Isola I-Terra MT40

I-Tera® MT40 laminate materials exhibit exceptional electrical properties which are very stable over a broad frequency and temperature range.

I-Tera MT40 is suitable for many of today’s high speed digital and RF/microwave printed circuit designs. I-Tera MT40 features a dielectric constant (Dk) that is stable between -55°C and +125°C up to W-band frequencies. In addition, I-Tera MT40 offers a lower dissipation factor (Df) of 0.0031 making it a cost effective alternative to PTFE and other commercial microwave and high-speed digital laminate materials.
I-Tera MT40 laminate materials are currently being offered in both laminate and prepreg form in typical thicknesses and standard panel sizes. This provides a complete materials solution package for high-speed digital multilayer, hybrid, RF/microwave, multilayer and double-sided printed circuit designs. I-Tera MT40 does not require any special through hole treatments commonly needed when processing PTFE-based laminate materials.


  • Product Features
    • High thermal performance
      • Tg:200C (DSC)
      • Td:360C (TGA@5% wt loss)
      • Low CTE in the Z-axis 2.8% (50C-260C)
    • T260: >60 minutes
    • T288: >60 minutes
    • RoHS Compliant
    • Electrical properties
      • Dk: 3.30
      • Df: 0.0036
      • Typical electrical properties over a broad frequency and temperature range per IPC-TM-650-
    • Core Material Standard Availability
      • Thickness 0.0025″-0.018″, 0.030″ and 0.060″
      • Available in full size sheet or panel form
    • Prepreg Standard Availability
      • Roll or panel form
      • Tooling of prepreg panels available
    • Copper Foil Type Availability
      • Standard HTE Grade 3
      • RTF (Reverse Treat Foil)
      • VLP-2 (2micron)
    • Copper weights
      • 1/2, 1 and 2 oz (18, 35 and 70 micron) available
      • Heavier copper available upon request
      • Thinner copper foil available upon request
    • Glass Fabric Availability
      • Standard E-glass
      • Square weave glass fabric available
      • Spread glass fabric available
    • Industry Approvals
      • UL 94 V-0
      • UL qualified – 130 MOT
      • Non-ANSI
      • IPC-4103/17