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Isola FR408

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. FR408 is compatible with most FR-4 processes. This feature allows the use of FR408 without adding complexity to current fabrication techniques.

Functions: Laminate, Prepreg

Reinforcement Material: Glass Fibers

End Uses: Medical Devices

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Reinforcement Material
Composite Materials Functions

Features & Benefits

Ready-to-Use Product Features
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

Product Attributes

  • Legacy

Applications & Uses

Composites End Use
Typical Market Applications
  • Networking and Communications
  • Aerospace and Defense
  • Computing, Storage and Peripherels
  • Medical, Industrial and Instrumentation

Properties

Flame Rating
Typical Properties
ValueUnitsTest Method / Conditions
Arc Resistance120.0SecondsIPC-TM-650
Comparative Tracking Index (CTI)3 (175-249)VoltsUL 746A ASTM D3638
Decomposition Temperature (Td) by TGA (5% weight loss)360.0°CIPC-TM-650
Dielectric Breakdownmin. 50kVIPC-TM-650
Dk, Loss Tangent(1 GHz)0.0117IPC-TM-650
Dk, Loss Tangent(10 GHz)0.0125IPC-TM-650
Dk, Loss Tangent(100 MHz)0.0094IPC-TM-650
Dk, Loss Tangent(2 GHz)0.012IPC-TM-650
Dk, Loss Tangent(5 GHz)0.0127IPC-TM-650
Dk, Permittivity(1 GHz)3.66IPC-TM-650
Dk, Permittivity(10 GHz)3.65IPC-TM-650
Dk, Permittivity(100 MHz)3.69IPC-TM-650
Dk, Permittivity(2 GHz)3.67IPC-TM-650
Dk, Permittivity(5 GHz)3.66IPC-TM-650
Electric Strength (Laminate & laminated prepreg)55 (1400)kV/mm (V/mil)IPC-TM-650
Flammability (Laminate & laminated prepreg)V-0RatingUL 94
Flexural Strength Cross direction64.1ksiIPC-TM-650
Flexural Strength Length direction81.4ksiIPC-TM-650
Glass Transition Temperature (Tg) by DSC180.0°CIPC-TM-650
Moisture Absorption0.15%IPC-TM-650
Peel Strength (Low profile copper foil and very low profile copper foil all copper foil >17 μm [0.669 mil])1.14 (6.5)N/mm (lb/inch)IPC-TM-650
Peel Strength [125ºC (257ºF) (Standard profile copper)]1.14 (6.5)N/mm (lb/inch)IPC-TM-650
Peel Strength After process solutions (Standard profile copper)0.90 (5.1)N/mm (lb/inch)IPC-TM-650
Peel Strength After thermal stress (Standard profile copper)1.225 (7.0)N/mm (lb/inch)IPC-TM-650
Poisson's Ratio Cross direction0.138ASTM D3039
Poisson's Ratio Length direction0.162ASTM D3039
Relative Thermal Index (RTI)130.0°CUL 796
Surface Resistivity (After moisture resistance)2.81 x 10^6IPC-TM-650
Surface Resistivity (At elevated temperature)2.64 x 10^8IPC-TM-650
Tensile Strength Cross direction42.0ksiASTM D3039
Tensile Strength Length direction59.3ksiASTM D3039
Thermal Conductivity0.4W/m·KASTM E1952
Thermal Stress Etched [10 sec, 288ºC (550.4ºF)]PassIPC-TM-650
Thermal Stress Unetched [10 sec, 288ºC (550.4ºF)]PassIPC-TM-650
Time to Delaminate by T260 (Copper removed)60.0MinutesIPC-TM-650
Time to Delaminate by T288 (Copper removed)15.0MinutesIPC-TM-650
Volume Resistivity (After moisture resistance)4.6 x 10^7MΩ-cmIPC-TM-650
Volume Resistivity (At elevated temperature)2.8 x 10^8MΩ-cmIPC-TM-650
X/Y-Axis CTE Pre-Tg13.0ppm/°CIPC-TM-650
Young's Modulus Cross direction3044.0ksiASTM D790-15e2
Young's Modulus Length direction3685.0ksiASTM D790-15e2
Z-Axis CTE 50 to 260°C, (Total Expansion)3.5%IPC-TM-650
Z-Axis CTE Post-Tg228.0ppm/°CIPC-TM-650
Z-Axis CTE Pre-Tg60.0ppm/°CIPC-TM-650

Regulatory & Compliance

Certifications & Compliance

Packaging & Availability

Product Availability

Standard Material Offering: Laminate

  • 2 to 125 mil (0.05 to 3.2 mm)
  • Available in full size sheet or panel form

Copper Foil Type

  • HTE Grade 3
  • RTF (Reverse Treat Foil)

Copper Weight

  • ½ to 2 oz (18 to 70 µm) available
  • Heavier copper available
  • Thinner copper foil available

Standard Material Offering: Prepreg

  • Roll or panel form
  • Tooling of prepreg panels

Glass Fabric Availability

  • E-glass
  • Square weave glass