• pro-bond 4C: Low Dk/Low Df Resin Coated Copper Bondply

    UL Approval: E214381 23/03/2024

    Resin Coated Copper (RCC) Bondply is an unreinforced adhesive system coated onto ultra-thin copper foil (1.5-5.0μm supported on an 18μm carrier foil) for use in high performance and high reliability multilayer PCB stack-ups.

    VT-464LT is a high Tg, ceramic-filled, low Dk (3.05) & low Df (0.0065), halogen-free thermoset resin system, specifically designed for use in multilayer PCBs with Ventec tec-speed laminates & prepregs, and it is also fully compatible with other resin systems in hybrid stack-ups.

    General Information:

    • Halogen free, Dk 3.05 & Df 0.0065
    • Ultra-thin dielectric layer
    • Suitable for sequential laminations
    • Unreinforced adhesive for better electrical isotropic consistency
    • Excellent flow characteristics and filling ability, designed for fine line and space
    • Laser drillable
    • Excellent laser hole pattern consistency


    • Interposers
    • Probe Cards
    • Anti-shake Coils
    • Packaging Modules

    Storage Condition

    Storage Condition Temperature Below 23˚C (73˚F) Below 5˚C (41˚F)
    Relative Humidity Below 55% RH /


    Properties Test Method Units Typical Value
    Dk (RC 50%) @ 1GHz IPC-TM-650 - 3.50
    @ 10GHz 3.05
    Df @ 1GHz IPC-TM-650 - 0.0050
    @ 10GHz 0.0065
    Tg DMA IPC-TM-650 °C 295
    Td TGA ASTM D3850 °C 380
    CTE α1 (<Tg) IPC-TM-650 2.4.24 ppm/°C 15.5
    α2 (>Tg) 45
    Thermal Stress @ 288˚C (10s/Cycle) IPC-TM-650 Second >300
    Thermal Conductivity ASTM D5470 W/mK 0.5
    Peel Strength - 5μm (Plated to 20μm) IPC-TM-650 2.4.8 N/mm (lb/in) 0.65 (3.7)
    Tensile Modulus 40˚C IPC-TM-650 GPa 9.2
    Moisture Absorption IPC-TM-650 % 0.08
    Flammability (in Lab) UL-94 Rating V-0

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


    Press Ply Thickness 25μ/50μ (0.0010”/0.0020”)
    Copper Foil Thickness (18μm Carrier Foil) 1.5μm/2.0μm/3.0μm/5.0μm
    Panel Size 610mmx457mm (24”x18”)

    Download TDS Datasheet