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Polymer flexible interdigital electrode and processing method thereof

A technology of interdigitated electrodes and processing methods, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as large noise and errors, changes in electrical characteristics of conductive gel, complex production processes, etc., and achieve stable electrical signal baselines , Improve wearing comfort and high detection sensitivity

Inactive Publication Date: 2016-10-12
HUIZHOU LEADAO ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Moreover, in the prior art, most of the electrode substrates are made of rigid materials such as opaque ceramic sheets, whose electrical conductivity can no longer meet the requirements for high electrical conductivity and high sensitivity of the electrodes in the biomedical field, and the materials have relatively high hardness, making it difficult to wear greater discomfort
[0005] Silver / silver chloride (Ag / AgCl) electrode, as a biomedical electrode widely used in bioelectric detection technology, is generally composed of electrode core, Ag / AgCl layer, conductive gel, non-woven fabric and other components, Ag The Ag / AgCl layer is usually formed by electroplating / electrolysis and other processing techniques, the production process is relatively complicated, and the production cost is high. Moreover, due to the existence of conductive gel, the Ag / AgCl electrode is prone to dehydration and drying during use, making the electrolytic properties of the conductive gel Some changes in characteristics, can not be used continuously for a long time
At the same time, it is precisely because of the instability of the electrical impedance of the conductive gel that it is easy to introduce large noise and errors in high-precision experiments, resulting in inaccurate measurement results and greatly reducing the conductivity of the interdigitated electrodes.
In addition, before using the Ag / AgCl electrode, the skin must be effectively treated, and the stratum corneum on the skin surface must be wiped off as much as possible. A certain amount of preparation time is required, otherwise the conductive gel may cause skin allergic reactions, redness, swelling, etc. making certain measurements difficult to perform

Method used

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  • Polymer flexible interdigital electrode and processing method thereof

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Embodiment 1

[0033] This embodiment provides a polymer flexible interdigital electrode, the interdigital electrode from bottom to top is: substrate 1, buffer layer 2 and conductive layer 3; wherein, the substrate material is composed of polydimethylsilane; The above-mentioned conductive layer is a metal layer formed of Ag.

[0034] The buffer layer is an alloy layer formed of Ti / W (mass ratio is 1:1); the thickness of the substrate is 0.1 mm, the thickness of the buffer layer is 25 μm; the thickness of the conductive layer is 20 μm.

[0035] The surface resistivity value of the polymer flexible interdigitated electrode at 25 ° C circuit is 1.80 × 10 -8 Ω·m.

Embodiment 2

[0037] This embodiment provides a polymer flexible interdigital electrode, the interdigital electrode from bottom to top is: substrate 1, buffer layer 2 and conductive layer 3; wherein, the substrate material is natural rubber; the conductive layer A metal layer formed for Pd.

[0038] The buffer layer is an alloy layer formed by Mo / W (the mass ratio of Mo and W is 1:1); the thickness of the substrate is 0.48 mm, and the thickness of the buffer layer is 25 µm; the thickness of the conductive layer is is 20µm.

[0039] The surface resistivity value of the polymer flexible interdigitated electrode at 25 ° C circuit is 1.92 × 10 -8 Ω·m.

Embodiment 3

[0041] This embodiment provides a polymer flexible interdigital electrode, the interdigital electrode from bottom to top is: substrate 1, buffer layer 2 and conductive layer 3; wherein, the substrate material is polyimide; the The conductive layer is a metal layer formed of Au.

[0042] The buffer layer is an alloy layer formed of Mo / W (the mass ratio of Mo and W is 1:1); the thickness of the substrate is 0.48 mm; the thickness of the buffer layer is 10 μm; the thickness of the conductive layer is 10 μm.

[0043] The surface resistivity value of the polymer flexible interdigitated electrode at 25 ° C circuit is 1.92 × 10 -8 Ω·m.

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Abstract

The invention provides a polymer flexible interdigital electrode and a processing method of the polymer flexible interdigital electrode. The interdigital electrode comprises a substrate, a buffer layer and conducting layer in the sequence from bottom to top, wherein the substrate is manufactured by a polymer flexible material; and the conducting layer is a metal layer. The polymer flexible interdigital electrode has the advantages of good conductivity, high fitting degree with the human skin, no irritation to the skin, steady electric signal baseline, strong anti-jamming capability and multi-time use availability.

Description

technical field [0001] The invention belongs to the technical field of bioanalysis and detection, and in particular relates to a polymer flexible interdigital electrode which can be used for biomedical detection and its processing method and application. Background technique [0002] Biosensor technology is a very active field of engineering technology research. It is in the intersection area of ​​life science and information science together with bioinformatics, biochip, biocybernetics, bionics, biocomputer and other disciplines. An indispensable advanced detection and monitoring device. As a sensor that can effectively convert the ionic potential generated by the electrochemical activities of organisms into the electronic potential of the measurement system, the biomedical electrode is widely used in modern clinical detection and biomedical measurement. In the process of bioelectrical signal acquisition and utilization, biomedical electrodes are widely used in modern clin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0408A61B5/0478A61B5/0492A61B5/053A61B5/296
CPCA61B5/0536A61B2562/0209A61B5/25A61B5/291A61B5/296
Inventor 崔皓博黄兴桥范玥
Owner HUIZHOU LEADAO ELECTRONICS MATERIAL
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