company tower banner
Isola Company Logo

Isola 370HR

Isola 370HR laminates and prepregs, deigned by Polyclad, are made using a patented high performance 180°C Tg FR-4 multifunctional epoxy resin system that is designed for multilayer Printed Wiring Board (PWB) applications where maximum thermal performance and reliability are required. We manufacture 370HR laminates and prepregs with high quality E-glass glass fabric for superior Conductive Anodic Filament (CAF) resistance. 370HR provides superior thermal performance with low Coefficient of Thermal Expansion (CTE) and the mechanical, chemical and moisture resistance properties that equal or exceed the performance of traditional FR-4 materials. 370HR is used in thousands of PWB designs and has proven to be best in class for thermal reliability, CAF performance, ease of processing and proven performance on sequential lamination designs.

Functions: Laminate, Prepreg

Reinforcement Material: Glass Fibers

End Uses: Medical Devices, PCB Materials, Printed Wiring Boards

Technical Data Sheet
  • TypeDocument Name
View All Documents

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
  • Polyclad®Grade PCL-FR-370HR
  • Qualified to UL’s MCIL Program
  • RoHS Compliant

Performance Attributes

  • CAF resistant

Processing Advantages

  • FR-4 process compatible
  • UV blocking and AOI fluorescence
  • Multiple reflow capable
  • HDI technology compatible

Product Attributes

  • High Density Interconnect
  • High Thermal Reliability

Applications & Uses

Typical Market Applications
  • Networking and Communications
  • Aerospace and Defense
  • Computing, Storage and Peripherels
  • Medical, Industrial and Instrumentation
  • Consumer Electronics
  • Automative and Transportation

Properties

Flame Rating
Typical Properties
ValueUnitsTest Method / Conditions
Arc Resistance115.0SecondsIPC-TM-650
Comparative Tracking Index (CTI)3 (175-249)VoltsUL 746A ASTM D3638
Decomposition Temperature (Td) by TGA (5% weight loss)340.0°CIPC-TM-650
Dielectric Breakdownmin. 50kVIPC-TM-650
Dk, Loss Tangent(1 GHz)0.0161IPC-TM-650
Dk, Loss Tangent(10 GHz)0.025IPC-TM-650
Dk, Loss Tangent(100 MHz)0.015IPC-TM-650
Dk, Loss Tangent(2 GHz)0.021IPC-TM-650
Dk, Loss Tangent(5 GHz)0.025IPC-TM-650
Dk, Permittivity(1 GHz)4.17IPC-TM-650
Dk, Permittivity(10 GHz)3.92IPC-TM-650
Dk, Permittivity(100 MHz)4.24IPC-TM-650
Dk, Permittivity(2 GHz)4.04IPC-TM-650
Dk, Permittivity(5 GHz)3.92IPC-TM-650
Electric Strength (Laminate & laminated prepreg)54 (1350)kV/mm (V/mil)IPC-TM-650
Flammability (Laminate & laminated prepreg)V-0RatingUL 94
Flexural Strength Cross direction77.0ksiIPC-TM-650
Flexural Strength Length direction90.0ksiIPC-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)]1.25 (7.0)N/mm (lb/inch)IPC-TM-650
Peel Strength After process solutions (Standard profile copper)1.14 (6.5)N/mm (lb/inch)IPC-TM-650
Peel Strength After thermal stress (Standard profile copper)1.25 (7.0)N/mm (lb/inch)IPC-TM-650
Poisson's Ratio Cross direction0.171ASTM D3039
Poisson's Ratio Length direction0.177ASTM D3039
Relative Thermal Index (RTI)130.0°CUL 796
Surface Resistivity (After moisture resistance)3.0 x 10^6IPC-TM-650
Surface Resistivity (At elevated temperature)2.0 x 10^8IPC-TM-650
Tensile Strength Cross direction35.6ksiASTM D3039
Tensile Strength Length direction55.9ksiASTM 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)30.0MinutesIPC-TM-650
Volume Resistivity (After moisture resistance)3.0 x 10^8MΩ-cmIPC-TM-650
Volume Resistivity (At elevated temperature)7.0 x 10^8MΩ-cmIPC-TM-650
X/Y-Axis CTE Pre-Tg13/14ppm/°CIPC-TM-650
Young's Modulus Cross direction3178.0ksiASTM D790-15e2
Young's Modulus Length direction3744.0ksiASTM D790-15e2
Z-Axis CTE 50 to 260°C, (Total Expansion)2.8%IPC-TM-650
Z-Axis CTE Post-Tg230.0ppm/°CIPC-TM-650
Z-Axis CTE Pre-Tg45.0ppm/°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
  • Mechanically spread glass