摘要:
It is an object of the present invention to form a plurality of elements in a limited area to reduce the area occupied by the elements for integration so that further higher resolution (increase in number of pixels), reduction of each display pixel pitch with miniaturization, and integration of a driver circuit that drives a pixel portion can be advanced in semiconductor devices such as liquid crystal display devices and light-emitting devices that has EL elements. A photomask or a reticle provided with an assist pattern that is composed of a diffraction grating pattern or a semi-transparent film and has a function of reducing a light intensity is applied to a photolithography process for forming a gate electrode to form a complicated gate electrode. In addition, a top-gate TFT that has the multi-gate structure described above and a top gate TFT that has a single-gate structure can be formed on the same substrate just by changing the mask without increasing the number of processes.
摘要:
An object of the invention is to provide a light emitting device in which the variation in emission spectrum depending on an angle for seeing a surface through which light is emitted is reduced. The light emitting device of the invention includes a first insulating layer formed over a substrate, a second insulating layer formed over the first insulating layer, and a semiconductor layer formed over the second insulating layer. A gate insulating layer is formed to cover the second insulating layer and the semiconductor layer. A gate electrode is formed over the gate insulating layer. A first interlayer insulating layer is formed to cover the gate insulating layer and the gate electrode. An opening is formed through the first interlayer insulating layer, the gate insulating layer and the second insulating layer. A second interlayer insulating layer is formed to cover the first insulating layer and the opening. A light emitting element is formed over the opening.
摘要:
A first amorphous semiconductor film is formed on an insulating surface. A catalyst element for promoting crystallization is added thereto. Thereafter, by a first heat treatment in an inert gas, a first crystalline semiconductor film is formed. A barrier layer and a second semiconductor layer are formed on the first crystalline semiconductor film. The second semiconductor layer contains a rare gas element at a concentration of 1×1019 to 2×1022/cm3, preferably 1×1020 to 1×1021/cm3 and oxygen at a concentration of 5×1017 to 1×1021/cm3. Subsequently, by a second treatment in an inert gas, the catalyst element remaining in the first crystalline semiconductor film is moved to the second semiconductor film.
摘要翻译:在绝缘表面上形成第一非晶半导体膜。 加入促进结晶的催化剂元素。 此后,通过在惰性气体中的第一次热处理,形成第一晶体半导体膜。 在第一结晶半导体膜上形成阻挡层和第二半导体层。 第二半导体层含有浓度为1×10 19至2×10 22 / cm 3的稀有气体元素,优选为1×10 20, 浓度为5×10 17至1×10 21 / cm 3的氧气和1×10 12 / cm 3 3 SUP>。 随后,通过在惰性气体中的第二次处理,残留在第一结晶半导体膜中的催化剂元素移动到第二半导体膜。
摘要:
A crystal growth 301 is carried out by diffusing a metal element, and a nickel element is moved into regions 108 and 109 which has been doped with phosphorus. An axis coincident with the moving directions 302 and 303 of the nickel element at this time is made to coincide with an axis coincident with the direction of the crystal growth, and a TFT having the regions as channel forming regions is manufactured. In the path of the region where nickel moved, since high crystallinity is obtained in the moving direction, the TFT having high characteristics can be obtained by this way.
摘要:
A TFT having stable characteristics is obtained by using a crystal silicon film obtained by crystallizing an amorphous silicon film by using nickel. Phosphorus ions are implanted to regions 111 and 112 by using a mask 109. Then, a heat treatment is performed to getter nickel existing in a region 113 to the regions 111 and 112. Then, the mask 109 is side-etched to obtain a pattern 115. Then, the regions 111 and 112 are removed by utilizing the pattern 115 and to pattern the region 113. Thus, a region 116 from which nickel element has been removed is obtained. The TFT is fabricated by using the region 116 as an active layer.
摘要:
To provide a method of removing a catalyst element from a crystalline silicon film obtained by solid phase growth using the catalyst element promoting crystallization, phosphorus is implanted selectively to the crystalline silicon film having the catalyst element whereby a portion of the silicon film implanted with phosphorus is made amorphous, and when a thermal annealing treatment is performed and the silicon film is heated, the catalyst element is moved to an amorphous portion implanted with phosphorus having large gettering capacity by which the concentration of the catalyst element in the silicon film is lowered and a semiconductor device is fabricated by using the silicon film.
摘要:
A first amorphous semiconductor film is formed on an insulating surface. A catalyst element for promoting crystallization is added thereto. Thereafter, by a first heat treatment in an inert gas, a first crystalline semiconductor film is formed. A barrier layer and a second semiconductor layer are formed on the first crystalline semiconductor film. The second semiconductor layer contains a rare gas element at a concentration of 1×1019 to 2×1022/cm3, preferably 1×1020 to 1×1021/cm3 and oxygen at a concentration of 5×1017 to 1×1021/cm3. Subsequently, by a second treatment in an inert gas, the catalyst element remaining in the first crystalline semiconductor film is moved to the second semiconductor film.
摘要:
A TFT using an aluminum material for a gate electrode is manufactured at a high yield factor. The gate electrode provided over an active layer and a gate insulating film is constituted by a lamination film of a tantalum layer and an aluminum layer. In this structure, the tantalum layer functions as a stopper, so that it is possible to prevent a constituent material of the aluminum layer from intruding into the gate insulating film. An end portion of the tantalum layer is transformed into tantalum oxide, which has an effect to lower damage at ion implantation to the gate insulating film in the formation of an LDD region.
摘要:
In producing TFT by crystallizing an amorphous silicon film by the action of nickel, the influence of nickel on the TFT produced is inhibited. A mask 104 is formed over an amorphous silicon film 102, and a nickel-containing solution is applied thereover. In that condition, nickel is kept in contact with the surface of the amorphous silicon film at the opening 103 of the mask. Then, this is heated to crystallize the amorphous silicon film. Next, a phosphorus-containing solution is applied thereto, so that phosphorus is introduced into the silicon film in the region of the opening 103. This is again heated, whereby nickel is gettered in the region into which phosphorus has been introduced. In this process, the nickel concentration in the silicon film is reduced.
摘要:
A TFT having stable characteristics is obtained by using a crystal silicon film obtained by crystallizing an amorphous silicon film by using nickel. Phosphorus ions are implanted to regions 111 and 112 by using a mask 109. Then, a heat treatment is performed to getter nickel existing in a region 113 to the regions 111 and 112. Then, the mask 109 is side-etched to obtain a pattern 115. Then, the regions 111 and 112 are removed by utilizing the pattern 115 and to pattern the region 113. Thus, a region 116 from which nickel element has been removed is obtained. The TFT is fabricated by using the region 116 as an active layer.