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isola fr408 data sheet

isola fr408 is mid loss, epoxy laminate and prepreg, isola fr408 is a high-performance FR-4 epoxy laminate and prepreg system designed for advanced circuitry applications.


This is another product besides isola 370hr. isola fr408 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. isola fr408 is compatible with most FR-4 processes. This feature allows the use of isola fr408 without adding complexity to current fabrication techniques.

PropertyTypical   ValueUnitsTest Method
Metric (English)IPC-TM-650 (or as noted)
Glass Transition Temperature (Tg) by DSC180°C2.4.25C
Decomposition Temperature (Td) by TGA @ 5% weight loss360°C2.4.24.6
Time to Delaminate by TMA   (Copper removed)A. T26060Minutes2.4.24.1
B. T28815
Z-Axis CTEA. Pre-Tg60ppm/°C2.4.24C
B. Post-Tg228ppm/°C
C. 50 to 260°C, (Total   Expansion)3.5%
X/Y-Axis CTEPre-Tg13ppm/°C2.4.24C
Thermal Conductivity0.4W/m·KASTM E1952
Thermal Stress 10 sec @ 288ºC   (550.4ºF)A. UnetchedPassPass Visual2.4.13.1
B. Etched
Dk, PermittivityA. @ 100 MHz3.692.5.5.3
B. @ 1 GHz3.662.5.5.9
C. @ 2 GHz3.67Bereskin Stripline
D. @ 5 GHz3.66Bereskin Stripline
E. @ 10 GHz3.65Bereskin Stripline
Df, Loss TangentA. @ 100 MHz0.00942.5.5.3
B. @ 1 GHz0.01172.5.5.9
C. @ 2 GHz0.012Bereskin Stripline
D. @ 5 GHz0.0127Bereskin Stripline
E. @ 10 GHz0.0125Bereskin Stripline
Volume ResistivityA. After moisture resistance4.6 x 107MΩ-cm2.5.17.1
B. At elevated temperature2.8 x 108
Surface ResistivityA. After moisture resistance2.81 x 1062.5.17.1
B. At elevated temperature2.64 x 108
Dielectric Breakdown>50kV2.5.6B
Arc Resistance120Seconds2.5.1B
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 StrengthA. Low profile copper foil and very low profile copper foil all   copper foil >17 μm [0.669 mil]
N/mm (lb/inch)2.4.8C
B. Standard profile copper1.14 (6.5)
    1.   After thermal stress
2.4.8.2A
    2. At   125ºC (257ºF)1.225 (7.0)2.4.8.3
    3.   After process solutions1.14 (6.5)2.4.8.3

0.90 (5.1)
Flexural StrengthA. Length direction81.4ksi2.4.4B
B. Cross direction64.1
Tensile StrengthA. Length direction59.3ksiASTM D3039
B. Cross direction42
Young's ModulusA. Length direction3685ksiASTM D790-15e2
B. Cross direction3044
Poisson's RatioA. Length direction0.162ASTM D3039
B. Cross direction0.138
Moisture Absorption0.15%2.6.2.1A
Flammability (Laminate & laminated prepreg)V-0RatingUL 94
Relative Thermal Index (RTI)130°CUL 796
Core   Data








ConstructionResin Content %Thickness (inch)Thickness (mm)Dielectric   Constant (DK)/ Dissipation Factor (DF)
100 MHz500 MHz1 GHz2 GHz5 GHz10 Ghz
1x10673.00%0.0020.0513.363.323.313.293.273.26
0.01030.01160.01330.01390.01470.0145
1x108059.00%0.00270.0693.633.613.63.583.573.56
0.00960.01060.0120.01240.01310.0129
1x108064.00%0.0030.0763.523.53.493.473.463.45
0.010.0110.01240.01290.01370.0135
2x10667.00%0.00350.0893.463.443.433.413.393.38
0.010.01120.01270.01330.0140.0138
1x331349.00%0.00350.0893.863.843.833.823.83.8
0.0090.00990.0110.01140.0120.0118
1x331354.00%0.0040.1023.743.723.713.73.683.67
0.00930.01030.01150.01190.01250.0124
2x10670.00%0.0040.1023.43.383.373.353.333.32
0.01010.01140.0130.01360.01440.0142
1x307048.00%0.0040.1023.883.873.863.843.833.82
0.0090.00980.01090.01130.01190.0117
106/108061.00%0.00430.1093.583.563.553.543.523.51
0.00970.01080.01220.01260.01330.0132
1x211652.00%0.00480.1223.763.743.733.723.713.7
0.00920.01020.01130.01170.01230.0123
2x108057.00%0.0050.1273.673.653.643.633.613.6
0.00950.01050.01180.01220.01290.0127
1x211653.00%0.0050.1273.763.743.733.723.713.7
0.00920.01020.01140.01180.01240.0123
106/211356.00%0.00530.1353.693.673.663.653.633.63
0.00940.01040.01170.01210.01280.0126
1x165246.00%0.00550.143.943.923.913.93.883.88
0.00890.00970.01080.01110.01160.0125
106/211358.00%0.00550.143.653.633.623.63.593.58
0.00950.01050.01190.01230.0130.0128
1080/211354.00%0.0060.1523.743.723.713.73.683.67
0.00930.01030.01150.01190.01250.0124
1x165250.00%0.0060.1523.843.823.813.793.783.77
0.00910.010.01110.01150.01210.0119
2x108063.00%0.0060.1523.543.523.513.493.483.47
0.00980.01090.01230.01280.01360.0134
2x331354.00%0.0080.2033.743.723.713.73.683.67
0.00930.01030.01150.01190.01250.0124
2x211653.00%0.010.2543.753.733.723.713.693.68
0.00920.01020.01140.01180.01240.0123
1x1080/2x211652.00%0.0120.3053.763.743.733.723.713.7
0.00920.01020.01130.01170.01230.0123
3x211652.00%0.0140.3563.763.743.733.723.713.7
0.00920.01020.01130.01170.01230.0123
2x7628/108042.00%0.0160.4064.044.024.0143.993.99
0.00870.00940.01040.01070.01120.011
2x7628/211641.00%0.0180.4574.074.054.044.034.024.01
0.00860.00940.01030.01060.01110.0109










Prepreg   Data








Glass StyleResin   Content %Thickness   (inch)Thickness   (mm)Dielectric Constant (DK)/ Dissipation Factor (DF)
100 MHz500 MHz1 GHz2 GHz5 GHz10 GHz
10675.00%0.00230.0583.313.283.273.253.233.23
0.01040.01170.01350.01410.0150.0147
108065.00%0.00310.0793.53.483.473.453.433.43
0.00990.0110.01270.01310.01380.0136
108068.00%0.00340.0863.443.423.413.393.373.36
0.010.01120.01280.01340.01410.0139
331353.00%0.00370.0943.763.743.733.723.713.7
0.00920.01020.01140.01180.01240.0123
108071.00%0.00380.0973.383.353.353.333.313.3
0.01020.01150.01310.01370.01450.0143
211357.00%0.0040.1023.673.653.643.633.613.6
0.00950.01050.01180.01220.01290.0127
331359.00%0.00410.1043.743.723.713.73.683.67
0.00960.01060.0120.01240.01310.0129
211656.00%0.00510.133.693.673.663.653.633.63
0.00940.01040.01170.01210.01280.0126
165250.00%0.00580.1473.843.823.813.793.783.77
0.00910.010.01110.01150.01210.0119
762844.00%0.00710.183.993.973.963.953.943.93
0.00880.00960.01060.0110.0110.011