Abstract: The present invention provides a semi-transparent shielding bag, which is formed by a semi-transparent composite film. The film may include a first polymeric layer usable as an inner layer of the semi-transparent shielding bag, a second polymeric layer usable as an outer layer of the semi-transparent shielding bag and a non-stoichiometric metal oxide layer in between the two polymeric layers. The semi-transparent shielding bag may be usable for packaging an object sensitive to moisture and electrostatic discharge and may provide electrostatic discharge protection by forming a Faraday cage around the object.

Abstract: The present invention provides a composite film comprising a substrate, the substrate has a layer of a non-stoichiometric metal oxide. The present invention further provides a method for producing a composite film comprising depositing a layer of a non-stoichiometric metal oxide on a substrate. The present invention further provides a material comprising the composite film.