A Comprehensive Guide on Kapton PCB–All You Should Know

A comprehensive guide on Kapton PCB – all you should know

Printed circuit boards, otherwise abbreviated as PCBs, are basically just pathways for electric devices. Therefore, all electronics have PCBs to transmit different signals. 

While there are several types of PCBs in the market, in this guide, we will be discussing Kapton PCB. Created back in 1960, Kapton can handle different temperature ranges. That is why it is so versatile and has applications in different projects. It is highly conductive and helps to regulate the heat that’s present within a device.

Table of Contents

What is Kapton PCB?

Kapton PCB

Before we even go further into its applications and benefits, it is imperative that we understand what Kapton PCB is first. For starters, Kapton PCB is a polyimide. In order for you to comprehend Kapton fully, let’s first clarify what a polyimide is.

A polyimide is a combination of both diamine monomers and dianhydride reaction in a condensed environment. Due to its robust nature and stiffness, polyimide has a crucial role to play in various applications. Other features that make it ideal include its inert chemical properties and high range of temperatures it can withstand. 

It is for this reason that polyimides are used more in printed circuit board and many devices across different industries. To mention just but a few applications, polyimide is used in the aerospace industry, weapons, LCDs, gas separations, and most electronic devices. 

Kapton is a polyimide that’s highly conductive. When you need a thin, uniform, and lightweight heater, Kapton is the answer. That is why it is used to control heat in electrical devices. 

Kapton PCB contributes to temperature regulation in the aerospace industry, wind turbines, and automotive interior heating.

Characteristics of Kapton PCB

As we’ve already noted, Kapton PCB can sustain very strong and severe conditions. Even in such conditions, it still maintains its electrical, physical, and mechanical properties. It is an ideal insulator for these reasons. Kapton PCB is/has:

  • Superb chemical and radiation resistance.
  • Versatile and diverse.
  • Ideal for demanding applications.
  • Excellent electrical, physical, and mechanical properties.
  • It can undergo extreme temperatures.
  • Important in labeling applications.

Why do manufacturers opt for Kapton PCB?

Why do manufacturers choose Kapton PCB

PCB manufacturers use Kapton PCB in various devices and applications. This is mostly because it has a superb thermal resistance. But this is not the only reason why you should choose Kapton PCB in the manufacturing process. Other factors include:

  • The Kapton PCB may be utilized in any application that requires a small-sized circuit board, including computing, portable devices, and aeronautical equipment.
  • Impressive torsion effect because of their flexibility. This PCB can flex and shift without altering its thermal or conductivity characteristics.
  • Ensures stronger circuits.
  • Boosts the mechanical stability of light circuits by improving their base material.
  • Simpler assembly process because of the polyimide material.
  • Important for high and low density mountain designs.
  • Superb electrical performance due to flexibility.
  • Steady electric signal movement.

Polyimide substances applied in Kapton PCB

Polyimide Substances Used in Kapton PCB

These polyimide substances include the following:

Low-flow polyimides
Several fillers present. They include flow restrictors and resins. These fillers put a constraint on their flexibility.

Filled polyimides
They have both a polyimide and a filler. The filler’s job is to lessen resins contraction. This, in turn, helps in curing and drilling by cutting down the chances of cracks forming.

3rd generation polyimides
They include several chemicals that aid to strengthen their heat resilience. This can go a long way in curbing electrical fires. Their poor thermal resilience, however, is a drawback. Easier to make as they’re ready within just a short period of time.

Pure polyimides
They have a higher thermal stability because of their resistance to fire.

What kinds of Kapton PCBs are commonly used?

The single layer Kapton PCBs are the most widely used today for many industries and different applications.

Single Layer Kapton PCBs

These PCBs only have metallic particles in one layer. Their foundation is made up of a copper foil, a sticky backing, and a Kapton polyimide. This PCB’s other face has a solder mask and a connector section.

Advantages of Kapton PCB

A Kapton PCB has several advantages. The main purpose of creating Kapton PCBs was to boost stability and efficiency. Here’s why to use Kapton PCB:

Great flexibility
Kapton PCB is quite flexible in movement and bending. Normal boards lack this kind of flexibility, which is crucial for some electronic devices.

Kapton PCB is endurable. This makes it also have a high durability and the capability of dealing with excessive physical stress.

Thermal power stability
Since Kapton PCB has a high thermal power stability, it can work in high temperatures without any damages.

Enhanced signal movements
With a Kapton PCB, the electronic device will have an enhanced signal movement, which makes it more efficient.

Better power efficiency
Helps to cut down on power usage by improving the power efficiency in the electronic devices.

Applications of Kapton PCB

Applications of Kapton PCB

What are some of the areas that you can apply Kapton PCB?

  • Aerospace industry
  • Weapons industry
  • LCDs
  • Gas separations
  • Military equipment
  • Auxiliary equipment
  • Electric gadgets
  • Mobile and telecommunication devices
  • Most electronic devices such as computers

Considerations for choosing a Kapton PCB

Considerations for Choosing a Kapton PCB

There are several factors that you should have at the back of your head when choosing a Kapton PCB, which include:

  • Resistance to chemicals
  • Thermal stability
  • Low CTE
  • Glass transition temp
  • How much the Kapton PCB will cost
  • Impact protection ratings
  • How easy the replacement procedure is
  • Dielectric constant
  • Tensile prowess
  • The durability and endurance of the Kapton PCB

Final thoughts

We do hope that this guide on Kapton PCB has benefited you. The application and uses of a Kapton PCB are wide and increasing. This is why getting the right manufacturer to work with is more crucial than ever. 

At IBE, we are always ready to work with you in achieving your goals. We use our long experience to improve your operations and your products. Feel free to check out IBE electronics for more content. Our in-depth knowledge in PCB assembly (PCBA), helps us meet our customers’ assembly needs. Our solutions are tailor-made for your business. You are highly welcome to work with us.

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