Why choose H-grade polyimide film as interlayer insulation material for copper foil?

The reason for choosing H-grade polyimide film as interlayer insulation material for copper foil is usually due to its excellent performance and applicability. Here are some of the main reasons for choosing H-grade polyimide film:

High temperature performance: H-grade polyimide film has excellent high temperature performance and is generally stable at temperatures above 150°C. This is critical for electronic devices, circuit boards, and other high temperature applications.

Electrical insulation performance: H-grade polyimide film has good electrical insulation performance, which can effectively isolate the copper foil layer to prevent short circuits or circuit interference. This is especially important for high-density circuit boards and radio frequency (RF) applications.

Mechanical properties: H-grade polyimide film generally has good mechanical properties such as bending strength and wear resistance, making it suitable for a variety of engineering applications, including flexible electronic devices and thin film circuit boards.

Chemical stability: This polyimide film is chemically resistant and can resist corrosion from certain solvents and chemicals, thereby enhancing circuit stability.

Film thickness control: H-grade polyimide film can be manufactured into very thin layers, which allows for precise control of the spacing between copper foils, which is critical for high-density circuit design.

Radiation resistance: H-grade polyimide film generally has good radiation resistance and is suitable for application in certain radiation environments.

It should be noted that the price of H-grade polyimide film is relatively high, and material selection should take into account both performance requirements and cost. In addition, specific application requirements and environmental factors will also affect material selection, so various factors need to be carefully evaluated based on the specific situation.