Manufacturing method of ink-jet printing digital micro-fluidic chip

Abstract

The invention provides a manufacturing method of an ink-jet printing digital micro-fluidic chip, which comprises the following steps of: 1, designing an electrode circuit pattern to be printed, and preparing a thin film serving as a dielectric layer; 2, according to the electrode circuit pattern, using an ink-jet printer for carrying out ink-jet printing of nanoscale conductive ink on one face of the dielectric layer so as to carry out single-layer circuit printing or complex circuit printing; and 3, coating the other surface of the dielectric layer with a hydrophobic layer. According to the manufacturing method of the ink-jet printing digital micro-fluidic chip, high-precision resolution ink layer control is carried out by utilizing ink jet of an ink-jet printer, the problems that steps are generated in an electrode gap and liquid is blocked are solved, the problem of separation of an electrode and a lead is solved, and the influence of short circuit in a complex circuit design is effectively avoided. The ink-jet printing process is relatively simple, low in cost and high in precision, is suitable for repeated test requirements of the digital micro-fluidic chip in the research field, can greatly improve the working precision and efficiency of the digital micro-fluidic chip, and has practicability.

Description

technical field [0001] The invention belongs to the intersection field of digital microfluidic technology and printing technology, and in particular relates to a method for manufacturing an inkjet printed digital microfluidic chip. Background technique [0002] Micro-total analysis system, also known as lab-on-a-chip, mainly integrates the sample preparation, reaction, separation, detection and other operations involved in routine experiments on a micron-scale chip. An emerging research field emerging from the intersection of disciplines, biomedicine and other disciplines. Microfluidics is an important supporting technology in the micro-total analysis system. The microfluidic chip is prepared on the basis of micro total analysis system (MEMS) technology to realize the miniaturization, integration, low cost and high efficiency of the analysis system. [0003] Microfluidic chip is an emerging concept in the field of microfluidics. In a broad sense, it refers to a series of ...

AI Technical Summary

Problems solved by technology

In addition, in order to avoid the short-circuit problem of the multi-layer electrode wire layer, PI film is additionally used as the insulating layer to separate the electrode and the wire. However, due to the weak physical strength of the PI film, it is extremely easy to be damaged, which will also bring difficulties to the processing technology.

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