Classification of Microarray Chips

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A biochip or microarray chip is a microscope slide for the laboratory, usually made of silicon chip, glass, nylon film. It is usually a 2D array (sometimes 3D) with thousands of microwells at defined locations on the chip surface. The microarray chip analysis technology was discovered almost 20 years ago. The technology is mainly used in cancer research and drug treatment of other diseases, such as oral lesions. It helps researchers investigate and analyze the expression of thousands of genes in a single reaction and solve a variety of questions.

The working principle of microarray technology is the binding of DNA complementary sequences to each other. There are different classifications of microarrays based on how they are prepared and the types of probes used.

Ⅰ. Based on the classification of preparation methods, microarray chips can be divided into three categories