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What are the Different Fabric Styles of Fiberglass Used in the Isola IS400 PCB Material?

In this article, we will be revealing to you all the necessary information concerning the Isola IS400 PCB Material. This is another PCB material that can serve different PCB needs as well as different applications.

Therefore if you have any questions or you wish to be knowledgeable in this regard, please keep reading.

What is the Isola IS400 PCB Material?

The Isola IS400 PCB Material is described as a prepreg and laminate that serves multilayer printed circuit board applications, which require a thermal performance that is demanding as well as high reliability.

This Isola material works with proprietary technology and features the fiberglass fabric. In addition, it features a low coefficient of thermal expansion at the Z-axis. Furthermore, its decomposition temperature value is 330°C.

Features of the Isola IS400 PCB Material

The following are the main properties of the Isola IS400 PCB Material

  • Its temperature for glass transition is 150°C
  • Also, it makes use of fiberglass fabric (E-glass)
  • The laminate appears as a full-size panel sheet having a thickness that ranges between 0.05 – 2.4 mm
  • Its dielectric constant is 3.90, while its dissipation factor is 0.022
  • The prepreg also comes as a roll or panel
  • Furthermore, it makes use of HTE or RTF copper foil of grade 3

Applications of the Isola IS400 PCB Material

This Isola prepreg material and laminate is majorly useful in the transportation and automotive industry. Furthermore, the Isola IS400 PCB Material is very useful in the PCB industry because its thermal resistance is high.

Resin System Type Used in the Isola IS400 PCB Material

The Isola IS400 PCB Material makes use of the epoxy resin system that has very low costs of material. Also they ensure different formulation variations.

Also, epoxy resins’ temperature of glass transition falls within 110 – 170°C. However, this type of resin system works fine with most PCB fabrication processes of Isola.

Enhancing the Copper Bond Present in the Isola IS400 PCB Material

The Isola laminates can experience failure of the copper bond due to shear that is produced in a thermo-mechanical way or an oxidation happening underneath the foil.

There are some copper treatments available, which both reduces the impacts of the attack from secondary oxidation, as well as enhances the bond.

This copper foil is treated by the growing nodules of copper that gives the bonding some “tooth” asides from the normal grain structure.

Also, in order to reduce any oxidation attack, the nodules are oxidized lightly by the manufacturers. Later on, they are treated subsequently using zinc or brass.

Furthermore, in some cases, they make use of nickel with treatments of chromate conversion as well as supplementary inhibitors of oxidation.

Different Fabric Styles of Fiberglass Used in the Isola IS400 PCB Material

The production of the Isola IS400 PCB Material makes use of different fabric styles of fiberglass. Whatever style of glass fabric you decide to use has to do with the amount of resin that it can possibly hold for filling and bonding.

However, the selection also has to do with the manner in which the style of fabric will affect how thick the printed circuit board will be or the completed Isola laminate.

Moreover, some options rely mostly not just on the thickness of the laminate but also on the secondary features. These include the cost, CTE control, stiffness, dimensional stability, and the dielectric constant.

Below are some of the commonly-used fabric styles for fiberglass when dealing with the Isola laminates. These include 7628, 2313, 2116, 1080, 106, and 104.

Fabrics that have lightweight and have their resin contents high usually provide resin-rich and smooth laminate surfaces. In addition, they make sure that there’s a superior fill present in the inner patterns.

Furthermore, fiberglass fabrics that are heavier provide a better dimensional stability. Also, it ensures the construction of a thicker Isola IS400 PCB Material at a reduced cost.

Also, making use of heavier fabrics, most especially the 7628, can affect the surface smoothness and drilling characteristics.

In addition, the heavy fabrics may be useful sometimes in the Isola IS400 PCB Material. This helps in reducing any costs that may break or deflect small drills.

What Differentiates the E-glass and the S-glass Fabric of the Isola IS400 PCB Material?

Denoted accurately as S2-Glass, the S-Glass has to do with a fiberglass of high-strength, which was initially developed to serve structural sectors.

This fiberglass type useful in the Isola IS400 PCB Material is quite different from the E-glass present in the composition and properties.

In composition terms, the S-Glass is made of a larger percentage of Silicon Dioxide and Aluminum Oxide, in contrast to E-Glass.

It is much more difficult to manufacture it compared to E-Glass because it requires a special drawing procedure. Also, it requires a melting point that is higher.

Also, the dielectric constant and the dissipation factor of the S2-Glass is lower in contrast to that of E-Glass. This is as a result of the higher percentage of silicon dioxide.

However, this fiberglass also features a lower coefficient of thermal expansion in contrast to the E-glass. Moreover, similar to the E-Glass, it is possible to place finishes on the S-Glass.

What this implies is that it works fine with virtually all resin system types for the Isola IS400 PCB Material. Therefore, use the S2-Glass whenever you need an enhancement in the dielectric constant and/or the coefficient of thermal expansion.

Quality Certifications of the Isola IS400 PCB Material

Yes, there are some necessary quality certifications, which the Isola IS400 PCB Material ought to have. These include the

  • RoHS Certification
  • BSI Certification
  • CE Certification
  • UL Certification
  • REACH Certification

Etching and Imaging the Isola IS400 PCB Material

Yes you can image the Isola IS400 PCB Material making use of conventional dry films. Furthermore, these Isola laminates works fine with cupric chloride and ammonia etchants


Depending on what your requirements are, we at RayMing PCB offer high-quality Isola IS400 PCB Material as well as other Isola PCB materials and laminates. Contact us today to get the best value for your money!