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 4101C/21 IPC 4101C/24/21
/97/98/99/101/121
IPC 4101C/26/98/126 IPC 4101/29 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 3.20 @10 GHz 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 3.4 @ 10 GHz 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 0.008 @ 10 GHz 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 1000 780 780 1000 6500 6500 V/mil
Glass Transition Temperature (Tg) spacer 135 155 180 210 >280 >280 >280 220 220 ºC
Decomposition Temperature (Td) spacer - 345 340 365 425 390 390 390 390 ºC
Time to delamination@260ºC (T260) spacer - 75 >60 >30 >60 >60 >60 - - s
Time to delamination@288ºC (T288) spacer >10 25 >10 >10 >10 >10 >10 >10 - s
CTE X spacer 17 - 13 9 11 14 19 - - ppm/ºC
CTE Y spacer 12 - 14 13 14 16 17 - - ppm/ºC
CTE Z spacer 45 40 45 70 46 35 50 25 - ppm/ºC
CTE Z after Tg spacer 208 190 225 - - - - 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 - - - - - - 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 N4000-13SI RO4003C RO4350B RO4450B Prepreg Pyralux AP / 2FP LF210 / T1612 -
Manufacturer spacer NAN YA / Ventec Ventec Isola Nelco Rogers Corporation Rogers Corporation Rogers Corporation Dupont / Taiflex Dupont / Sheldahl -

Last update: 22-09-2017