Adhesive-coated polyimide film was one of the first polyimide commercial products, originally used for slot insulation and cable wrapping materials for motors. At present, polyimide film has a wide range of applications: it can be used for insulation of space technology devices, F, H-class motors, and electrical appliances. PI films in these fields are called "electrical-grade PI films";
It can also be used in flexible substrate materials (ie, flexible copper clad laminates) and their matching cover films (also known as protective films) for the manufacture of flexible printed circuit boards, as well as in the flexible substrates used in integrated circuits. In packaging, PI films in these fields are called "electronic grade PI films"; they can also be used in other fields such as amorphous silicon solar cells.
Polyimide (PI) is one of the organic polymer materials with good comprehensive properties. It is a variety of polymer materials with high heat resistance (+400°C) that has been industrialized. It has been widely used in aviation, aerospace, microelectronics. , nanometer, liquid crystal, separation film, laser and other fields. All countries are listing the research, development and utilization of polyimide as one of the promising engineering plastics in the 21st century.
It is at the top of the pyramid of polymer materials, known as "problem solver", and believes that "without polyimide, there would be no microelectronics technology today".
In recent years, inorganic molecules have also appeared in LB films. Inorganic molecules are generally mixed with amphiphilic organic molecules (such as fatty acid molecules) to make LB membranes. Because inorganic molecules often exist in the film in the form of nanoparticles. At this time, the periodic structure of LB9 is destroyed to a certain extent, but this film and the disordered film formed by directly dropping the same solution on the surface of the substrate "still" It plays an important role in improving some properties of organic molecular LB films (such as mechanical strength, thermal stability, etc.).
Amphiphilic polymers are also getting more and more attention. Amphiphilic polymer molecules have many hydrophilic groups and hydrophobic groups. The reason is that their molecules are relatively high. Therefore, membranes made of such materials have higher mechanical stability and thermal stability than membranes made of other materials. Stability. Such films generally do not possess macroscopic long-range order. The original polymer LB glue is a LB film formed by the polymerization of long aliphatic chain molecules and living vinyl.
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