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The use of Kapton as a substrate for manufacturing flexible printed circuits

Kapton tape application
  • A printed circuit board (PCB) is a circuit board in which electronic components are mechanically supported and connected using conductive paths such as tracks and alignments laminated with copper.
  • Thus, basically, printed circuit boards are intended to support paths in electronic devices. Every electronic device consists of a printed circuit board because this is how signals are transmitted within the electronic device.
  • Once you understand simple printed circuits, there are flexible printed circuit boards. You can develop your interface requirements and depending on your requirements, flexible printed circuits can be manufactured using polyamides such as Kapton as a substrate.
  • Flexible printed circuit boards are another type that is made by using thin layers of polymer film (i.e. Kapton) with conductive patterns with traces on the substrate. So we can say that Kapton is responsible for the flexibility of the printed circuit board.
  • Electrical equipment is often exposed to the harshest temperatures that may exceed levels. If the right material is not used, the equipment may get damaged.
  • To overcome this problem, polyimide should be used that can withstand the rising temperature conditions. Since 1960, Kapton is the best choice to solve this problem.
  • The main reason for using Kapton in electronic devices is thermal exposure.
  • Flexible PCBs can range from single to double layer. But polyimide Kapton base layers will be found in every type of printed circuit board.

Advantages of using Kapton PCBs

Kapton printed circuits serve many fields. The flexibility of Kapton circuit boards is an essential requirement for many electronic devices. Here are the advantages of using Kapton printed circuit boards:

  • Kapton printed circuit boards are designed in such a way that they are able to accommodate higher and lower-density mountain designs and can be made more flexible.
  • Kapton helps to minimize the assembly process and increases reliability through it. Miniaturization and signal flow in electronic devices can only be improved with Kapton printed circuit boards.
  • The circuit substrate has a thick polyimide film including copper foil. Additional mechanical stability and strength can be enhanced by reinforcing the substrate of the circuit. In this way, the strength of the circuit is also increased.
  • Flexibility, as the name suggests, the Kapton circuit is flexible, so it can also bend, move and twist in effect. And the electrical conductivity is not destroyed by this flexibility, and this flexibility provides Kapton circuits with excellent electrical properties. Due to the low dielectric constant, electrical signals flow well. When heated, the components can be cooled immediately due to their good thermal properties. In addition, due to the high glass transition, the components work well in extreme temperature ranges.

Another major advantage of using Kapton printed circuit boards is that you can reduce the size of the board required for many applications. Many electronic devices such as laptops, computers, military equipment, aerospace, PDAs, peripherals, digital devices, mobile communications, and many others require smaller sizes and lighter weight.

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