Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2004-03-24
2010-06-29
Tarazano, D. Lawrence (Department: 1794)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S504000, C313S506000
Reexamination Certificate
active
07745015
ABSTRACT:
An organic electroluminescent device comprises a plurality of stacked layers of polymeric materials soluble in an organic solvent. As a polymeric material forming a lower layer, a polymeric material is selected having a molecular weight greater than the molecular weight of a polymeric material of a layer to be formed on the lower layer. As an organic solvent for dissolving the polymeric material forming the lower layer, an organic solvent is selected having a dielectric constant greater than the dielectric constant of an organic solvent for dissolving the polymeric material forming an upper layer. With a light emitting layer being the lower layer and an electron transport layer being the upper layer, it is preferable that the electron transport layer includes a polymeric material having hole blocking property. With a light emitting layer being the lower layer and an electron transport layer being the upper layer, it is preferable that the repeating unit of the polymeric material forming the light emitting layer and the repeating unit of the polymeric material forming the electron transport layer include the same chemical structure.
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Japanese Office Action, with English Translation, issued in Japanese Patent Application No. JP 2004-055397, mailed on Mar. 25, 2008.
Japanese Office Action, with English Translation, issued in Japanese Patent Application No. 2004-055397, dated on Nov. 27, 2007.
Hirayama Yasuko
Sakakibara Takahisa
Sano Takeshi
McDermott Will & Emery LLP
Sanyo Electric Co,. Ltd.
Tarazano D. Lawrence
Thompson Camie S
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