Patent ID: 8624650
Filing Date: 2014-01-07
Classification: H01L,H03K

Abstract:
1. A semiconductor device comprising: a first transistor; a second transistor; a first inverter circuit comprising first inverter transistors; and a second inverter circuit comprising second inverter transistors, wherein one of a source and a drain of the first transistor is electrically connected to a first wiring; wherein the other of the source and the drain of the first transistor is electrically connected to an input of the first inverter circuit; wherein an output of the first inverter circuit is electrically connected to one of a source and a drain of the second transistor; wherein the other of the source and the drain of the second transistor is electrically connected to an input of the second inverter circuit; wherein an output of the second inverter circuit is electrically connected to a second wiring; wherein each of the first transistor and the second transistor comprises a channel formation region in an oxide semiconductor layer; and wherein at least one of the first inverter transistors and one of the second inverter transistors comprise a channel formation region in a material other than an oxide semiconductor material.