Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2006-08-29
2006-08-29
Dye, Rena (Department: 1774)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S917000, C313S504000, C313S506000, C257S040000, C252S301350, C528S403000
Reexamination Certificate
active
07097919
ABSTRACT:
A polymeric fluorescent substance has a prolonged service life and high luminescence brightness. The substance also has excellent thermal stability and good practicality. The polymeric fluorescent substance is adapted for emission of visible fluorescence in a solid state, and includes at least one type of repeating units represented by a specified chemical formula (1). In addition, the substance has a number average molecular weight of 103to 108as determined using polystyrene as a standard. A process for producing the polymeric fluorescent substance, and an organic EL element using the polymeric fluorescent substance are also provided.
REFERENCES:
patent: 4465835 (1984-08-01), Takizawa et al.
patent: 5247190 (1993-09-01), Friend et al.
patent: 6949291 (2005-09-01), Holmes et al.
patent: 06-016801 (1994-01-01), None
patent: 2002-284862 (2002-10-01), None
Braun et al., “Visible light emission from semiconducting polymer diodes”, Appl. Phys. Lett., vol. 58, No. 18, May 6, 1991, pp. 1982-1984.
Burroughes et al., “Light-emitting diodes based on conjugated polymers”, Nature, vol. 347, Oct. 11, 1990, pp. 539-541.
Fukuda et al., “Fusible Conducting Poly (9-alkylfluorene) and Poly (9,9-dialkylfluorene) and Their Characteristics”, Japanese Journal of Applied Physics, vol. 28, No. 8, Aug. 1989, pp. L 1433-L 1435.
Ohmori et al., “Blue Electroluminescent Diodes Utilizing Poly(alkylfluorene)”, Japanese Journal of Applied Physics, vol. 30, No. 11B, Nov. 1991, pp. L 1941-L 1943.
Weinfurtner et al., “Highly efficient pure blue electroluminescence from polyfluorene: Influence of the molecular weight distribution on the aggregation tendency”, Applied Physics Letters, vol. 76, No. 18, May 1, 2000, pp. 2502-2504.
Dai Nippon Printing Co. Ltd
Dye Rena
Thompson Camie S.
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