Data Sheet

Technical data Original Bungard presensitized base material FR4
Material FR4 - 86 V0 with UV blocker
Standard DIN IEC 249, MIL-S-13949 H, CSA, ISO 9002, ISO 14001
UL Approval E 98983 / E 213990
Property Pre-treatment Specification Unit Typ. measured
Flexural strength lengthwise A > 415 N/mm² 485 - 550
Flexural strenght crosswise A > 350 N/mm² 400 - 450
Dimension stability X/Y E-2/150 < 0.05 % < 0.03
Moisture absorbtion D-24/23 < 0.35 % < 0.10
Copper peeling strength A 1.4 N/mm > 1.80
(35 µm Cu) after 10s at 288 °C
Thermal expansion coeff.
in Z before Tg TMA - mm/mm/°C 5 x 10
-5
in Z after Tg TMA - mm/mm/°C 20 x 10
-5
Dielectric breakdown D 48/50 > 40 kV > 60
Dielectric constant e
r
1 MHz C-24/23/50 < 5.4 - 4.2 - 4.8
Dissipation factor tan δ 1 MHz C-24/23/50 < 0.035 - 0.01 - 0.016
Surface Resistivity C-96/35/90 > 10
4
MΩ 5 x 10
6
- 5 x 10
7
Volume Resistivity C-96/35/90 > 10
6
MΩ / cm 5 x 10
8
- 5 x 10
9
Arc resistance D-48/50+D-0.5/23 > 60 sec > 120
Flammability rating (UL 94) A 94 V-0 - 94 V-0
Glas transition temp. TG DSC - °C 140 ± 5
Boiling test 30 min 288 °C dipped - sec 230
Lotbadfestigkeit 288 °C dipped > 10 sec > 200
Thickness tolerance dielectric MIL Class II 1.55 +/- 0.08 mm
Thickness tolerance copper 35 µm +/- 5 µm
Deformation rel. to diagonal length < 3 % < 3