Polyimides for Micro-electronics Applications

Abstract

Polyimide is an organic polymer that exhibits the highest level of heat resistance, exhibits excellent mechanical properties and electrical insulation, and is stable for a long period of time. In addition, since it is easy to obtain polymers with different physical characteristics by changing the combination of monomers, it is possible to obtain the desired properties according to the application, and it is used in a wide range of fields such as insulating protective films for semiconductors and electronic components. This chapter describes polyimides used in microelectronics applications such as semiconductors, electronic components, displays, image sensors, and lithium-ion secondary batteries. The development of practical aspects such as photosensitivity, low-temperature curability, and adhesion to copper when used in microelectronics will be described.

Examining the Mechanism of Current Conduction at Varying Temperatures in Polyimide Nanocomposite Films

“…We determined the γ parameter by calculating it from the slope of the fitted curves, as depicted in Figure 7, using Equation (9). With the knowledge of ε r and the experimental slope, γ can be computed, as summarized in Table 2.…”

“…Adding aromatic heterocycles to PI's main chain makes it much more stable at high temperatures and under pressure, and also makes it less likely to conduct corona. Additionally, due to PI's excellent electrical insulation properties, it has garnered significant interest as an inter-turn insulation material for variable-frequency traction motors [8,9]. Nevertheless, conventional PI and other polymer insulating materials are susceptible to failure after exposure to corona and prolonged damp heat aging, necessitating modifications to meet the ever-increasing demands of various applications [8][9][10][11][12][13].…”