Abstract:
A semiconductor device with a novel structure is provided in which stored data can be held even when power is not supplied and the number of writing is not limited. The semiconductor includes a second transistor and a capacitor over a first transistor. The capacitor includes a source or drain electrode and a gate insulating layer of the second transistor and a capacitor electrode over an insulating layer which covers the second transistor. The gate electrode of the second transistor and the capacitor electrode overlap at least partly with each other with the insulating layer interposed therebetween. By forming the gate electrode of the second transistor and the capacitor electrode using different layers, an integration degree of the semiconductor device can be improved.
Abstract:
A semiconductor device including a nonvolatile memory cell in which a writing transistor which includes an oxide semiconductor, a reading transistor which includes a semiconductor material different from that of the writing transistor, and a capacitor are included is provided. Data is written to the memory cell by turning on the writing transistor and applying a potential to a node where a source electrode (or a drain electrode) of the writing transistor, one electrode of the capacitor, and a gate electrode of the reading transistor are electrically connected, and then turning off the writing transistor, so that the predetermined amount of charge is held in the node. Further, when a p-channel transistor is used as the reading transistor, a reading potential is a positive potential.
Abstract:
An object is to provide a semiconductor device with a novel structure. The semiconductor device includes a first wiring; a second wiring; a third wiring; a fourth wiring; a first transistor having a first gate electrode, a first source electrode, and a first drain electrode; and a second transistor having a second gate electrode, a second source electrode, and a second drain electrode. The first transistor is provided in a substrate including a semiconductor material. The second transistor includes an oxide semiconductor layer.
Abstract:
A novel semiconductor device where multilevel data can be written and read. The semiconductor device includes first to fifth transistors, a capacitor, a bit line, and a power supply line. Write operation is performed in such a manner that first data is supplied to a gate of the fifth transistor through the first transistor; the first transistor is turned off; second data is supplied to a second electrode of the capacitor through the second transistor to convert the first data into third data; and the second electrode of the capacitor are made electrically floating. The second electrode of the capacitor is initialized to GND through the third transistor. Read operation is performed by charging or discharging the bit line through the fourth transistor and the fifth transistor. The first to third transistors are preferably oxide semiconductor transistors.
Abstract:
To provide a semiconductor device capable of adjusting the timing of a clock signal or a high-quality semiconductor device. The semiconductor device includes a first transistor and a circuit including a second transistor. A channel of the first transistor is formed in an oxide semiconductor layer. A first signal is input to one of a source and a drain of the first transistor. The other of the source and the drain of the first transistor is electrically connected to a gate of the second transistor. A first clock signal is input to the circuit. The circuit outputs a second clock signal. The timing of the second clock signal is different from that of the first clock signal.
Abstract:
A semiconductor device with short overhead time. The semiconductor device includes a first wiring supplied with a power supply potential, a second wiring, a switch for controlling electrical connection between the first wiring and the second wiring, a load electrically connected to the second wiring, a transistor whose source and drain are electrically connected to the second wiring, and a power management unit having functions of controlling the conduction state of the switch and controlling a gate potential of the transistor. A channel formation region of the transistor is included in an oxide semiconductor film.
Abstract:
To read multilevel data from a memory cell having a transistor using silicon and a transistor using an oxide semiconductor, without switching a signal for reading the multilevel data in accordance with the number of the levels of the multilevel data. The electrical charge of a bit line is discharged, the potential of the bit line is charged via a transistor for writing data, and the potential of the bit line which is changed by the charging is read as multilevel data. With such a structure, the potential corresponding to data held in a gate of the transistor can be read by only one-time switching of a signal for reading data.
Abstract:
It is an object of the present invention to provide a semiconductor display device having an interlayer insulating film which can obtain planarity of a surface while controlling film formation time, can control treatment time of heating treatment with an object of removing moisture, and can prevent moisture in the interlayer insulating film from being discharged to a film or an electrode adjacent to the interlayer insulating film. An inorganic insulating film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is formed so as to cover a TFT. Next, an organic resin film containing photosensitive acrylic resin is applied to the organic insulting film, and the organic resin film is partially exposed to light to be opened. Thereafter, an inorganic insulting film containing nitrogen, which is less likely to transmit moisture compared with an organic resin, is formed so as to cover the opened organic resin film. Then, in the opening part of the organic resin film, a gate insulating film and the two layer inorganic insulating film containing nitrogen are opened partially by etching to expose an active layer of the TFT.
Abstract:
The invention provides a processor obtained by forming a high functional integrated circuit using a polycrystalline semiconductor over a substrate which is sensitive to heat, such as a plastic substrate or a plastic film substrate. Moreover, the invention provides a wireless processor, a wireless memory, and an information processing system thereof which transmit and receive power or signals wirelessly. According to the invention, an information processing system includes an element forming region including a transistor which has at least a channel forming region formed of a semiconductor film separated into islands with a thickness of 10 to 200 nm, and an antenna. The transistor is fixed on a flexible substrate. The wireless processor in which a high functional integrated circuit including the element forming region is formed and the semiconductor device transmit and receive data through the antenna.
Abstract:
An object is to provide a semiconductor device having a novel structure. A first wiring; a second wiring; a third wiring, a fourth wiring; a first transistor including a first gate electrode, a first source electrode, and a first drain electrode; a second transistor including a second gate electrode, a second source electrode, and a second drain electrode are included. The first transistor is provided over a substrate including a semiconductor material and a second transistor includes an oxide semiconductor layer.