Patent ID: 6873101

Claim:
In a light-emitting device comprising a layer of an active light-emitting polymer sandwiched between a cathode and an anode and a protective layer, the improvement of the protective layer consisting essentially of: an encapsulating layer of low-temperature-applied inorganic material protecting the device against environmental attack, wherein the low-temperature-applied inorganic material comprises a nitride of boron (B), aluminum (Al), gallium (Ga), indium (In), thallium (Tl), carbon (C), silicon (Si), germanium (Ge), tin (Sn) or lead (Pb); a low-temperature-applied coating comprising a non-reactive metal, wherein the low-temperature-applied coating is located between the device and the layer of inorganic material such that the low-temperature applied coating is next to the layer of inorganic material; and a protective cover plate attached to the layer of inorganic material such that the layer of inorganic material is located between the low-temperature-applied coating and the protective cover plate.