Assembled type biosensor chip

Abstract

The invention relates to an assembled type biosensor chip. A signal acquisition circuit and a biological signal acquisition working electrode are located on a first surface layer and a second surfacelayer of a first base material layer; the signal acquisition circuit and the biological signal acquisition working electrode are connected through a first conducting hole; a signal acquisition reference electrode is located on a first surface layer of a second base material layer; the first base material layer and the second base material layer are electrically connected through a conducting convex point; the signal acquisition working electrode is aligned to the signal acquisition reference electrode and a gap is formed between the two electrodes; detected liquid (such as sweat) flows throughthe gap to react with a functional thin film modified on the surface of the working electrode, so as to generate current or electric potential; and the signal is amplified, filtered and acquired by the signal acquisition circuit and then is sent to a main control circuit for processing. The sensor chip assembled by the structure has the advantages of short signal transmission path and small signal path interference; the two electrodes are aligned to each other and an electric field between the two electrodes is more uniform and stable; the liquid is easier to flow in the capillary gap, conditions of electrochemical reaction are more stable and the signal stability is good; and the integration level is high.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to an assembled biosensor chip. Background technique [0002] Electrochemical analysis of biological signals is a common method. Generally, it can detect biological urine, sweat and blood, and detect liquids and gases at the molecular level. [0003] At present, conventional detection methods in the industry are limited by sensor design and reaction conditions, and are all carried out in professional institutions or large hospitals, with large equipment and complicated operations. On the other hand, bioelectrical signals are generally relatively weak (nA level, mV, μV level), and traditional electrochemical sensors usually make the sensor very large to make the response current as large as possible, thereby reducing the difficulty of signal acquisition. It is determined that his equipment system cannot be made small, cannot be promoted at the consumer level, and is not easy to carr...

AI Technical Summary

Problems solved by technology

[0003] At present, conventional detection methods in the industry are limited by sensor design and reaction conditions. They are all carried out in professional institutions or large hospitals, with large equipment and complicated operations.

On the other hand, bioelectrical signals are generally relatively weak (nA level, mV, μV level), and traditional electrochemical sensors usually make the sensor very large to make the response current as large as possible, thereby reducing the difficulty of signal acquisition. It is determined that his equipment system cannot be made small, cannot be promoted at the consumer level, and is not easy to carry

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