Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 21, 2014
Patent Application Number
13688596
Date Filed
November 29, 2012
Patent Citations Received
Patent Primary Examiner
Patent abstract
An object is to improve field effect mobility of a thin film transistor using an oxide semiconductor. Another object is to suppress increase in off current even in a thin film transistor with improved field effect mobility. In a thin film transistor using an oxide semiconductor layer, by forming a semiconductor layer having higher electrical conductivity and a smaller thickness than the oxide semiconductor layer between the oxide semiconductor layer and a gate insulating layer, field effect mobility of the thin film transistor can be improved, and increase in off current can be suppressed.
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