May 21, 2023
Comparison of PCB Materials for High Speed and HDI PCB Boards

Comparison of PCB Materials for High Speed and HDI PCB Boards

As a user or designer of electronic boards, you might have questions about the different types of materials used for PCBs. This article will try to answer some of those questions by comparing the properties of high-speed and HDI boards.


High-speed and HDI PCB boards are used in industrial applications, including power supply systems and embedded computers. These boards must be able to withstand high temperatures and pressures without compromising performance or reliability.

The most common materials used to construct such boards include FR4 (flexible), P/N 0603-sized SMT pads, conductive plastics (low permittivity), Kynar wire insulation, or glass epoxy board with copper foil connections on both sides of the board.

This article compares these materials based on their mechanical properties such as tensile strength, modulus of elasticity, and Young’s modulus along with electrical characteristics such as capacitance value per square inch when subjected to various environmental conditions such as humidity range from 20% humidity up to 80% humidity; temperature range from -40°C up until +100°C; shock resistance while handling drop heights up until 5mm each time


PCBs are a type of electronic circuit board that can be used to make all kinds of electronics. The first PCBs were developed in the 1950s when transistors were still relatively new and expensive. Although there have been many improvements over time, one thing remains constant: they’re still made with paper (or other lightweight material) on top of a laminate substrate.

In recent years, high-density integrated circuits (HDI) have become popular because they allow for more space between layers while maintaining high-speed operation under great heat conditions. This means that HDI boards can be used even more effectively in applications where general-purpose circuit boards would not work well—such as military equipment or medical devices used inside patients’ bodies!

Basic Properties of PCB Materials

A variety of properties are important to consider when selecting a material for your PCB. These include:

conductivity (dielectric constant)

thermal expansion

dielectric strength or breakdown voltage, which determines the amount of shock that can be tolerated without damage to the board

resistance to environmental factors such as humidity, temperature, and moisture

The dielectric constant (ε) is a measure of how strongly an insulator resists a charge flowing through it in one direction only. It’s expressed as higher numbers mean more resistance — like being able to stop more charges from moving through something than if you have one with lower ε values but higher conductivity levels.

Related: Thrasio 100m 750m Serieslundentechcrunch

High-Speed PCB Materials

High-Speed PCB Materials

  • FR-4
  • G10
  • G11
  • FR-2
  • FR-1

HDI Board Materials

As a user or designer of electronic boards, you might have questions about the different types of materials used for PCBs.

HDI boards are made of FR4 with a glass or ceramic core. They are used in high-speed applications and the most common material used is FR4. These boards can be used for both high-power and high-density applications, but if you want to use them for high-density applications, then you will need an HDI board made of a special polymer that has been designed specifically for this purpose.

There are two main types of materials available: one type is made from plastic (polyethylene), while another type is composed entirely of glass fibers (glass-reinforced epoxy resin). Both types have advantages and disadvantages over each other; some people prefer one over another because it makes more sense based on their needs or wants at any given time


In this article, you learned about the differences between high-speed and HDI PCB boards. You also learned about the different types of materials used for these two types of applications.

High-speed and H-DIPC boards differ in several ways: they have different requirements regarding material quality; they have different mounting requirements; they require different methods for connecting components (such as vias); and they have different electrical characteristics.

Related: Tips and tricks to use the Amazon Flex bot effectively

Within the electronic board industry, there are materials that have historically been used specifically for high-speed and HDI boards.

On the surface, a lot of these materials are similar. They all have high conductivity and low dielectric constant values, so they can be used in high-speed and HDI boards. However, there are also significant differences between them that make each one more appropriate for certain applications than others.

The following table summarizes some of these characteristics:


The material used for electronic boards has evolved over time. Today, there are many different types of materials that can be used in various applications such as high-speed and HDI boards. We hope that this article provided some insight into which type of board material will be best suited for your application!

Leave a Reply

Your email address will not be published. Required fields are marked *