• VT-4A Aluminum Base Laminate/Prepreg

    UL Approval: E214381 Version: B6 03/05/2018

    General Information

    • VT-4A1 / VT-4A1 PP: Thermal Conductivity - 1.6W/mK, MOT 90℃
    • VT-4A2 / VT-4A2 PP: Thermal Conductivity - 2.2W/mK, MOT 90℃
    • VT-4A2H / VT-4A2H PP: Thermal Conductivity - 2.2W/mK, MOT 105℃
    • Excellent Electrical and Mechanical Characteristics
    • Flammability UL94 V0
    • Halogen Free

    Application

    • Ultra bright LED Substrate
    • Power Conversion
    • PDP, LED, Regulator for TV
    • Monitor Drives
    • Rectifier, Power Supply

    Storage Condition & Shelf Life

    Prepreg Laminate
    Storage Condition Temperature < 23℃ (73℉) < 5℃ (41℉) Room
    Relative Humidity < 55% / /
    Shelf Life 3 Months 6 Months 24 Months

    The RCC & RCF exceeding shelf life should be retested.

    Designation of IMS Laminate

    171002-VT-4A-New-Designation.jpg

    Laminate Properties

    Item Test Method (IPC-TM-650) Unit VT-4A1 VT-4A2 VT-4A2H
    75um 100um 125um 150um 75um 100um 125um 150um 75um 100um 125um 150um
    Thermal Conductivity ISO 22007-2 W/m*K 1.6 2.2 2.2
    Thermal Impedance ISO 22007-2 ℃*in2/W 0.074 0.099 0.123 0.148 0.054 0.072 0.089 0.107 0.054 0.072 0.089 0.107
    Tg DSC 2.4.25 130 130 130
    Td TGA ASTM D3850 380 380 380
    Thermal Stress Solder Dip @ 288℃ 2.4.13.1 Minute >=5 >=5 >=5
    Hi-Pot Withstand DC 2.5.7.2 V 4500 5000 6000 8000 4500 5000 6000 8000 4500 5000 6000 8000
    Breakdown Voltage AC 2.5.6.3 V 6000 7500 9000 10000 6000 7500 9000 10000 6000 7500 9000 10000
    Dk @ 1MHz C-24/23/50 2.5.5.3 - 5.0 5.1 5.1
    Df @ 1MHz C-24/23/50 2.5.5.3 - 0.015 0.014 0.014
    Volume Resistance After Moisture 2.5.17.1 MΩ-cm 4.5E+8 5.1E+8 5.1E+8
    E-24/125 2.3E+7 3.1E+7 3.1E+7
    Surface Resistance After Moisture 2.5.17.1 2.2E+7 2.3E+7 2.3E+7
    E-24/125 5.1E+6 5.2E+6 5.2E+6
    Peel Strength (1oz) As received 2.4.8 Lb/in 12 12 12
    CTI As received ASTM D3638 V 600 600 600
    Flammability As received UL94 Rating V0 V0 V0
    RTI Electric UL94 90 90 105
    Mechanical UL94 90 90 105

    All test data provided are typical values but not intended to be specification values.

    Availability

    Laminate

    Item Availability
    Dielectric .003" (75um), .004" (100um), .005" (125um), .006" (150um), .008" (200um)
    Standard Size Imperial 18.11*24.02, 20.08*24.02, 20.98*24.02, 18.11*48.03, 20.08*48.03, 20.98*48.03
    Metric 460*610, 510*610, 533*610, 460*1220, 510*1220, 533*1220
    Copper weight Hoz, 1oz, 2oz, 3oz, 4oz, 6oz, 10oz
    Aluminum thickness 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm, 3.0mm
    Aluminum Alloy 1100, 5052, or as required

    Prepreg

    Product Pressed Thickness (um) Glass Fabric Application
    VT-4A1 VT-4A2 75 106 Circuit Clearance Fill
    100 106 Circuit Clearance Fill
    125 106 Hole Fill
    VT-4A2H 125 106 Hole Fill
    150 106 Hole Fill

    Protective Film for Aluminum Plate

    Type Material Max Operation Temperature
    Standard PET 170℃
    High Temperature Polyimide 270℃

    Aluminum and Aluminum Alloy Information

    Major Chemical Composition

    Alloy Code Composition Alloy Code Composition
    1100 Al, Si, Fe, Cu, Zn, Mn 5052 AL, Mg, Fe, Si, Cr, Cu, Zn
    3003 Al, Mn, Si, Fe, Cu, Zn 6061 Al, Mg, SI, Fe, Cr, Cu, Zn, Ti, Mn

    Calorific & Electrical Performance

    Alloy Melting Point Range (℃) CTE (ppm/℃) Cp (J/g-℃) Thermal Conductivity (W/m-K) Resisitivity (Ω-cm)
    20~100℃ 20~300℃
    1100 643~657.2 23.6 25.5 0.904 220 3.00E-6
    3003 643~654 23.2 25.1 0.893 163 4.16E-6
    5052 607.2~649 23.8 25.7 0.880 138 4.99E-6
    6061 582~651.7 23.6 25.3 0.896 167 3.99E-6

    Mechanical Performance

    Alloy Hardness (HB) Ultimate Tensile Strength (MPa) Tensile Yield Strength (MPa) Elongation at Break 1.6mm (%) Elastic Modulus (GPa) Poisson Ratio Fatigue Strength (MPa) Shear Modulus (GPa) Shear Strength (MPa)
    1100H24 32 124 117 9 68.9 0.330 48.3 26.0 75.8
    3003H24 40 152 145 8 68.9 0.330 62.1 25.0 96.5
    5052H32 68 262 214 10 70.3 0.330 124 25.9 145
    6061T6 95 310 276 12 68.9 0.330 96.5 26.0 207

    *Number of cycles: 5.0E+8

    Download TDS Datasheet