An electromagnetic shield has a first patterned or apertured layer having
non-conductive materials and conductive material and a second patterned
or apertured layer having non-conductive materials and conductive
material. The conductive material may be a metal, a carbon composite, or
a polymer composite. The non-conductive materials in the first patterned
or apertured layer may be randomly located or located in a predetermined
segmented pattern such that the non-conductive materials in the first
patterned or apertured layer are located in a predetermined segmented
pattern with respect to locations of the non-conductive materials in the
second patterned or apertured layer.
