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Organic electroluminescent device having a protective covering comprising organic and inorganic layers

  • US 6,198,217 B1
  • Filed: 05/08/1998
  • Issued: 03/06/2001
  • Est. Priority Date: 05/12/1997
  • Status: Expired due to Term
First Claim
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1. In an organic electroluminescent device comprising an electroluminescent unit including a pair of electrodes and an organic layer structure provided between the pair of electrodes and capable of emitting light on application of a voltage thereto via the pair of electrodes, and a dual layer protective covering formed on said electrolumescent unit, wherein said dual layer consists of a single organic barrier layer covering and in contact with said electroluminescent unit and a single inorganic barrier layer formed on said organic barrier layer.

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