FR4 CNC Machining

2026-03-01      

Mechanical properties

Vertical bending strength A: Normal: E-1/150, 150±5℃≥340Mpa

Parallel laminar impact strength (simply supported beam method): ≥ 230KJ/m

Insulation resistance after water immersion (D-24/23): ≥ 5.0×108Ω

Vertical layer to electrical strength (in 90 ± 2 ℃ transformer oil, plate thickness of 1mm): ≥ 14.2MV / m

Parallel layer breakdown voltage (in 90 ± 2 ℃ transformer oil): ≥ 40KV

Relative dielectric constant (50Hz): ≤5.5

Relative permittivity (1MHz): ≤5.5

Dielectric loss factor (50Hz): ≤0.04

Dielectric loss factor (1MHz): ≤0.04

Water absorption (D-24/23, plate thickness 1.6mm): ≤19mg

Density: 1.70-1.90g/cm³

Flammability: FV0

Heat treatment

Melting point of FR-4 process press board (203℃)

High chemical resistance

Low loss coefficient (Df 0.0025)

Stable and low dielectric constant (Dk 2.35)

Thermoplastic material