Utilizing extended technology for higher performance, CLTE-XT laminates are ceramic/PTFE microwave composites that provide the lowest insertion loss and highest degree of dimensional stability in its class. Building on the reliability of the CLTE laminates, CLTE-XT maintains its properties over an even wider temperature range.  

  • Loss Tangent of .0012 at 10GHz
  • Low Z-axis CTE of 20 ppm/°C
  • Tightest dielectric constant tolerance in the CLTE family (+/- .03)

Benefits

  • High plated through hole reliability
  • Repeatable lot-to-lot performance
  • Reduced circuit losses without sacrificing dimensional stability

Please see below for a sampling of data for this material formulation. For detailed material information and to use advanced features such as filtering, visit the Laminate Properties Tool.

CLTE™ CLTE-XT™
Dielectric Constant, @10GHZ (2.5 GHz) Typical (Process) 2.98+/-0.04 2.94+/-0.03*
Dielectric Constant, @10GHZ (2.5 GHz) Typical (Design) 2.98 2.94
Dissipation Factor TAN @10 GHz (2.5 GHz) (Typical) 0.0023 0.0012
Thermal Coefficient εr -50°C to 150°C ppm/°C (Typical) -9 -9
Volume Resistivity Mohm (Typical) 1.4x109 4.3x108
Surface Resistivity Mohm (Typical) 1.3x106 2.5x108
Water Absorption D48/50% (Typical) 0.0422 0.0222
Thermal Conductivity W/m/°K (Typical) 50°C ASTM D5470 0.50 0.56
Coefficient of Thermal Expansion -55° to 288°C ppm/°C (Typical) X 9.9 12.7
Coefficient of Thermal Expansion -55° to 288°C ppm/°C (Typical) Y 9.4 13.7
Coefficient of Thermal Expansion -55° to 288°C ppm/°C (Typical) Z 57.9 40.8
Peel Strength 1 oz (35um) ED Foil lbs/in. (N/mm) (Typical) 7.0 (1.25) 7.2 (1.29)
Density gm/cm3 (Typical) 2.38 2.02
Flammability Rating UL94 V-0 V-0
Lead-Free Process Compatible Y Y
PIM dBc Typical

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