Vertical layer orientation Bending strength A: Normal state: E-1/150,150±5℃≥340Mpa Parallel layer orientation the impact strength (simple beam method): ≥230KJ/m Insulation resistance after immersion(D-24/23): ≥5.0×108Ω Vertical layer orientation Electrical strength( In 90±2℃ transformer oil, board thickness:1mm ): ≥14.2MV/m Parallel layer orientation Breakdown voltage: ≥40KV Relative permittivity (50Hz):≤5.5 Relative permittivity (1MHz):≤5.5 Dielectric… Continue Reading FR-4 Performance characteristics