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Aluminum oxide and aluminum oxynitride layers for use with phosphors for electroluminescent displays

  • US 7,812,522 B2
  • Filed: 07/19/2005
  • Issued: 10/12/2010
  • Est. Priority Date: 07/22/2004
  • Status: Expired due to Fees
First Claim
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1. A phosphor laminate for a thick dielectric film electroluminescent device, said laminate comprising:

  • a rare earth activated alkaline earth thioaluminate phosphor thin film layer;

    an aluminum oxide or aluminum oxynitride layer having a thickness of 20 nm to 50 nm provided directly adjacent and in contact with a bottom of said phosphor thin film layer;

    a thick film dielectric layer below said aluminum oxide or aluminum oxynitride layer, the thick film dielectric layer comprising a bottom layer and a smoothing layer; and

    a layer of barium titanate provided on top of said smoothing layer.

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