end point and the second end point is inclined with respect to an axial direction of the liquid inlet, and a distance from the first end point to an axis of the liquid inlet is smaller than a distance from the second end point to the axis of the liquid inlet; and
the liquid storage tank further comprises a second side opposite to the first side, and the other pair of sides arranged opposite to each other, which are a third side and a fourth side;
wherein a dihedral angle between the surface and the second side, the third side or the fourth side is 90 degrees or approximately 90 degrees.