Conductive rubber is a kind of adhesive with certain conductivity after curing or drying. It is usually composed of matrix resin and conductive filler, namely conductive particles, and combines conductive particles together through the bonding action of matrix resin to form conductive path and realize the conductive connection of the adhesive material. Because the matrix resin of conductive rubber is an adhesive, it can be bonded at a suitable curing temperature. For example, epoxy resin adhesive can be cured at room temperature to 150 ℃, which is far lower than the soldering temperature of more than 200 ℃ for tin-lead welding, which avoids the material deformation, thermal damage of electronic devices and the formation of internal stress that may be caused by high welding temperature. At the same time, due to the rapid development of miniaturization and miniaturization of electronic components and high-density and highly integrated printed circuit boards, the minimum pitch of 0.65mm for lead-tin welding is far from meeting the actual requirements of conductive connection, while conductive rubber can be made into paste to achieve high line resolution. Moreover, the conductive rubber process is simple and easy to operate, which can improve production efficiency and avoid environmental pollution caused by heavy metal lead in tin-lead solder. Therefore, conductive rubber is the ideal choice to replace lead-tin welding and realize conductive connection.

Conductive rubber is a kind of composite conductive polymer material. Composite conductive polymer material means that the polymer material itself does not have conductivity, but the product has conductivity by adding conductive fillers, such as carbon black, metal powder foil, and other methods such as dispersion composite, layer-based composite, and surface composite. Among them, dispersed composite is the most commonly used.

At present, conductive rubber has been widely used in the packaging and bonding of electronic components and components such as liquid crystal display (LCD), light emitting diode (LED), integrated circuit (IC) chips, printed circuit board components (PCBA), dot matrix blocks, ceramic capacitors, film switches, smart cards, radio frequency identification, etc., with the trend of gradually replacing the traditional soldering welding.