| 摘要 |
To provide a semiconductor device with low power consumption in which a malfunction due to drop in voltage, delay of signal transmission, distortion of a signal waveform, and the like, which are caused by increase in wiring resistance, and decrease in reliability are prevented. A gate wiring is formed of a conductive layer containing copper, and a signal wiring formed of part of the same conductive layer as a source electrode and a drain electrode and a wiring formed of part of the same conductive layer as the gate wiring are electrically connected to each other in series or in parallel; thus, wiring resistance of the signal wiring is substantially decreased without an increase in width or thickness of the signal wiring.
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