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Microfluidic device

A technology of microfluidic devices and substrates, which is applied in the field of microfluidics, and can solve problems such as the inability to detect the accurate position of droplets with changing droplet sizes

Active Publication Date: 2021-12-10
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a microfluidic device, which is used to improve the prior art, which cannot control the size change of the droplet and the droplet on the electrode. The problem of detecting the exact position within the orthographic projection of a surface

Method used

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Examples

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Embodiment Construction

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0028] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0029] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention provides a microfluidic device, and relates to the technical field of microfluidics. The microfluidic device comprises a first substrate and a second substrate which are oppositely arranged, and a cavity used for containing liquid is formed between the first substrate and the second substrate; the first substrate comprises a plurality of driving electrodes and a plurality of first electrodes, and the driving electrodes are located on the sides, facing the second substrate, of the first electrodes; at least one driving electrode comprises at least one opening part, and the opening part penetrates through the driving electrode in the direction perpendicular to the plane where the first substrate is located; the orthographic projection of at least one first electrode on the plane where the first substrate is located at least covers the orthographic projection of one opening part on the plane where the first substrate is located; the second substrate comprises at least one second electrode, and the orthographic projection of the second electrode on the plane where the first substrate is located is at least partially overlapped with the orthographic projection of the first electrode on the plane where the first substrate is located. Through capacitance generated between the first electrode and the second electrode through the opening part, the size and the accurate position of the liquid drop existing in the orthographic projection surface of the driving electrode are detected.

Description

technical field [0001] The present invention relates to the field of microfluidic technology, and more specifically, to a microfluidic device. Background technique [0002] In the prior art, the principle of electrowetting is usually used to control the flow position of the liquid in the microfluidic device by setting at least one substrate voltage. In the process of driving the automatic movement of liquid droplets, there will be changes in the size of the liquid droplets and the residue of liquid droplets on the electrode, which will affect the accuracy of subsequent tests; Specific location for precise control. [0003] However, in the prior art, the drive electrodes are all set completely. When detecting the droplet position through the sensing electrodes arranged on one side of the drive electrodes, only the droplets at a specific position of the drive electrodes can be detected, for example, only at least Part of the droplet located in the gap between two adjacent dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L3/00
CPCB01L3/50273B01L2200/143B01L2300/047B01L2300/0645B01L2400/0427B01L3/502792B01L3/502715
Inventor 章凯迪林柏全席克瑞李伟白云飞粟平
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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