Table 4: Planar coil materials and their properties.

Coil materialsRelative permeabilityDensity
(g/cm3)
Electrical resistivity at 20°C
(nΩ·m)
Thermal conductivity
(W/mK)

Copper0.998.9616.78401
Silver0.9910.415.87429
Aluminium1.002.728.2237
Gold119.324.4318