Material Properties

We attach the table with the materials approved to Lab Circuits.

Note: values given by the manufacturers.
(*) LAB Circuits UL approved

FR4 low Tg FR4 mid Tg FR4 high Tg Enhanced Epoxy resin high Tg Hydrocarbon / Ceramic Hydrocarbon / Ceramic Hydrocarbon / Ceramic PolyImide PolyImide Coverlay Units
Industry Approvals spacer IPC 4101/21 IPC 4101/97/98/99/101 IPC 4101/98/99/101/126 IPC4103/17
IPC4101/102
IPC 4103/10 IPC 4103/11 IPC 4103/11 IPC 4204/11 IPC 4203/1 -
Dielectric Constant (Dk) spacer 4.37 @1 GHz 4.55 @1 GHz 4.17 @1 GHz 3.45 @10GHz 3.38±0.05 @10 GHz 3.48±0.05 @10 GHz 3.54±0.05 @10 GHz 3.4 @1 MHz 3.6 @1 MHz -
Dielectric Constant (DK) for impedance calculation spacer 4.0 @ 1 GHz 4.0 @ 1 GHz 4.0 @ 1 GHz 3.45 @10GHz 3.55 @ 10 GHz 3.55 @ 10 GHz 3.55 @ 10 GHz 3.4 @ 1 MHz 3.6 @ 1 MHz -
Dissipation Factor (Df) spacer 0.0195 @ 1 GHz 0.0160 @ 1 GHz 0.0195 @ 1 GHz 0.0031 @10GHz 0.0027 @10 GHz 0.0037 @10 GHz 0.004 @10 GHz 0.002 @1 MHz 0.02 @1 MHz -
Dielectric Strength spacer 990 1370 1350 1133 780 780 1000 6500 6500 V/mil
Glass Transition Temperature (Tg) spacer 135 155 180 200 >280 >280 >280 220 220 ºC
Decomposition Temperature (Td) spacer - 345 340 360 425 390 390 390 390 ºC
Time to delamination@260ºC (T260) spacer - 75 >60 >60 >60 >60 >60 - - s
Time to delamination@288ºC (T288) spacer >10 25 >10 >60 >10 >10 >10 >10 - s
CTE X spacer 17 - 13 12 11 14 19 - - ppm/ºC
CTE Y spacer 12 - 14 12 14 16 17 - - ppm/ºC
CTE Z spacer 45 40 45 55 46 35 50 25 - ppm/ºC
CTE Z after Tg spacer 208 190 225 290 - - - 40 - ppm/ºC
Moisture Absortion spacer 0.16 0.13 0.15 0.1 0.06 0.06 0.05 0.8 - %
CTI spacer 175-250 175-250 175-250 175-249 - - - 100-174 (4) - V
Flammability spacer V-0 (*) V-0 (*) V-0 (*) V-0 N/A V-0 V-0 V-0 (*) V-0 (*) class
Remark spacer - CAF low CTE CAF Resistant CAF Resistant High Frequency High Frequency High Frequency Adhesivless
/ Rigiflex
Acrylic adhesive
/ Rigiflex
-
Product spacer NP-140 / VT-42 VT-481 PCL 370HR I-Tera® MT40 RO4003C RO4350B RO4450F Prepreg Pyralux AP (UL-V0)
Taiflex 2FP
FR110/FR210 (UL-V0)
LF110/LF210
-
Manufacturer spacer NAN YA / Ventec Ventec Isola Isola Rogers Corporation Rogers Corporation Rogers Corporation Dupont / Taiflex DuPont -

Last update: 21-06-2023