Common substrate materials for flexible pressure sensors

The base of the flexible pressure sensor is made of flexible materials with properties such as soft texture, easy bending, and light weight. Common flexible materials include: polyimide (hereinafter referred to as PI), polydimethylsiloxane (hereinafter referred to as PDMS), paper sheets, textile materials, etc. PI is one of the organic polymer materials with the best comprehensive performance. It has good mechanical properties, excellent radiation performance, high tensile strength, long-term use temperature up to 250 ℃, chemical resistance, and generally insoluble in organic solvents. , It has advantages such as stability to enoic acid, but its hydrolysis resistance is poor. At present, in the research of more flexible substrate materials, PDMS is convenient and easy to obtain, transparent, chemically stable and thermally stable. Under ultraviolet light, its adhesion and non-adhesive areas have obvious characteristics, so that the surface can be easily adhered Electronic materials have become the preferred substrate material.