Electronics Corp.
FR-4 Glass Epoxy Technical Product Information
FR-4 Glass Epoxy , designated FR-4 by NEMA, is a woven glass cloth construction laminate with an epoxy resin binder. ( an 8 ply construction in .059'' thickness.) This material conforms to the requirements of military specification 13949, revision F, type GF, and is rated 94V-O by Underwriters Laboratories. This material is generally used in communications, computer, computer peripherals, instruments, industrial controls, and automotive electronics. It offers advantages in the following areas: Electrical Properties—Excellent for high technology communications and computer systems.
Mechanical Properties—Greater than paper base and composite materials.
Moisture Absorption—Lower than paper base and composite laminates.
Glass Transition Temperature—Higher than most FR-4 laminates.
Solder Float—Passes 160 seconds at 575°F.
Typical Values
| Property | Units | Value |
| Thickness | Inches | .059 |
| Retained Resin | % | 44 |
Thermal Properties
| Property | Units | Value | Condition |
| Tg, min. ( DSC ) | °C | 135 | |
| CTE x-axis | ppm/°C | 14 | Ambient to Tg |
| CTE y-axis | ppm/°C | 13 | Ambient to Tg |
| CTE z-axis | ppm/°C | 175 | Ambient to 288 °C |
| Solder Float, 288 °C | seconds | >120 | Condition A |
Electrical Properties
| Property | Units | Value | Condition |
| Permittivity ( DK ) max. | 4.7 | C-24/23/50 | |
| @ 500 Mhz | 4.35 | ||
| @1 GHz ( HP4291 ) | 4.34 | ||
| Loss Tangent ( DF ), max. @ | |||
| 1 MHz ( 2 Fluid Cell ) | 0.020 | ||
| 500 Mhz | 0.017 | ||
| 1 GHz ( 2 Fluid Cell ) | 0.016 | ||
| Surface Resistivity, min. | megohms | 2 X 10^5 | Condition F |
| 1 X 10^8 | E-24/125 | ||
| Volume Resistivity, min. | min. | 8 X 10^7 | Condition F |
| megohm- cm | 2 X 10^7 | E-24/125 | |
| Dielectric Breakdown, min | kV | 55 | D-48/50 |
| Arc Resistance, min. | seconds | 100 |
Physical Properties
| Property | Units | Value | Condition |
| Peel Strength, 1 oz. | lb./in. | 9.0 | Condition A |
| 9.0 | After Thermal Stress | ||
| 9.0 | E-1/125 | ||
| Flexural Strength - LW | psi | 80000 | Condition A |
| Flexural Strength - CW | psi | 60000 | Condition A |
| Warp & Twist | % | 0.5 | Condition |
| Flammability | V-0 | UL94 | |
| Moisture Absorption | % | < 0.25 | D-24/23 |
| Tensil Strength - LW | psi | 50000 | Condition A |
| Tensil Strength - CW | psi | 40000 | Condition A |
| Tensil Modulus ( Young's ) - LW | psi | 3.5 X 10^6 | Condition A |
| Tensil Modulus ( Young's ) - CW | psi | 3.0 X 10^6 | Condition A |
| Flexural Modulus ( Taylor's ) - LW | psi | 2.7 X 10^6 | Condition A |
| Flexural Modulus ( Taylor's ) - CW | psi | 2.4 X 10^6 | Condition A |
| Poisson's Ratio - LW | 0.136 | Condition A | |
| Poisson's Ratio - CW | 0.118 | Condition A |
631-563-3388
631-563-3389
110 Keyland Court, Bohemia, NY 11716
800-878-7227
General Information: injectorall@mindspring.com
Copyright © 2003 Injectorall Electronics Corp.
visitors to this page since Last Modified: November 19, 2002