Single-face controlled multi-electrode cluster digital micro-fluid chip

Abstract

The invention belongs to a microelectronic bio-chip technology field, and concretely provides a single-face controlled multi-electrode cluster digital micro-fluid chip. The chip comprises a lower-layer core component and a upper-layer grounding component, wherein the lower-layer core component comprises a two dimensional stripe electrode cluster array which is interlaced in transversal and longitudinal grid manner and arranged in the same substrate, and an electrode insulating layer is arranged between the transversal electrode cluster array and a longitudinal electrode cluster array. The dimension of the stripe electrodes in transversal and longitudinal distribution on the substrate is controlled to be far less than that of the liquid drop, and the liquid drop is charged to control the liquid drop to move along the direction vertical to the electrode cluster while the plurality of electrodes form the electrode cluster. The chip of the invention makes the liquid drop move on the chip smoother.

Description

technical field [0001] The invention belongs to the technical field of microelectronic biochips, and in particular relates to a digital microfluidic chip. Background technique [0002] The traditional two-dimensional digital microfluidic technology needs to place the droplet between the upper and lower control plates, and apply voltage to make the droplet move between the two plates. For this kind of control chip, the upper and lower plates are strip-shaped electrodes, and periodic voltages need to be applied to them, which greatly increases the complexity of the surrounding control circuits and systems. The existing two-dimensional digital microfluidic technology controlled by unipolar plates mainly has two types: the first one is a two-dimensional unipolar plate composed of square electrode units, although the double-layer peripheral control circuit can be simplified, but Due to the large number of electrodes, as the control precision increases, its complexity increases i...

AI Technical Summary

Problems solved by technology

For this kind of control chip, the upper and lower plates are strip electrodes, and periodic voltages need to be applied, which greatly increases the complexity of the surrounding control circuits and systems.

However, the existing two-dimensional digital microfluidic technology controlled by a unipolar plate mainly has two types: the first one is a two-dimensional unipolar plate composed of square electrode units, although the peripheral control circuit of the double layer can be simplified, but Due to the large number of electrodes, as the control accuracy increases, its complexity increases in a quadratic relationship, which is not conducive to the preparation of large-area microfluidic chips

The second is simply stacking strip electrodes vertically, and using a single electrode as a control unit to drive the droplet movement. This structure is difficult for the droplet movement due to the mutual interference of the stacked electrodes and the large distance between the electrodes.

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