Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Reexamination Certificate
2006-02-22
2009-12-15
Berch, Mark L (Department: 1624)
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
C257S040000, C549S004000, C549S059000
Reexamination Certificate
active
07632947
ABSTRACT:
Pyrimidopyrimidine derivatives, organic thin film transistors using pyrimidopyrimidine derivatives and method for fabricating the same are provided. Pyrimidopyrimidine derivative structures, along with example syntheses, are provided. The pyrimidopyrimidine derivatives may be pyrimidopyrimidine oligothiophene derivatives in which an oligothiophene having p-type semiconductor characteristics may be bonded to a pyrimidopyrimidine having n-type semiconductor characteristics positioned substantially in the center of the molecules, thereby simultaneously exhibiting both p-type and n-type semiconductor characteristics. The pyrimidopyrimidine derivatives may be spin-coated at room, or ambient, temperature when applied to the fabrication of an electronic device, for example, organic thin film transistors. Organic thin film transistors using the pyrimidopyrimidine derivatives may provide higher charge carrier mobility and/or lower off-state leakage current.
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Jeong Eun Jeong
Lee Bang Lin
Lee Sang Yoon
Berch Mark L
Harness & Dickey & Pierce P.L.C.
Jaisle Cecilia M
Samsung Electronics Co,. Ltd
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