What is Polyimide PCB

by | Sep 16, 2021 | PCB Designer | 0 comments

Feature Post!

What is Polyimide PCBWhen it comes to choose their right PCB, many large companies stick to the FR4 composition for their PCB. Numerous industries can benefit from the use of FR4 boards since they are cost-effective and versatile. To be honest, there are plenty of other types of printed circuit board materials to choose from than FR4. However, various board types may indeed be better suited to specific applications than the ones listed above.

As an example, polyimide is a substance that you may want to investigate. It is possible that certain polyimide PCB physical properties would work well enough with your company’s circuit requirements. Again, before you proceed for purchasing printed circuit boards, knowing which composition is appropriate will come in handy.

As a result, it is important that you understand the characteristics of polyimide/polyamide PCBs and how they might influence your applications. Let’s dig out more about Polyimide PCB and its advantages.

What is Polyimide PCB?

In addition to polyamides, imide monomers make up polyimides, which are often termed as polyamides. Different man – made and natural polymers are included in this varied category. Silk and wool, for instance, are natural polyamides. On the other hand, polyamides are synthesized in large quantities for PCB manufacture and utilized as board foundations.

What is Polyimide PCB

Imide-containing chemicals are polymerized to generate synthetic polyimides. Processes using bismaleimides and maleic anhydride are most prevalent. SFX PCB is a trustworthy place to have the detailed information on Polyimide PCB, so visit the page to grasp more important facts about it.

Types of Polyimide PCB

A range of chemicals including additives may be employed in the process to generate different forms of polyimides, each with its own set of benefits. Some examples are given below:

Pure Polyamide:

Second generation polyimides, or genuine and clean polyimides, are manufactured without using brominated flame substances or other additions, such as halogens. This makes them thermally durable and temperature resistant compared to other materials currently available.

Third-Generation Polyimide:

Chemical additions increase flammability resistance in third-generation polyimides, which might also help avoid fire hazards. Even while these forms of polyimides appear to be much less thermostable, their shorter drying periods and reduced temperatures allow for faster manufacturing.

Filled Polyimide:

In a filled polyimide, there is a polyimide as well as a filler that work together to create the final product. Thermal resistance and adaptability are provided by the polyimide. However, the filler aids to limit resin shrinking, which assists to minimize crack development even during the curing and drilling operations.

Low- Flow Polyimide:

They are composed of different resins and circulation control devices that decrease the material’s elasticity.

It’s predicted that even more polyimide variants will become widespread in the future.  So, for instance, fourth-generation polyimides are now being developed, which would enhance copper foil adherence and dampness responsiveness, in addition to overall stability.

Benefits of Using Polyimide PCB

Polyimide products are already in great demand, and for this the thanks goes to the material’s durability and adaptability, among many other factors. There are other reasons why polyamides are so popular.

A PCB’s surface layer must be picked based upon that application’s requirements. Because of the following PCB properties, you may want to consider using polyamide:

  • High Flexibility: Adjustable and rigid-flex printed circuit boards are often made using polyimide because of its remarkable flexibility. Although polyimide substances are flexible, they are extremely robust and resistive to bending. Due to this, this is an appropriate choice for any purpose which may demand a certain level of physical endurance.
  • Heat resistant: Polyimides are indeed very heat resistant, and may be used in many different climates and environments. They may operate at temperatures as high as 260 degrees Celsius, which is typically unfriendly. Their thermal expansion is extremely high. It allows them to withstand heat-related damage throughout the production and repair procedures.
  • High Chemical Resistance:

The chemical stability of polyimides allows them to be subjected to a wide range of corrosive substances without deterioration. Especially in operations that involve chemical interaction, this one is important.


  • Excellent Durability:

Along with the chemical and heat resistance, polyimide PCBs can withstand physical force. Moreover, physical and temperature factors won’t affect their form, so they’re perfect for operations that need severe surroundings and quick maintenance. Polyimides also have excellent electrical characteristics, making them an excellent PCB foundation material.

Final Thought

An idea on wide range of printed circuit boards might well be obtained from SFX PCB, containing polyimide flex circuit boards and FR4 boards, along with ceramic boards, copper circuit boards, and even more.

To know more about Polyimide PCB, you may visit the official page of SFX PCB. You may get assistance if you want to use polyimide in your projects

If you’re still confused or unsure about whether polyimide flex circuit boards are the appropriate choice for you. We will be delighted as one of our PCB specialists will be there to assist you. Thank you.

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