Mica capacitors are manufactured out of silvered mica plates staked alternatively between layers of metallic foils (brass, tin, alloy, lead or copper) and then clamped together to produce voids between the foils and the dielectric, as well as, to reduce the capacitance variation and size to improve stability. On each of the stake an annealed copper lead wire contact or terminal is soldered.

Mica capacitors are manufactured out of silvered mica plates staked alternatively between layers of metallic foils (brass, tin, alloy, lead or copper) and then clamped together to produce voids between the foils and the dielectric, as well as, to reduce the capacitance variation and size to improve stability. On each of the stake an annealed copper lead wire contact or terminal is soldered.