摘要:
It is a problem to provide a semiconductor device production system using a laser crystallization method capable of preventing grain boundaries from forming in a TFT channel region and further preventing conspicuous lowering in TFT mobility due to grain boundaries, on-current decrease or off-current increase. An insulation film is formed on a substrate, and a semiconductor film is formed on the insulation film. Due to this, preferentially formed is a region in the semiconductor film to be concentratedly applied by stress during crystallization with laser light. Specifically, a stripe-formed or rectangular concavo-convex is formed on the semiconductor film. Continuous-oscillation laser light is irradiated along the striped concavo-convex or along a direction of a longer or shorter axis of rectangle.
摘要:
The invention relates to a transistor that includes a semiconductive layer on an insulator layer. Below the insulator layer is a substrate and a contact is disposed in the insulator layer that originates at the substrate and terminates in the insulator layer. The contact is aligned below the transistor junction. The invention also relates to a process flow that is used to fabricate the transistor. The process flow includes forming the contact by either a spacer etch or a directional, angular etch.
摘要:
The semiconductor device comprises a semiconductor layer 18 formed on an insulation layer 16, a gate electrode 22 formed on the semiconductor layer with a gate insulation film 20 formed therebetween, a source/drain region 24 formed on the semiconductor layer on both sides of the gate electrode, and a semiconductor region 14 buried in the insulation layer 16 in a region below the gate electrode. The surface scattering of the carriers and phonon scattering can be prevented while suppressing the short channel effect. Resultantly the semiconductor device can have high mobility and high speed.
摘要:
An SOI semiconductor device includes at least an SOI substrate including an insulating film and a semiconductor layer formed on the insulating film; and an active semiconductor element formed on the semiconductor layer. The active semiconductor element is formed in an element formation region surrounded by an isolating region for isolating the semiconductor layer in a form of an island. A gettering layer containing a high concentration impurity is formed in a portion of the semiconductor layer excluding the element formation region in which the active semiconductor element is formed, and the gettering layer is not formed in the element formation region in which the active semiconductor element is formed.
摘要:
A method and structure for forming patterned SOI regions and bulk regions is described wherein a silicon containing layer over an insulator may have a plurality of selected thickness' and wherein bulk regions may be suitable to form DRAM's and SOI regions may be suitable to form merged logic such as CMOS. Ion implantation of oxygen is used to formed patterned buried oxide layers at selected depths and mask edges may be shaped to form stepped oxide regions from one depth to another. Trenches may be formed through buried oxide end regions to remove high concentrations of dislocations in single crystal silicon containing substrates. The invention overcomes the problem of forming DRAM with a storage capacitor formed with a deep, trench in bulk Si while forming merged logic regions on SOI.
摘要:
Silicon and silicon-germanium semiconductor-on-insulator structures are formed with strong bonds between the silicon or silicon-germanium layer and the underlying insulating substrate with low defects in the semiconductor and minimal flaws in the bonding between the semiconductor layer and the substrate. An oxide layer is initially formed on the semiconductor wafer, and the wafer may then be annealed, if necessary, to drive off water from the oxide layer so that the oxide layer is well below the water saturation of the oxide. The surfaces of the oxide layer and the substrate are then cleaned and placed into contact at relatively low temperatures to effect a strong bond. The semiconductor layer may then be thinned by mechanical or chemical processes, or both, and the completed structure annealed to perfect the bond between the semiconductor layer and the substrate.
摘要:
The present invention pertains to a high-performance thin film transistor having a gate and an active region, whose active region comprises a poly-Si1nullxGex alloy material and a channel layer of silicon, in which the channel layer of silicon is interposed between the poly-Si1nullxGex alloy material and the gate, and a method for fabricating such a high-performance thin film transistor.
摘要:
This invention provides a transparent CunullAlnullO semi-conducting film having a p-type conductivity greater than 0.95null10null1 Snullcmnull1. This invention also relates to a process for preparing a CunullAlnullO film having p-type conductivity, comprising: a) controllably vaporizing organo-copper and organo-aluminum precursors and carrying the vapors into a chemical vapor deposition chamber with an inert gas flow; b)reacting and depositing the vapors on a substrate, preferably a light-transmitting substrate, through a chemical vapor deposition process.
摘要:
A semiconductor device comprising an SOI substrate fabricated by forming a silicon layer 3 on an insulating layer 2, a plurality of active regions 3 horizontally arranged in the silicon layer 3, and element isolating parts 5 having a trench-like shape which is made of an insulator 5 embedded between the active regions 3 in the silicon layer 3, wherein the insulating layer 2 has spaces 6 positioned in the vicinity of interfaces between the active regions and the element isolating parts 5, whereby it becomes possible to reduce fixed charges or holes existing on a side of the insulating layer in interfaces between the silicon layer and the insulating layer, which fixed charges or holes are generated in a process of oxidation for forming the insulating layer on a bottom surface of the silicon layer.
摘要:
The present invention includes a semiconductor device having a shallow trench isolation and a method of fabricating the same. The semiconductor device includes a gate electrode being arranged to cross over the active region. An oxide pattern is interposed between the active region and the edge of the gate electrode. The oxide pattern defines a channel region under the gate electrode. A lightly doped diffusion layer is formed in the active region downward and outward from the oxide pattern, and a heavy doped diffusion layer is formed in a predetermined region of the active region and surrounded by the lightly doped diffusion layer. In the method of fabricating the semiconductor substrate, a trench isolation layer is formed at a predetermined region of a semiconductor substrate to define an active region. A pair of preliminary lightly doped diffusion layers are formed in a line to cross over the active region. Then, oxide patterns are formed to cover at least the preliminary lightly doped diffusion layers. The oxide pattern defines a channel region. A gate oxide layer is formed on the channel region and a gate electrode is formed to cover the channel region and to cross over the active region. The edge of the gate electrode is over the oxide pattern. A heavy doped diffusion layer is formed in the active region of both regions of a gate electrode and shallower than the lightly doped diffusion layer.