• VT-770 / VT-770(LK) Laminate/Prepreg

    UL Approval: E214381 Version: A01 23/06/2023

    General Information

    • Halogen Free & High Tg (260˚C DMA)
    • Low Dk & Very Low Df
    • Excellent Thermal Reliability
    • High Modulus, Low CTE
    • Suitable for CSP, FCP, SiP, AiP, BGA & PGA, etc.

    Application

    • Handheld Equipment
    • High Frequency & High Speed Applications
    • Satellite Communications
    • Navigation, GPS, LTE

    Availability

    • Core Thickness: 0.0012” (0.03mm) to 0.031” (0.8mm), available in sheet or panel form
    • Copper Foil: 1/7oz (5μm) to 2oz (70μm)
    • Prepregs are available in roll or panel form
    • Thickness 0.02mm to 0.1mm

     

    Properties Prepreg Laminate
    Storage Condition Temperature Below 23°C (73°F) Below 5°C (41°F) Room
    Relative humidity Below 55% RH / /
    Shelf Life 3 months 6 months 24 months (airproof)

    The prepreg exceeding shelf life should be retested.

    Properties Sheet

    Properties Test Method Units Specification VT-770 VT-770(LK)
    Thermal Properties
    Tg TMA IPC-TM-650 2.4.24.4 °C 170 minimum 230 230
    DMA IPC-TM-650 2.4.24 °C 170 minimum 260 260
    Td ASTM D3850 °C 340 minimum 450 450
    T260 IPC-TM-650 2.4.24.1 Minute 30 minimum >60 >60
    T288 IPC-TM-650 2.4.24.1 Minute 15 minimum >60 >60
    Thermal Stress @ 288°C IPC-TM-650 2.4.13.1 Second Pass 10s >600 >600
    Z-axis CTE Before Tg IPC-TM-650 2.4.24 ppm/°C 60 maximum 25 22
    XY-axis CTE IPC-TM-650 2.4.24.5 ppm/°C - 9~10 9~10
    Electrical Properties
    DK (RC 50%) @ 1GHz IPC-TM-650 2.5.5.9 - - 3.5~3.6 3.4~3.5
    @ 10GHz IPC-TM-650 2.5.5.13 - - 3.4~3.5 3.3~3.4
    DF (RC 50%) @ 1GHz IPC-TM-650 2.5.5.9 - - 0.0030 0.0020
    @ 10GHz IPC-TM-650 2.5.5.13 - - 0.0040 0.0024
    Volume Resistivity After Moisture Resistance IPC-TM-650 2.5.17.1 MΩ-cm 1.0E+4 minimum 5.0E+8 5.0E+8
    E-24/125 IPC-TM-650 2.5.17.1 MΩ-cm 1.0E+3 minimum 5.0E+6 5.0E+6
    Surface Resistivity After Moisture Resistance IPC-TM-650 2.5.17.1 MΩ 1.0E+4 minimum 5.0E+7 5.0E+7
    E-24/125 IPC-TM-650 2.5.17.1 MΩ 1.0E+3 minimum 5.0E+6 5.0E+6
    Electrical Strength IPC-TM-650 2.5.6.2 Volt/mil (KV/mm) 762 (30) minimum 1400 (55) 1400 (55)
    Dielectric Breakdown IPC-TM-650 2.5.6 KV 40 minimum 60 60
    Comparative Tracking Index (CTI) ASTM D3638 Rating (Volt) - Grade 3 (175~250) Grade 3 (175~250)
    Arc Resistance ASTM D495 Second 60 minimum 195 195
    Mechanical Properties
    Peel Strength (12μm) As received IPC-TM-650 2.4.8 lb/in (N/mm) - 4.0 (0.7) 4.0 (0.7)
    After thermal stress IPC-TM-650 2.4.8 lb/in (N/mm) 3.0 (0.52) 4.0 (0.7) 4.0 (0.7)
    Flexural Modulus Warp/Fill IPC-TM-650 2.4.24.4 GPa - 24~28 24~28
    Physical Properties
    Moisture Absorption IPC-TM-650 2.6.2.1 % 0.80 maximum 0.10 0.10
    Flammability UL-94 Rating V-1 minimum V-0 V-0

    All test data provided are typical values and not intended to be specification values. Disclaimer: The information and data contained in this technical literature is based on data and knowledge correct at the time of publishing/printing and is believed to be accurate and is offered in good faith for the benefit of the user. The user should make his own tests to verify the suitability of this product for any application before its use. All data are typical values only and subject to change without notice.

    Published on: 23/06/2023

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