摘要:
One embodiment of the present invention is a semiconductor device which includes a gate electrode; a gate insulating film formed to cover the gate electrode; a semiconductor layer formed over the gate insulating film and placed above the gate electrode; a second insulating film formed over the semiconductor layer; a first insulating film formed over a top surface and a side surface of the second insulating film, a side surface of the semiconductor layer, and the gate insulating film; silicon layers and which are formed over the first insulating film and electrically connected to the semiconductor layer; and a source electrode and a drain electrode which are formed over the silicon layers. The source electrode and the drain electrode are electrically separated from each other over the first insulating film. The semiconductor layer is not in contact with each of the source electrode and the drain electrode.
摘要:
A process for reducing a radioactive material of an object containing a radioactive material to a safe level in a living environment includes releasing pressure including carrying out a heating process on an aqueous liquid that includes water, water-soluble liquid, or a mixture of water and water-soluble liquid, and the object in a state where temperature is less than or equal to a critical temperature of the aqueous liquid and pressure is greater than or equal to a saturated vapor pressure of the aqueous liquid when the object is immersed in the aqueous liquid to such a degree that the object is covered or to a greater degree and then abruptly releasing the pressure, and separating, after the releasing pressure, the mixture of the object and the aqueous liquid into liquid and solid.
摘要:
The present invention provides a manufacturing technique of a semiconductor device and a display device using a peeling process, in which a transfer process can be conducted with a good state in which a shape and property of an element before peeling are kept. Further, the present invention provides a manufacturing technique of more highly reliable semiconductor devices and display devices with high yield without complicating the apparatus and the process for manufacturing. According to the present invention, an organic compound layer including a photocatalyst substance is formed over a first substrate having a light-transmitting property, an element layer is formed over the organic compound layer including a photocatalyst substance, the organic compound layer including a photocatalyst substance is irradiated with light which has passed through the first substrate, and the element layer is peeled from the first substrate.
摘要:
Provided are a process and device for reducing radioactive material of an object containing the radioactive material to a safe level in a living environment.Included are a step of performing at least a step of carrying out a heating process on the object, into which radioactive material is absorbed and/or adsorbed from an environment or which absorbs and/or adsorbs radioactive material from an environment, in a state where temperature is less than or equal to the critical temperature of water and pressure is greater than or equal to the saturated vapor pressure of water, or a step of abruptly releasing the pressure; and a step of separating, after the above step, into liquid and solid.
摘要:
To provide a manufacturing method of a microcrystalline silicon film having both high crystallinity and high film density. In the manufacturing method of a microcrystalline silicon film according to the present invention, a first microcrystalline silicon film that includes mixed phase grains is formed over an insulating film under a first condition, and a second microcrystalline silicon film is formed thereover under a second condition. The first condition and the second condition are a condition in which a deposition gas containing silicon and a gas containing hydrogen are used as a first source gas and a second source gas. The first source gas is supplied under the first condition in such a manner that supply of a first gas and supply of a second gas are alternately performed.
摘要:
A method for manufacturing a semiconductor device having favorable electric characteristics with high productivity is provided. A first microcrystalline semiconductor film is formed over an oxide insulating film under a first condition that mixed phase grains with high crystallinity are formed at a low particle density. After that, a second microcrystalline semiconductor film is stacked over the first microcrystalline semiconductor film under a second condition that a space between the mixed phase grains are filled by the crystal growth of the mixed phase grains of the first microcrystalline semiconductor film.
摘要:
A display device of which frame can be narrowed and of which display characteristics are excellent is provided. In a display device including a switch portion or a buffer portion, a logic circuit portion, and a pixel portion, the pixel portion includes a first inverted staggered TFT and a pixel electrode which is connected to a wiring of the first inverted staggered TFT, the switch portion or the buffer portion includes a second inverted staggered TFT in which a first insulating layer, a semiconductor layer, and a second insulating layer are interposed between a first gate electrode and a second gate electrode, the logic circuit portion includes an inverter circuit including a third inverted staggered thin film transistor and a fourth inverted staggered thin film transistor, and the first to the fourth inverted staggered thin film transistors have the same polarity. The inverter circuit may be an EDMOS circuit.
摘要:
A thin film transistor is provided, which includes a gate electrode layer over a substrate, a gate insulating layer over the gate electrode layer, a layer including an amorphous semiconductor over the gate insulating layer, a pair of crystal regions over the layer including the amorphous semiconductor, and source and drain regions over and in contact with the pair of crystal regions. The source and drain regions include a microcrystalline semiconductor layer to which an impurity imparting one conductivity type is added.
摘要:
A layer including a semiconductor film is formed over a glass substrate and is heated. A thermal expansion coefficient of the glass substrate is greater than 6×10−7/° C. and less than or equal to 38×10−7/° C. The heated layer including the semiconductor film is irradiated with a pulsed ultraviolet laser beam having a width of less than or equal to 100 μm, a ratio of width to length of 1:500 or more, and a full width at half maximum of the laser beam profile of less than or equal to 50 μm, so that a crystalline semiconductor film is formed. As the layer including the semiconductor film formed over the glass substrate, a layer whose total stress after heating is −500 N/m to +50 N/m, inclusive is formed.
摘要:
A seed crystal including mixed phase grains having high crystallinity at a low density is formed under a first condition over an insulating film, and then a first microcrystalline semiconductor film is formed over the seed crystal under a second condition that allows the mixed phase grains to grow and a space between the mixed phase grains to be filled. Then, a second microcrystalline semiconductor film is formed over the first microcrystalline semiconductor film under a third condition that allows formation of a microcrystalline semiconductor film having high crystallinity without increasing the space between the mixed phase grains included in the first microcrystalline semiconductor film.