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Silicon-based electronic products have gradually been unable to meet environmentally friendly requirements. Flexibility, environmentally friendly, high efficiency and low cost are becoming important directions. The biggest challenge is how to produce environmentally friendly sensors. Here, paper-based materials are selected as the substrate, which can meet the requirements of environmentally friendly. The direct writing technology with low-cost is selected for preparation. We formulated a liquid precursor material for direct writing ink. Ink does not need to synthesize nano materials in advance, as long as it is prepared according to the method mentioned above, and the preparation method is simple and short in time. Combining low-cost direct writing preparation technology, it can realize low-cost and efficient preparation of green and environmentally friendly flexible devices. Using direct writing technology, the ink was directly written onto the surface of the paper substrate, and the influence of direct writing parameters on the preparation structure was studied. The device obtained by direct writing is put into an oven and heated, so that the precursor ink is transformed into a silver micro-nano structure. The influence of different temperatures on the formation of silver structure was studied, and it was concluded that the effect was best when the temperature was 100 degrees Celsius. The prepared paper-based sensor is then used for finger bending signal detection. It can detect the bending of the finger very well. The method is simple, high-efficiency, low-cost, and can prepare a flexible and environmentally friendly force-sensitive sensor. Based on this method, it can also be used for the preparation of other devices.
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