Guide

Rogers PCB Vs FR4 PCB: Features, Advantages and Applications

Rogers PCB Vs FR4 PCB

In the realm of Printed Circuit Board design, the choice of material plays a pivotal role in assessing the performance and reliability of the product, it also determines the efficiency and the cost-effectiveness of the product. There are two main materials widely used, they are FR4 and Rogers. These two materials are mainly used as dielectric substrates used in PCB Fabrication. They carry their own properties and features. It is very important to understand and study the properties and features of both these materials for the design engineers and manufacturing industries to optimize the PCB (Printed Circuit Board) designs.

Rogers Material PCB

Features of Rogers Material

Rogers material is manufactured by Rogers Corporation, which is a dominant manufacturer of highly efficient PCB materials particularly designed for HF (high frequency) and RF (Radio frequency).

  • High Circuit Density: Rogers material has higher circuit densities, enhanced signal speed, and improved reliability in PCBs.
  • Lower Dielectric Constant: Rogers material has a lower dielectric constant typically between 2.2 to 10.2 which helps in lower dielectric losses at higher frequencies. High-frequency application requires stable dielectric constant over a wide range of frequencies.
  • Comply with Industry Standard: Rogers almost complies with UL, IPC, and RoHS industry standards. It has the certification to work with all defense sectors, telecom sectors, automotive, and other critical industrial applications.
  • High Glass Transition Temperature: It has a higher glass transition temperature typically 280 °C. The temperature at which the material changes from a solid state to a rubbery state is called its glass transition temperature.

Advantages of Rogers PCB

  • Low-loss: Rogers PCB has remarkable low-loss characteristics, electrical properties, and stable performance over a wide range of frequencies. They have low dissipation factor which again means low signal loss and enhanced signal efficiency.
  • Better Heat Dissipation: The thermal conductivity of Rogers printed circuit board is higher which helps in better heat dissipation.
  • Stability: Rogers PCB board has very low moisture absorption less than 0.06% showing stable electrical stability in a humid atmosphere.

Applications of Rogers Material

This material is widely used in HF (high frequency) and RF (Radio Frequency) applications as follows

  • Wireless applications like Bluetooth, Wi-Fi, RFID, etc.
  • Microwave Application
  • Antenna Design
  • High-Speed Circuits
  • Radar Applications
  • Defense Sector
  • Aerospace Applications
  • Military-grade Applications
  • Consumer Electronics

FR4 PCB

Features of FR4 (Flame Retardant 4) Material

Imagining our world without electronic devices is next to impossible. All commercial electronics and consumer electronics devices are not possible without a remarkable material called FR4.

  • Flame Resistant: FR4 is a material that is flame resistant and safeguards the device even when the device gets a little bit hot. Generally, for commercial and consumer applications PCBs are made up of FR4 material  (Flame Retardant 4 ). FR4 has a glass transition temperature ranging from 130 °C to 180 °C.
  • Composite Material: FR4 is a type of composite material composed of glass Fiber and epoxy, laminated with copper foil on one or both sides. The Fiberglass provides strength and stability while the epoxy resin gives electrical insulation and thermal resistance. FR4 material contains typically a 60 to 40 ratio of fiberglass to epoxy resin in weight.
  • Widely Used: FR4 material is the most widely used PCB material in the world due to its high electrical properties and low cost.

Advantages of FR4 PCB

  • Stability: FR4 PCB has great mechanical strength and dimensionally stable material so that PCB can tolerate mechanical stress during manufacturing and operation.
  • Good Electrical Insulation: It provides very good electrical insulation between the layers.
  • Good Thermal Resistance: FR4 is thermally stable. It means FR4 PCB has good thermal resistance, and its ability to withstand high temperatures and heat without significant degradation in performance is remarkable.
  • Cheap: FR4 PCB is cheaper compared to Rogers PCB.
  • Flame Retardant: It is Flame retardant meaning that it does not catch fire and is self-extinguishing.

Applications of FR4 material

  • Electrical Insulation
  • Transformers
  • Arc Sheilds
  • Washers
  • Busbars
  • Switches
  • Relays
  • Industrial Wear Applications

Key Differences between Rogers PCB and FR4 PCB

Sr NoRogers PCBFR4 PCB
1Rogers PCB board is higher in priceFR4 PCB is relatively cheaper than Rogers PCB
2Performance better at high-frequencyPerformance is not good at high-frequency
3Dissipation factor of Rogers PCB is less, so losses are less(Df typically ranges between 0.0009 to .0035)The dissipation factor is high, so losses are high(Df typically ranges between 0.02 to 0.04)
4Lower dielectric losses due to a wide range of dielectric constants typically between 2.2 to 10.2Higher dielectric losses due narrow range of dielectric constants typically between 4 to 4.8
5Glass transition temperature range of Rogers PCB is 280°C to 360°CGlass transition temperature range is 130°C to 170°C
6General applications of Rogers PCB are wireless communications, aerospace, defense, microwave, high-speed digital circuits, low-frequency applicationsGeneral applications are consumer electronics, Industrial control systems, etc
7Rogers PCB has good thermal managementNot good thermal management, FR4 PCBs fail at high temperatures compared to Rogers PCB
8Rogers PCB has least moisture absorptionHigh moisture absorption
9Rogers PCB has good chemical resistance so less chance of corrosionMore chances of getting corroded compared to Rogers PCB.
10The shape of a Rogers PCB does not change when temperature changesShape may change when temperature changes

 

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