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Plastic chip for electrochemical test and preparing method thereof

An electrochemical and chip technology, which is applied in the fields of electrochemical variables of materials, material analysis by electromagnetic means, measurement devices, etc., can solve the problems of high chip price, failure, and easy contamination of electrodes, and achieves easy manufacturing and low cost. Effect

Inactive Publication Date: 2006-02-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chip is expensive due to the use of precious metals, which is not conducive to the promotion and application of this chip, and for electrochemical chips, the electrodes are easily polluted and invalid.

Method used

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  • Plastic chip for electrochemical test and preparing method thereof
  • Plastic chip for electrochemical test and preparing method thereof
  • Plastic chip for electrochemical test and preparing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The production steps are as follows:

[0019] 1. Make the required silicon wafer template by photolithography.

[0020] Two, the channel is made on the PMMA sheet with the method of hot pressing (such as figure 2 Shown), punch holes in the corresponding position to apply high pressure.

[0021] 3. Drill holes at the corresponding positions on the other PMMA sheet.

[0022] 4. Seal two pieces of PMMA sheets together by hot pressing.

[0023] 5. Grind the end away from the high-pressure hole with metallographic sandpaper.

[0024] 6. Glue a carbon fiber with a diameter of 6 μm to the outlet of the separation channel with epoxy glue, and carefully place the carbon fiber in the center of the outlet (such as image 3 shown). Use conductive glue to lead out the carbon fiber and connect the wires. The conductive glue is coated with a layer of epoxy glue.

[0025] 7. Use the industrialized PCB gold-plated board production process to produce PCB boards with high-voltage ...

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Abstract

A plastic chip is made by sticking chip formed with two layers of PMMA board to a layer of PCB board as operation electrode is set on chip, high voltage electrode, electrochemical detection electrode or named as reference electrode, counter electrode and high voltage earth electrode are set on PCB board; and electrochemical detection pool is made on tail end of separation channel.

Description

Technical field: [0001] The invention relates to a chip for electrochemical detection and a preparation method thereof. Background technique: [0002] In chip electrophoresis, laser-induced fluorescence has become the mainstream detection method due to its high sensitivity. However, the laser light source and the translation platform necessary for the laser-induced fluorescence detection method need to be further reduced in size to adapt to the size of the chip. As a common detection method in capillary electrophoresis, electrochemical detection is also widely used in the detection of chip electrophoresis. In the electrochemical detection method, the fabrication of microelectrodes can be manufactured by the process related to chip manufacturing. Since electrochemical detection is based on the oxidation-reduction reaction of substances on the electrode surface and has nothing to do with the optical path, miniaturization cannot reduce sensitivity. Moreover, the cost of the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26G01N27/30G01N27/447
Inventor 姜雷秦建华刘兆奕戴忠鹏林炳承
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI