Valveless electrostatic micropump with low reverse drive voltage and double-sided pump diaphragms, and preparation method thereof

A low driving voltage and side pump technology, applied in the field of microfluidics, can solve problems such as elongated distance between electrodes, excessive driving voltage, and increased driving voltage, so as to increase pump output, reduce driving voltage, and improve work efficiency. efficiency effect

Active Publication Date: 2016-04-27
GRIMAT ENG INST CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The pumping volume of microfluid in the pump chamber is the core performance index in the application of micropumps, and the bottleneck faced by the development of electrostatic micropumps is excessive driving voltage
Usually, because the pump membrane often faces the problem of electrostatic adsorption, in order to obtain an appropriate pumping volume, the distance between the electrodes can only be lengthened; the pressure generated by static electricity is proportional to the square of the voltage applied to the electrodes, and the square of the distance between the electrodes Inversely proportional, in the case of limited pump membrane amplitude, this will lead to a synchronous increase of the driving voltage, and usually the driving force and stroke of the micropump are too small at this time, and the pumping volume is low, which limits the application of the micropump, so it is sought Electrostatic micropump technology with low driving voltage has important application prospects

Method used

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  • Valveless electrostatic micropump with low reverse drive voltage and double-sided pump diaphragms, and preparation method thereof

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Embodiment

[0024] A reverse low drive voltage double-sided pump membrane valveless electrostatic micropump, its structure is as follows figure 1 shown. The electrostatic micropump has a vertically symmetrical structure with the pump chamber 5 as the axis of symmetry. The upper and lower sides of the pump chamber 5 are drive units respectively, and the left and right ends are respectively an inlet 6 and an outlet 7; The electrode 1, the insulating layer 2, the isolation layer 4 and the pump membrane 3 are fixed, and the interior of the isolation layer 4 is a discontinuous structure to form a drive unit cavity to ensure the vibration space of the pump membrane 3.

[0025] The material of the fixed electrode 1 is Si with a thickness of 50 μm; the material of the insulating layer 2 is SiO 2 , with a thickness of 10 μm; the material of the pump membrane 3 is Si, with a thickness of 10 μm; the material of the isolation layer 4 is SiO 2 , the thickness is 30μm; the natural frequency of the pu...

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Abstract

The invention discloses a valveless electrostatic micropump with a low reverse drive voltage and double-sided pump diaphragms, and a preparation method thereof in the technical field of microfluidics. The electrostatic micropump is of a vertical symmetrical structure taking a pump cavity as a symmetrical axis, drive units are arranged at an upper side and a lower side of the pump cavity respectively, and an inlet and an outlet are formed in a left end and a right end respectively; each drive unit sequentially comprises a fixed electrode, an insulation layer, an isolation layer and the corresponding pump diaphragm from the outside to the inside, and the interior of each isolation layer is of a discontinuous structure so as to form a drive unit cavity for ensuring a vibration space of the corresponding pump diaphragm; and a deviation degree of a frequency of the reverse drive voltage applied onto each fixed electrode and an intrinsic frequency of the corresponding pump diaphragm is 0-10%, so as to obtain a resonance effect, and thus an amplitude of the corresponding pump diaphragm is increased. According to the electrostatic micropump, the drive voltage needed by the electrostatic micropump is remarkably lowered in case of a fixed structure of the micropump, and a high pump output can be obtained under the low drive voltage, so that the working efficiency of the micropump is increased.

Description

technical field [0001] The invention belongs to the technical field of microfluidics, and in particular relates to a reverse low driving voltage double-side pump membrane valveless electrostatic micropump and a preparation method thereof. Background technique [0002] As an actuator, the micropump is one of the important components in the microfluidic system. It can be used for the delivery of microelectronic liquids and gas coolants, the precise delivery of chemical products and valuable drugs, the delivery of drugs in the human body, and micro-aerospace. Device fuel supply and many other fields. The development of micropumps has become an important symbol of the development level of microfluidic systems. [0003] At present, micropumps designed with MEMS processing technology can be divided into mechanical micropumps and non-mechanical micropumps according to their working principles. At present, the mechanical micropump is dominant, and its unique feature is that one si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B43/04
CPCF04B43/0027F04B43/043
Inventor 姚俊奇魏峰杨志民赵鸿滨
Owner GRIMAT ENG INST CO LTD
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