FR408
Mid Loss, Epoxy Laminate and Prepreg
FR408 is a high-performance FR-4 epoxy laminate and prepreg system designed for advanced circuitry applications.
Thermal Performance
Td: 360°C
Electrical Performance
Df: 0.0120
Its low dielectric constant (Dk) and low dissipation factor (Df) make it an
ideal candidate for broadband circuit designs requiring faster signal
speeds or improved signal integrity. FR408 is compatible with most
FR-4 processes. This feature allows the use of FR408 without
adding complexity to current fabrication techniques.
Product Features
- Industry Recognition
- UL File Number: E41625
- Qualified to UL’s MCIL Program
- RoHS Compliant
- Performance Attributes
- Processing Advantages
- FR-4 process compatible
- UV blocking and AOI fluorescence
Production & Manufacturing
Currently manufactured in Asia, North America, Europe
Product Availability
- Standard Material Offering: Laminate
- 2 to 125 mil (0.05 to 3.2 mm)
- Copper Foil Type
- HTE Grade 3
- RTF (Reverse Treat Foil)
- Copper Weight
- ½, 1 and 2 oz (18, 35 and 70 µm) available
- Heavier copper foil available
- Thinner copper foil available
- Standard Material Offering: Prepreg
- Tooling of prepreg panels
- Glass Fabric Availability
- E-glass
- Square weave glass
- Mechanically spread glass
Property | Typical Value | Units | Test Method | |
---|---|---|---|---|
Metric (English) | IPC-TM-650 (or as noted) | |||
Glass Transition Temperature (Tg) by DSC | 180 | °C | 2.4.25C | |
Decomposition Temperature (Td) by TGA @ 5% weight loss | 360 | °C | 2.4.24.6 | |
Time to Delaminate by TMA (Copper removed) |
A. T260 B. T288
|
60 15
|
Minutes | 2.4.24.1 |
Z-Axis CTE |
A. Pre-Tg B. Post-Tg C. 50 to 260°C, (Total Expansion)
|
60 228 3.5
|
ppm/°C ppm/°C %
|
2.4.24C |
X/Y-Axis CTE | Pre-Tg | 13 | ppm/°C | 2.4.24C |
Thermal Conductivity | 0.4 | W/m·K | ASTM E1952 | |
Thermal Stress 10 sec @ 288ºC (550.4ºF) |
A. Unetched B. Etched
|
Pass | Pass Visual | 2.4.13.1 |
Dk, Permittivity |
A. @ 100 MHz B. @ 1 GHz C. @ 2 GHz D. @ 5 GHz E. @ 10 GHz
|
3.69 3.66 3.67 3.66 3.65
|
— |
2.5.5.3 2.5.5.9 Bereskin Stripline Bereskin Stripline Bereskin Stripline
|
Df, Loss Tangent |
A. @ 100 MHz B. @ 1 GHz C. @ 2 GHz D. @ 5 GHz E. @ 10 GHz
|
0.0094 0.0117 0.0120 0.0127 0.0125
|
— |
2.5.5.3 2.5.5.9 Bereskin Stripline Bereskin Stripline Bereskin Stripline
|
Volume Resistivity |
A. After moisture resistance B. At elevated temperature
|
4.6 x 107 2.8 x 108
|
MΩ-cm | 2.5.17.1 |
Surface Resistivity |
A. After moisture resistance B. At elevated temperature
|
2.81 x 106 2.64 x 108
|
MΩ | 2.5.17.1 |
Dielectric Breakdown | >50 | kV | 2.5.6B | |
Arc Resistance | 120 | Seconds | 2.5.1B | |
Electric Strength (Laminate & laminated prepreg) | 55 (1400) | kV/mm (V/mil) | 2.5.6.2A | |
Comparative Tracking Index (CTI) | 3 (175-249) | Class (Volts) |
UL 746A ASTM D3638 |
|
Peel Strength |
A. Low profile copper foil and very low profile copper foil all copper foil >17 μm [0.669 mil] B. Standard profile copper 1. After thermal stress 2. At 125ºC (257ºF) 3. After process solutions
|
1.14 (6.5) 1.225 (7.0) 1.14 (6.5) 0.90 (5.1)
|
N/mm (lb/inch) |
2.4.8C 2.4.8.2A 2.4.8.3 2.4.8.3
|
Flexural Strength |
A. Length direction B. Cross direction
|
561 (81.4) 442 (64.1)
|
MPa (kpsi) | 2.4.4B |
Tensile Strength |
A. Length direction B. Cross direction
|
409 (59.3) 290 (42.0)
|
MPa (kpsi) | ASTM D3039 |
Young's Modulus |
A. Length direction B. Cross direction
|
3685 3044
|
ksi | ASTM D790-15e2 |
Poisson's Ratio |
A. Length direction B. Cross direction
|
0.162 0.138
|
— | ASTM D3039 |
Moisture Absorption | 0.15 | % | 2.6.2.1A | |
Flammability (Laminate & laminated prepreg) | V-0 | Rating | UL 94 | |
Relative Thermal Index (RTI) | 130 | °C | UL 796 | |
The data, while believed to be accurate and based on analytical methods considered to be reliable, is for information purposes only. Any sales of these products will be governed by the terms and conditions of the agreement under which they are sold. |
NOTE
Visit our site http://www.isola-group.com for more details.
Revisions:
A: Initial release - 4/17
B: Corrected units for Flexural and Tensile Strength - 8/18
C: Change MOT to RTI 5/19
Core Data
Construction | Resin Content % | Thickness (inch) | Thickness (mm) | Dielectric Constant (DK)/ Dissipation Factor (DF) | |||||
---|---|---|---|---|---|---|---|---|---|
100 MHz | 500 MHz | 1 GHz | 2 GHz | 5 GHz | 10 Ghz | ||||
1x106 | 73.0% | 0.002 | 0.051 | 3.36 0.0103 |
3.32 0.0116 |
3.31 0.0133 |
3.29 0.0139 |
3.27 0.0147 |
3.26 0.0145 |
1x1080 | 59.0% | 0.0027 | 0.069 | 3.63 0.0096 |
3.61 0.0106 |
3.60 0.0120 |
3.58 0.0124 |
3.57 0.0131 |
3.56 0.0129 |
1x1080 | 64.0% | 0.003 | 0.076 | 3.52 0.0100 |
3.50 0.0110 |
3.49 0.0124 |
3.47 0.0129 |
3.46 0.0137 |
3.45 0.0135 |
2x106 | 67.0% | 0.0035 | 0.089 | 3.46 0.0100 |
3.44 0.0112 |
3.43 0.0127 |
3.41 0.0133 |
3.39 0.0140 |
3.38 0.0138 |
1x3313 | 49.0% | 0.0035 | 0.089 | 3.86 0.0090 |
3.84 0.0099 |
3.83 0.0110 |
3.82 0.0114 |
3.80 0.0120 |
3.80 0.0118 |
1x3313 | 54.0% | 0.004 | 0.102 | 3.74 0.0093 |
3.72 0.0103 |
3.71 0.0115 |
3.70 0.0119 |
3.68 0.0125 |
3.67 0.0124 |
2x106 | 70.0% | 0.004 | 0.102 | 3.40 0.0101 |
3.38 0.0114 |
3.37 0.0130 |
3.35 0.0136 |
3.33 0.0144 |
3.32 0.0142 |
1x3070 | 48.0% | 0.004 | 0.102 | 3.88 0.0090 |
3.87 0.0098 |
3.86 0.0109 |
3.84 0.0113 |
3.83 0.0119 |
3.82 0.0117 |
106/1080 | 61.0% | 0.0043 | 0.109 | 3.58 0.0097 |
3.56 0.0108 |
3.55 0.0122 |
3.54 0.0126 |
3.52 0.0133 |
3.51 0.0132 |
1x2116 | 52.0% | 0.0048 | 0.122 | 3.76 0.0092 |
3.74 0.0102 |
3.73 0.0113 |
3.72 0.0117 |
3.71 0.0123 |
3.70 0.0123 |
2x1080 | 57.0% | 0.005 | 0.127 | 3.67 0.0095 |
3.65 0.0105 |
3.64 0.0118 |
3.63 0.0122 |
3.61 0.0129 |
3.60 0.0127 |
1x2116 | 53.0% | 0.005 | 0.127 | 3.76 0.0092 |
3.74 0.0102 |
3.73 0.0114 |
3.72 0.0118 |
3.71 0.0124 |
3.70 0.0123 |
106/2113 | 56.0% | 0.0053 | 0.135 | 3.69 0.0094 |
3.67 0.0104 |
3.66 0.0117 |
3.65 0.0121 |
3.63 0.0128 |
3.63 0.0126 |
1x1652 | 46.0% | 0.0055 | 0.14 | 3.94 0.0089 |
3.92 0.0097 |
3.91 0.0108 |
3.90 0.0111 |
3.88 0.0116 |
3.88 0.0125 |
106/2113 | 58.0% | 0.0055 | 0.14 | 3.65 0.0095 |
3.63 0.0105 |
3.62 0.0119 |
3.60 0.0123 |
3.59 0.0130 |
3.58 0.0128 |
1080/2113 | 54.0% | 0.006 | 0.152 | 3.74 0.0093 |
3.72 0.0103 |
3.71 0.0115 |
3.70 0.0119 |
3.68 0.0125 |
3.67 0.0124 |
1x1652 | 50.0% | 0.006 | 0.152 | 3.84 0.0091 |
3.82 0.0100 |
3.81 0.0111 |
3.79 0.0115 |
3.78 0.0121 |
3.77 0.0119 |
2x1080 | 63.0% | 0.006 | 0.152 | 3.54 0.0098 |
3.52 0.0109 |
3.51 0.0123 |
3.49 0.0128 |
3.48 0.0136 |
3.47 0.0134 |
2x3313 | 54.0% | 0.008 | 0.203 | 3.74 0.0093 |
3.72 0.0103 |
3.71 0.0115 |
3.70 0.0119 |
3.68 0.0125 |
3.67 0.0124 |
2x2116 | 53.0% | 0.01 | 0.254 | 3.75 0.0092 |
3.73 0.0102 |
3.72 0.0114 |
3.71 0.0118 |
3.69 0.0124 |
3.68 0.0123 |
1x1080/2x2116 | 52.0% | 0.012 | 0.305 | 3.76 0.0092 |
3.74 0.0102 |
3.73 0.0113 |
3.72 0.0117 |
3.71 0.0123 |
3.70 0.0123 |
3x2116 | 52.0% | 0.014 | 0.356 | 3.76 0.0092 |
3.74 0.0102 |
3.73 0.0113 |
3.72 0.0117 |
3.71 0.0123 |
3.70 0.0123 |
2x7628/1080 | 42.0% | 0.016 | 0.406 | 4.04 0.0087 |
4.02 0.0094 |
4.01 0.0104 |
4.00 0.0107 |
3.99 0.0112 |
3.99 0.0110 |
2x7628/2116 | 41.0% | 0.018 | 0.457 | 4.07 0.0086 |
4.05 0.0094 |
4.04 0.0103 |
4.03 0.0106 |
4.02 0.0111 |
4.01 0.0109 |
Prepreg Data
Glass Style | Resin Content % | Thickness (inch) | Thickness (mm) | Dielectric Constant (DK)/ Dissipation Factor (DF) | |||||
---|---|---|---|---|---|---|---|---|---|
100 MHz | 500 MHz | 1 GHz | 2 GHz | 5 GHz | 10 GHz | ||||
106 | 75.0% | 0.0023 | 0.058 | 3.31 0.0104 |
3.28 0.0117 |
3.27 0.0135 |
3.25 0.0141 |
3.23 0.0150 |
3.23 0.0147 |
1080 | 65.0% | 0.0031 | 0.079 | 3.50 0.0099 |
3.48 0.0110 |
3.47 0.0127 |
3.45 0.0131 |
3.43 0.0138 |
3.43 0.0136 |
1080 | 68.0% | 0.0034 | 0.086 | 3.44 0.0100 |
3.42 0.0112 |
3.41 0.0128 |
3.39 0.0134 |
3.37 0.0141 |
3.36 0.0139 |
3313 | 53.0% | 0.0037 | 0.094 | 3.76 0.0092 |
3.74 0.0102 |
3.73 0.0114 |
3.72 0.0118 |
3.71 0.0124 |
3.70 0.0123 |
1080 | 71.0% | 0.0038 | 0.097 | 3.38 0.0102 |
3.35 0.0115 |
3.35 0.0131 |
3.33 0.0137 |
3.31 0.0145 |
3.30 0.0143 |
2113 | 57.0% | 0.0040 | 0.102 | 3.67 0.0095 |
3.65 0.0105 |
3.64 0.0118 |
3.63 0.0122 |
3.61 0.0129 |
3.60 0.0127 |
3313 | 59.0% | 0.0041 | 0.104 | 3.74 0.0096 |
3.72 0.0106 |
3.71 0.0120 |
3.70 0.0124 |
3.68 0.0131 |
3.67 0.0129 |
2116 | 56.0% | 0.0051 | 0.130 | 3.69 0.0094 |
3.67 0.0104 |
3.66 0.0117 |
3.65 0.0121 |
3.63 0.0128 |
3.63 0.0126 |
1652 | 50.0% | 0.0058 | 0.147 | 3.84 0.0091 |
3.82 0.0100 |
3.81 0.0111 |
3.79 0.0115 |
3.78 0.0121 |
3.77 0.0119 |
7628 | 44.0% | 0.0071 | 0.180 | 3.99 0.0088 |
3.97 0.0096 |
3.96 0.0106 |
3.95 0.0110 |
3.94 0.0110 |
3.93 0.0110 |
NOTE
Revisions:
A - Original Release - 4/17
B - Added Standard & Alternate construction-8/18
Resource Title & Summary | Date Updated |
---|---|
Isola Laminate Outgassing Data Properties | 12/17/2019 |
FR408 Processing Guide | 06/23/2020 |
FR408 Laminate Safety Data Sheet | 07/21/2020 |
FR408 Prepreg Safety Data Sheet | 07/21/2020 |
FR408 Laminate RoHS Declaration | 11/01/2022 |
FR408 Prepreg RoHS Declaration | 11/01/2022 |
Resources
New Low Dielectric Constant, High Tg, Printed Circuitry Substrates
This paper discusses new technologies presenting results of PCB fabrication techniques for these materials as well as the benefits to the end users.
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