FR-2 PCB Laminates
FR-2 or Flame Retardant 2 is the NEMA designation for Synthetic Resin Bonded paper made up of phenol formaldehyde resin which is used as Printed Circuit Board Laminates having a glass transition temperature as high as 105 Degrees.
They provide excellent electrical and mechanical properties to the PCB and are relatively cheaper than other PCB’s which is the major reason for the major usage of FR-2 laminates in construction of PCB material. They are widely used for manufacturing low end consumer electronic equipments on the PCB board.
FR-2 laminates are used extensively used in PCB’s to provide superior heat resistance and smooth surface finish to the board. They are highly durable as compared to other laminates. When compared to FR-4 (the most commonly used PCB laminate), FR-2 has a slightly lower Tg of 105 Degrees and is not as efficient.
Also, it is very similar to FR-1, except for a lower glass transition temperature Tg of 105 degress, compared to 130 degress for FR-1. Many PCB manufacturers only provide one: FR-1 or FR-2 laminates as options for PCB boards and not both, as they are very similar.
Key Paramters of FR-2
| Paramter |
Value |
| Dielectric Constant |
4-5 |
| Dielectric Dissipation Factor |
0.025 - 0.035 |
| Glass Transition Temperature |
105 Degrees C |
| Resistance of Copper Foil |
3.5 Ohms/cm |
| Volume Resistivity |
5 x 1011 Ohms/CM3 |
| Insulating Resistance |
1-5 x 107 |
PCB Directory has listed the leading FR-2 PCB fabricators and manufacturers and made them searchable through their location and capabilities. You can select the country or state to narrow down on local FR-2 PCB manufacturers or companies that can develop your printed circuit boards who are close to where you are located. In addition to this, you can also select the capabilities that you are looking for in a FR-2 PCB supplier, like - Number of Layers, Type of Board, board thickness etc. - We narrow down the list to show you the companies who can cater to your requirement.
