Logic circuit
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United States of America Patent
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Jul 14, 2015
Grant Date -
Jun 13, 2013
app pub date -
Feb 7, 2013
filing date -
Oct 31, 2008
priority date (Note) -
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Abstract
An object is to apply a transistor using an oxide semiconductor to a logic circuit including an enhancement transistor. The logic circuit includes a depletion transistor 101 and an enhancement transistor 102. The transistors 101 and 102 each include a gate electrode, a gate insulating layer, a first oxide semiconductor layer, a second oxide semiconductor layer, a source electrode, and a drain electrode. The transistor 102 includes a reduction prevention layer provided over a region in the first oxide semiconductor layer between the source electrode and the drain electrode.
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