• tec-speed 8.1 & 8.2 H-PK VT-772+(LK) & VT-772+(LK2) Laminate/Prepreg

    UL Approval: E214381 Version: PRELIM 13/01/2025

    General Information

    • Halogen Free & High Tg & Low CTE
    • Very Low Dk & Extremely Low Loss 
    • Excellent Thermal Reliability

    Application

    • High Speed Network Equipment
    • AI GPU
    • 1.6 & 3.2T Optical Transceivers

    Availability

    • Core Thickness: 0.002” (0.05mm) to 0.007(0.178mm), available in sheet or panel form
    • Copper Foil: Toz to 2oz
    • Prepregs are available in roll or panel form
    • LK2-Glass Styles: 1035, 1078
    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 IPC-4101E /314

    Properties Test Method Units Specification VT-772+(LK) VT-772+(LK2)
    Thermal Properties
    Tg DMA IPC-TM-650 2.4.24.4 °C 170 minimum 260 260
    TMA IPC-TM-650 2.4.24.4 °C 170 minimum 230 230
    Td ASTM D3850 °C 340 minimum 445 445
    T288 IPC-TM-650 2.4.24.1 Minute 15 minimum >120 >120
    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 30 30
    After Tg IPC-TM-650 2.4.24 ppm/°C 300 maximum 140 140
    Total Expansion (50~260°C) IPC-TM-650 2.4.24 % 3.5 maximum 1.4 1.4
    Electrical Properties
    Dk @ 10GHz (RC 66%) Cavity Resonator - 5.2 maximum 3.10 2.90
    Df @ 10GHz (RC 66%) Cavity Resonator - - 0.0017 0.0013
    Volume Resistivity After Moisture Resistance IPC-TM-650 2.5.17.1 MΩ-cm 1.0E+4 minimum 5.00E+08 5.00E+08
    E-24/125 IPC-TM-650 2.5.17.1 MΩ-cm 1.0E+3 minimum 5.00E+06 5.00E+06
    Surface Resistivity After Moisture Resistance IPC-TM-650 2.5.17.1 MΩ 1.0E+4 minimum 5.00E+07 5.00E+07
    E-24/125 IPC-TM-650 2.5.17.1 MΩ 1.0E+3 minimum 5.00E+6 5.00E+06
    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 IPC-TM-650 2.5.1 Second 60 minimum 195 195
    Mechanical Properties
    Peel Strength (Hoz HVLP3) As received IPC-TM-650 2.4.8 lb/in (N/mm) - 4.5 (0.8) 4.5 (0.8)
    After thermal stress IPC-TM-650 2.4.8 lb/in (N/mm) - 4.5 (0.8) 4.5 (0.8)
    Flexural Modulus IPC-TM-650 2.4.4 GPa - 24~28 24~28
    Physical Properties
    Moisture Absorption IPC-TM-650 2.6.2.1 % 0.80 maximum 0.1 0.1
    Flammability UL-94 Rating V-0 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: 13/01/2025

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